WO2018095880A1 - Sorption heat-exchange dehumidifier, dehumidifying device, and method for dehumidification - Google Patents

Abstract

The invention relates to a sorption dehumidifier (100), comprising a plurality of sorption chambers (110); a plurality of cooling chambers (120), which are arranged adjacent to the sorption chambers (110); and intermediate walls (130), which separate the sorption chambers (110) from the cooling chambers (120), wherein at least the sides facing the sorption chambers (110) are at least partly coated with a desiccant (140); wherein the sorption chambers (110) in a first region (I) of the sorption dehumidifier (100) are designed to extract moisture from a gas, in particular air, by means of the desiccant (140) by adsorption; the cooling chambers (120) in the first region (I) are designed to conduct a cooling medium, by means of which the heat arising in the adsorption process can be led away; the sorption chambers (110) and/or the cooling chambers (120) in a second region (II) of the sorption dehumidifier (100) are designed to conduct a drying medium in order to extract moisture from the desiccant (140); the cooling chambers (120) in a third region (III) of the sorption dehumidifier (100) are designed to conduct a pre-cooling medium in order to cool the desiccant (140); and an association of the sorption chambers (110) and the cooling chambers (120) can cyclically switch from the first region (I) into the second region (II), from the second region (II) into the third region (III) and from the third region (III) back into the first region (I). The invention further relates to a dehumidifying device equipped therewith and to a method for dehumidification.

Description

 SORPTION HEAT EXCHANGE DEHUMIDIFIERS, DEHUMIDIFICATION DEVICE AND METHOD FOR

 DRY

The invention relates to sorption dehumidifiers, dehumidifying devices with a sorption dehumidifier and dehumidification process. Devices and methods of this kind can be used for example in air conditioning or in drying processes.

The separation of latent and sensible heat in air conditioners is an energy efficient approach to controlling the humidity and temperature of air inside buildings or vehicles because of its lower power consumption. Dehumidification by desiccant is used in this type of air conditioners to latent heat too

eliminate, while the sensible heat through a

corresponding power-saving cooling system is reduced. Desiccant dehumidifying systems are considered to be efficient systems due to two approaches

Reduction of energy or electricity consumption of

Air conditioners viewed: on the one hand, alternative

Energy sources such as solar or surplus heat are used to dry the desiccant; Furthermore, the setpoint temperature of the system for

Control of sensible heat can be increased because the system only has to reduce the sensible heat.

In recent years, various types of dehumidifying devices have been used with desiccants

Air conditioners used, including rotary dehumidifiers with desiccants. These are by the following

Characteristics: i) they dehumidify the Ambient air continuously; ii) they are simple in design and easy to maintain; and iii) they have a high degree of adsorption due to a thick desiccant layer. In addition, the desorption of the sorptive material can also be carried out by means of simple heat sources, such as solar energy or excess heat from other processes.

However, this type of dehumidifying system generally has two problems caused substantially by the heat generated during the adsorption process. The generated heat of adsorption is by the

absorbed sorptive material and the air flow, resulting in a significant reduction of the adsorption potential of the material and to increase the air flow temperature. Due to technical limitations, there is currently no way to directly cool the desiccant layer. Only the outgoing, dried air stream can be brought to a desired temperature by means of a heat recovery system and / or an indirect evaporative cooling process. As further problems, the heat stored in the rotary dehumidifier and the further elevated temperature after desorption must be considered.

US 7,305,849 B2 discloses an evaporative cooled sorptive heat exchanger in which the adsorption process and evaporative cooling occur at the same time. in the

As a result, the generated heat of adsorption is compensated to some extent by the effect of evaporative cooling. Accordingly, advantages such as increasing the desiccant efficiency of the desiccant layer, cooling the expelled airflow, and saving power are achieved through the use of an energy efficient cooler made possible by the reduction of the sensible heat of the expelled airflow. A quasi-continuous dehumidification process of the air to be dehumidified can be achieved if two sorptive heat exchangers are used in parallel. While one of the heat exchangers adsorbs moisture, the drying material of the other heat exchanger is regenerated by heated air.

However, the use of two sorptive heat exchangers increases the complexity of the dehumidifying system due to the increased number of input lines, output lines and louvers, thereby increasing the risk of unwanted leakage or mixing of air. In addition, the large number of lines and the two for the

Heat exchangers required chambers considerable space requirements.

The US RE 38 181 E describes a heat exchanger in the form of a rotating wheel, which carries an adsorbent material. Similar to the rotary dehumidifiers described, the described dehumidifier rotates between adsorption and regeneration sections. The damp

Ambient air passes axially through coated ribs in the adsorption area. The air is dried and

Adsorption heat is generated. At the same time, within the adsorption zone, the ambient air is conducted radially between fins in second channels which are separated from the drying channels by thermally conductive plates. The released adsorption heat in the drying channels is absorbed by the radial air flow. This emerges in the center of the wheel from this and is heated by a heater on. This is followed by the heated regeneration air thus generated in the regeneration area

coated ribs to that in the adsorption area

absorb adsorbed water. The dehumidification system thus enables a continuous dehumidification process, as it also occurs in rotary dehumidifiers. The sorptive material is also cooled during the adsorption process. The sorptive wheel of the US RE 38 181 E, however, has the problem that the drying material and the wheel store heat during the regeneration process. The stored heat raises the temperature of the sorptive material, ie the drying material, which reduces the adsorption potential. In addition, the structure of the dehumidifier of US RE 38 181 E is complicated and during the

Regeneration process energetically inefficient.

It is therefore the object of the invention, a sorption dehumidifier, a dehumidifying device with such a sorption dehumidifier and a dehumidifying process

To provide a highly efficient, energy-saving and continuous dehumidification.

This object is achieved by a sorption dehumidifier according to claim 1, a dehumidifying device according to claim 4 and a dehumidifying method according to claim 9.

Advantageous developments are specified in the subclaims.

A sorption dehumidifier comprises a plurality of

Sorption chambers, a plurality of cooling chambers, the

are arranged adjacent to the sorption chambers and

Between walls. The partitions separate the sorption chambers from the cooling chambers. At least the side of the partitions facing the sorption chambers are at least partially coated with a desiccant. Here, in a first region of the sorption dehumidifier, the sorption chambers are adapted to extract moisture from the adsorption by a gas through the desiccant, and the cooling chambers are adapted to guide a cooling medium through which the heat produced during adsorption can be dissipated. In some embodiments of the invention, the gas and / or the cooling medium

Contain or consist of ambient air. In a second region of the sorption dehumidifier, the sorption hammers and / or the cooling chambers are arranged to guide a drying medium, for example air, in order to extract moisture from the desiccant. In a third region of the sorption dehumidifier, the cooling chambers are arranged to guide a pre-cooling medium, for example air, in order to cool the desiccant. An assignment of the sorption chambers and the cooling chambers can cyclically change from the first region into the second region, from the second region into the third region and from the third region back into the first region.

In the sorption dehumidifier can so simultaneously

various tasks are performed. On the one hand, it is possible in the first area of the sorption dehumidifier to dehumidify gas flowing through the sorption dehumidifier, such as air. For this purpose, the gas is passed through sorption chambers, the interior walls of which are at least partially covered by a desiccant, such as silica gel, zeolite, hygroscopic salts, such as lithium chloride, or the like,

are coated. There, the desiccant adsorbs

Moisture which releases heat of adsorption. The dehumidified gas is passed out of the sorption dehumidifier and e.g. used in an air conditioner.

Under a dehumidification of a gas stream is for the

Purpose of the present invention, a process understood, which reduces the humidity or the water content of the gas stream between inlet and outlet from the sorption chambers. This does not exclude that even after the

Passing through the sorption chambers of the gas stream still contains a residual moisture. In some embodiments, the

Invention, the gas stream instead of water, another component can be removed by adsorption, for example, a solvent or a pollutant. In order to prevent or at least limit heating of the drying agent, cooling chambers are arranged adjacent to the sorption chambers, which share at least those walls with the sorption chambers, which communicate with the sorption chambers

Desiccant are at least partially coated. These partitions are preferably made of a thermally conductive material and direct the heat of adsorption of the desiccant in the cooling chamber. The material of

Partitions can contain or consist of a metal or an alloy. In some embodiments, the

Invention may contain the material of the intermediate walls copper or aluminum. In other embodiments of the

Invention, the intermediate walls can be a plastic

contained, which is provided with fillers greater thermal conductivity. Thereby, the heat of adsorption of the cooling medium flowing through the cooling chambers, e.g. Air or cooling water or oil, taken from and out of the

Sorption dehumidifier and optionally discharged from the surrounding air conditioning.

In the first area of the sorption dehumidifier, therefore, efficient adsorption can be achieved by cooling.

In addition, cooling of the dehumidified gas can also be achieved by cooling the drying agent.

In the second area of the sorption desiccant, the functions of the sorption chambers and the cooling chambers change

to the effect that they are no longer flowed through by dehumidifying gas or cooling medium, but at least one of the types of chambers leads a gaseous drying medium, which withdraws the desiccant previously absorbed by adsorption moisture again. In the second area, therefore, a regeneration of the drying agent takes place, which is necessary in particular when the drying agent is saturated with moisture in such a way that further absorption of moisture is greatly restricted or even no longer possible. As the drying medium, a hot, dry gas, such as air, may be used, which flows through the sorption chambers. On the one hand it heats the desiccant by direct contact, on the other hand it can absorb moisture released from the desiccant and carry it out of the sorption chambers. For that in the cooling chambers

drying medium used or drying gas, it is sufficient if it is hot enough to heat the desiccant over the partitions. Since there is no direct contact between the drying medium fed into the cooling chambers and the desiccant, the amount of moisture contained in the drying medium of the cooling chambers is essentially irrelevant to the regeneration of the desiccant. Therefore, it is possible, for example, hot, dry gas, such as air, when passing through the sorption due to dehydration of the

Desiccant has absorbed moisture to conduct for further heating of the drying agent through the cooling chambers. There, the heat is passed through the intermediate walls to the desiccant.

The second region of the sorption dehumidifier thus ensures efficient regeneration of the desiccant.

In the third area, in turn, a coolant, such as air, flows through the cooling chambers. This pre-cooling medium is used to cool the desiccant to a temperature suitable for effective adsorption of moisture, after the moisture previously absorbed in the first region therein has been baked in the second region. The pre-cooling medium flows through only the cooling chambers and not the sorption chambers, and indirectly cools the desiccant over the intermediate walls to prevent adsorption of moisture from the pre-cooling medium, which could limit the efficiency of dehumidification in the first region. In the third area of the sorption dehumidifier it is thus ensured that the desiccant on entering the sorption chambers in the first area one for the

Dehumidification has appropriate or optimized temperature.

The cyclical change of the assignment of sorption chambers and cooling chambers to the different areas of the sorption desiccant ensures that all areas can achieve their effect at the same time, whereby efficient and continuous dehumidification becomes possible.

It should be noted here that preferably the

Assignment of the areas to the sorption chambers and the cooling chambers changes, i. in a reference system of the sorption desiccator, in which the sorption chambers and cooling chambers have fixed positions, the various regions travel over the sorption dehumidifier. In one

Reference system in which the first, second and third regions, e.g. fixed by the outlet openings of pipes / tubes, this is achieved by the movement of the sorption dehumidifier as a whole, e.g. by a turn. On the other hand, it is also conceivable that only parts of the sorption desiccant, which have the sorption chambers and the cooling chambers, move relative to other, fixed parts of the sorption desiccant and thereby changes the assignment to the areas.

The sorption dehumidifier can be cylindrical. Then, the sorption chambers and the cooling chambers may be formed as segments along an azimuthal direction of the sorption desiccant and the cyclic change

between the first region, the second region and the third region can be effected by rotation of the sorption desiccant in the azimuthal direction. This represents a particularly simple construction of the sorption desiccant. Along the circumferential direction of the cylindrical sorption desiccant are the individual sorption and cooling chambers formed, for example, alternately. By turning the sorption dehumidifier in the azimuthal direction, ie around its

Center axis, each chamber passes through all three areas in one revolution, so that all desiccant present in the sorption dehumidifier the cycle: adsorption and cooling; baking; Pre-cooling undergoes.

An external form of the desiccant dehumidifier may be one

Form hollow cylinder, the intermediate walls can extend in the radial direction and in the axial direction through the entire hollow cylinder and thus separate the sorption chambers and the cooling chambers in the azimuthal direction. In this case, the sorption chambers can be closed in the axial direction and open in the radial direction and the cooling chambers can be open in the axial direction and closed in the radial direction.

Gases and / or fluids, i. Media, so can the

Sorption chambers only in the radial direction, the cooling chambers flow only in the axial direction. The flow through the sorption chambers is preferably carried out from outside to inside, i. the gases exit at the inner cylindrical surface of the hollow cylinder. This ensures that the degree of dehumidification of gases and their temperature is kept stable. Namely, in different sorption chambers due to differences in the state of the

Desiccant, resulting from manufacturing tolerances and / or the already performed adsorption

(Desiccant at the beginning of the first range compared to desiccant at the end of the first range), the degree of dehumidification and the temperature of the gases flowing through be different. These differences can be leveled by the mixing of all air flows.

A dehumidifying device comprises a sorption dehumidifier as described above and a plurality of wires. In this case, first lines are arranged to supply the sorption chambers in the first region with the gas, which is deprived of moisture with the desiccant by adsorption, and to remove the gas thus dried. Second lines are adapted to supply the cooling chambers in the first region of the cooling medium, is absorbed by the heat generated during the adsorption, and to dissipate the thus heated cooling medium. In the second area, third lines are set up to supply the drying medium to the sorption chambers and / or the cooling chambers, which extracts moisture from the desiccant and to remove it. In the third area, fourth lines are arranged to supply the cooling chambers with the pre-cooling medium, which cools the desiccant, and to dissipate the pre-cooling medium heated thereby.

The dehumidifying device further comprises a motor which is adapted to cyclically change the allocation of the sorption chambers and the cooling chambers to the first region, the second region and the third region by turning the sorption desiccant.

By this construction, a dehumidifying device is provided, which can supply the above-described sorption dehumidifier in a manner arranged with the gas or fluid streams necessary for its operation.

The cooling medium and / or the pre-cooling medium may be a cooling gas. The cooling gas may contain or consist of air. Furthermore, the dehumidifying device may comprise saturation means which are adapted to supersaturate the cooling medium or precooling medium supplied to the cooling chambers in the first region and the third region with water vapor in such a way that it is arranged to cause evaporative cooling. For this purpose, the cooling gas can also be cooled in order to bring it into supersaturation. Due to the supersaturation of the for cooling the Desiccant used medium, such as air, it comes immediately to the evaporation of moisture as soon as the (pre) cooling medium absorbs heat. The resulting evaporation or evaporative cooling increases the

Effectiveness of the cooling of the drying agent considerably. As a result, the dehumidified gas is cooled more, which in turn may be in air conditioners for further

Reduction of sensible heat, or temperature,

reduced energy required.

The third lines may be configured to first in the second area the drying medium by the

Sorption chambers and then to pass through the cooling chambers. As described above, this increases the efficiency of the drying process of the desiccant. The dry, hot drying medium, e.g. Air is passed through the sorption chambers, heats the desiccant contained therein and absorbs moisture released by the desiccant. Thereafter, the drying medium is not ejected, but passed into the cooling chambers, where it serves for further heating of the drying agent through the intermediate walls. So it comes to a heating of the drying agent of two opposite sides. About the sorption chambers, the surface of the drying agent is heated, the cooling chambers and the intermediate walls, the rear side. The desiccant is thus not only faster, but also more uniformly heated, which in turn increases its adsorption potential on the next pass through the first region.

The dehumidifying device may further include a

Have heat exchanger, which is adapted to heat from discharged drying medium to be supplied

Transfer drying medium. In some embodiments of the invention, an optional heating element may be provided which is adapted to further heat the drying medium heated by the heat exchanger and to use it as Add drying medium to the second area of the sorption desiccant. As a result, the energy efficiency of the heating of the drying agent in the second area is further increased. Instead of discharging the drying medium into the environment after passing through the sorption dehumidifier, it is passed to a heat exchanger and gives off its heat to the drying medium, eg air, which is provided for drying purposes, before it in the heating element has to be heated to the desiccant Temperature is brought and passed into the sorption dehumidifier.

This reduces the power to be applied by the heating element and thus the energy consumption of the dehumidifying device.

The dehumidifying device may further include movably mounted release means defining the first region, the second region, and the third region. The separating means are adapted to prevent the passage of gases and / or fluids flowing into the sorption dehumidifier or out of the sorption dehumidifier, i. Media, from the first area, the second area or the third area to prevent one of the other areas. The release agent can also be connected in a mobile manner with the sorption dehumidifier and then represent a part of the sorption desiccant.

The release agents define next to the various

Media feeding lines so also the different areas of the sorption desiccant. In some embodiments of the invention, the separation means ensure that gas to be dehumidified entering the sorption chambers in the first region does not enter the sorption chambers of the second region and the third region. In addition, they ensure that dehumidified gas leaving the sorption chambers does not return to the sorption dehumidifier, but to another

Use is ejected from the sorption dehumidifier. in the In return, the drying medium can only penetrate into the sorption chambers of the second area. To

Flow through the sorption chambers in the second region, the drying medium is either ejected or passed into the cooling chambers of the second region. The separating means also separate the stream into the cooling chambers of the second

Range of that in the cooling chambers of the first and third areas. A separation of the currents in the cooling chambers of the first and the third region is also possible if these currents should have different properties.

Due to the mobility of the release agents, the sizes of the different areas can be adjusted. In conjunction with the rotational speed of the sorption desiccant, it is possible to set the times in which the different chambers are used for dehumidification, regeneration or pre-cooling. The shift of

Release agent can either by hand or over

automatic actuators happen. The separating means are in this case preferably designed as movably arranged, sliding seals. For example, rubber or graphite gaskets can be used.

A dehumidifying method for dehumidifying air by a dehumidifier as described above includes: passing a gas, for example, air, through the sorption chambers in the first area, drying the gas through the desiccant in the sorption chambers in the first area, discharging the dried gas the sorption dehumidifier and passing a cooling gas, such as air, through the cooling chambers in the first region and in the third region to cool the desiccant in adjacent sorption chambers. The method further comprises: passing heated drying medium, such as air, through the sorbent chambers and / or the cooling chambers in the second region, to add moisture to the desiccant withdrawing and rotating the sorption desiccant to cycle sorption chambers and cooling chambers from the first area to the second area, from the second area to the third area, and from the third area back to the first area.

The dehumidification process allows gases, such as

For example, to dehumidify air in an efficient, energy-efficient and continuous manner. In the first zone, the gas is dehumidified by the desiccant in the sorption chambers. The resulting heat is efficient by the super-saturated with water vapor cooling gas

dissipated. The thus also cooled, dehumidified gas is for further use, e.g. in an air conditioner, ejected. Thereafter, the sorption chambers are heated in the second region and brought in the third region indirectly via the precooling medium to a temperature which a

efficient, re-adsorption allowed in the first area.

Here, the heated drying medium in the second

Passed first through the sorption chambers and then through the cooling chambers. The heat of the heated drying medium can then be used after passing through the cooling chambers in the second region for preheating the drying medium, which is then passed after passing through an optional heating element as a heated drying medium in the sorption chambers in the second area.

Thereby, as explained above, the efficiency of the

Bake the drying agent increases. The heat of the drying medium is used three times: to heat the top of the desiccant in the sorption chambers, to heat the back of the desiccant over the

Partitions to the cooling chambers and for preheating of newly supplied drying medium. This will become one

uniform heating of the drying agent and a

Reduction in heating of the desiccant

necessary energy is reached. The gases and media described above may be all the ambient air surrounding the sorption dehumidifier or the dehumidifier. The described devices are then used for dehumidifying ambient air, preferably in air conditioning systems, eg in

Buildings or vehicles. Both the heating and the cooling of the drying agent is then carried out with appropriately pretreated, i. heated or cooled and / or supersaturated with water vapor ambient air. This allows the cooling of air without the need to provide additional cooling or drying media.

With the present invention, it is thus possible, the adsorption potential by pre-cooling the sorptive

To increase drying agent in the third range. In addition, through the use of indirect evaporative cooling during the adsorption phase in the first region and the

Pre-cooling phase in the third range, the adsorption potential can be further increased. The energy efficiency is further increased by the multiple use of the heat of the medium used for heating.

Thus, the following essential advantages are achieved by the present invention: i) dehumidification can be carried out continuously; ii) an increased adsorption potential can be achieved through the use of evaporative cooling during adsorption, whereby the dehumidified gas is simultaneously cooled; Inserting a pre-cooling phase (third area) after the regeneration phase (second area), the adsorption potential can be obtained by cooling the previously heated during the regeneration

Drying agent can be increased and iv) by the three times the reuse of the drying medium, the

Energy efficiency of the system can be increased. In addition, the sorption dehumidifier described above and the above

described dehumidifier of compact construction and require only a relatively small number of inlet and outlet pipes, which in turn require little space.

The present invention will be described below with reference to the figures based on exemplary embodiments. Show it

1 is a schematic representation of sorption chambers and cooling chambers or regeneration chambers according to an embodiment,

FIG. 2 is a schematic representation of a sorption chamber delimited by intermediate walls according to an embodiment; FIG.

3 is a schematic representation of a sorption desiccant according to an embodiment,

Fig. 4 is a schematic representation of a

Line system of a dehumidifying device according to an embodiment,

Fig. 5 is a schematic side view of a

Line system of a dehumidifying device according to an embodiment and

6 is a schematic plan view of the conduit system of FIG. 5.

FIG. 1 schematically shows the construction of sorption chamber 110 and cooling chambers or regeneration chambers 120 of a sorption desiccant 100. Sorption chambers 110 are separated from adjacent cooling chambers 120 by a common intermediate wall 130. The intermediate wall 130 in this case preferably consists of a material of high

Thermal conductivity such as a thin

Aluminum plate or a copper plate. The sorption chambers 110 form a process channel through which a gas to be dehumidified, such as air, flows. This is in Fig. 1 by the in the positive x-direction

pointing arrows. When flowing through the

Sorption chambers 110, the gas enters into direct contact with a desiccant 140 which is applied on the side of the sorption chambers 110 on the intermediate walls 130. The desiccant 140 has strong adsorptive properties and is designed to extract moisture from the gas as it flows past, thereby drying the gas. The desiccant 140 may be, for example, a layer of granular silica gel, zeolite or the like. The thickness of the layer is determined by the desired adsorption and in principle arbitrary.

The adsorption of moisture in the drying agent 140 releases heat, which heats the desiccant 140 and the intermediate walls 130. To dissipate this heat, flows through the cooling chambers 120, a stream of cooling medium, such as air or water. The direction of the flow of the cooling medium in the cooling chambers 120 may be the

Crossing direction of the current in the sorption chambers 110 and, for example, as shown in Fig. 1, perpendicular or in the

Be essentially perpendicular to it. This increases the efficiency of the cooling and facilitates the separation of the streams during the introduction into the sorption dehumidifier 100.

During the adsorption in the sorption chambers 110 resulting heat is thus dissipated via the cooling chambers 120. This ensures that the desiccant 140 does not reach a temperature at which the adsorption potential of the desiccant 140, i. the ability of

Desiccant to absorb moisture from the environment is reduced. At the same time, the gas flowing through the sorption chambers 110 is cooled, which has the advantage, in particular when using air in air conditioning systems, that subsequent cooling is less energy-intensive. For example, ambient air may be used as the cooling medium, which is pretreated in such a way that it causes evaporative cooling of the intermediate walls 130 and thus of the desiccant 140 during the passage through the cooling chambers 120. For example, air may be cooled and / or so saturated with moisture prior to entering the cooling chambers 120 or moistened during passage of the cooling chambers 120 such that heating of the supersaturated air immediately results in evaporation and thus cooling of the intermediate walls 130.

As the drying agent 140 only a limited amount

It is necessary to absorb moisture

Adsorption potential at certain intervals by drying the drying agent 140 to regenerate. For this purpose, a heated drying medium, such as heated ambient air, which contains as little moisture through the

Sorption chambers 110 and / or the cooling chambers 120 passed. The regeneration of the drying agent 140 in the sorption chambers 110 takes place here by direct contact with the drying medium flowing through the sorption chambers 110. At this time, the desiccant 140 is heated therein

adsorbed moisture evaporates and gets through the

Drained drying medium.

Additionally or alternatively, during the regeneration of the drying means 140, a hot drying medium flows through the cooling chambers and heats the intermediate walls 130. These forward the heat to the desiccant 140, which is thereby heated at its rear side. In

Combining the two regeneration streams, the drying agent 140 is thus uniformly heated and thus the

Regeneration of desiccant 140 accelerates and improves.

Since there is no direct contact with the desiccant 140 in the flow through the cooling chambers 120, this can Drying medium in the cooling chambers 120 relative to the

Sorption chambers 110 contain more moisture. To the

For example, the stream of drying medium may first be passed through the sorption chambers 110 and then through the cooling chambers 120.

Following regeneration, desiccant 140 and sorbent desiccant material are 100

heated. This sets the adsorption capacity of the

Desiccant 140 in contrast to the cooled case down. Therefore, the sorption chambers 110 and the cooling chambers 120 may be precooled in a third phase of operation before being reused for dehumidification. For this purpose, as in the adsorption, the cooling chambers 110 are flowed through by a pre-cooling medium in order to cool the drying agent 140 indirectly via the heat-conducting intermediate walls 130. As in the adsorption case, the cooling medium can also assist in this an additional evaporative cooling, for example by using a supersaturated with water vapor gas, such as air, for cooling. The cooling of the cooling chambers 120 can be exactly the same in the adsorption and during precooling. But it is also possible to choose different settings in terms of the cooling medium in both phases.

In contrast to the adsorption case flows through in the

Pre-cooling phase no gas sorption chambers 110, to prevent the drying agent 140 absorbs moisture already in the pre-cooling phase. In the case of a premature flow through the sorption chambers 110 with gas to be dehumidified already in the pre-cooling phase, dehumidification would be insufficient on account of the still elevated temperature of the desiccant, which would lead to undesired results with respect to the drying of the gas. FIG. 2 shows a single pair of intermediate walls 130 coated with desiccant 140 which form a sorption chamber 110 in their interior.

As shown in Fig. 3, it is possible a

cylindrical sorption dehumidifier 100 from such pairs of partitions 130 form. The sorption dehumidifier 100 shown in Fig. 3 comprises a plurality of sorption chambers 110 and a plurality of cooling chambers 120, which according to the principle described above for the adsorption of

Moisture from a gas can be used. The intermediate walls 130 in this case extend completely through both in the radial and in the axial direction

Desorption dehumidifier 100. In the azimuthal direction, the sorption dehumidifier 100 is segmented into the sorption chambers 110 and the cooling chambers 120. The number of sorption chambers 110 depends on the desired dehumidifying performance of the desiccant dehumidifier 100.

In the illustrated embodiment, the sorption chambers 110 can only be traversed by gas in the radial direction. At the front and rear of the sorption dehumidifier 100, the sorption chambers 110 are closed, e.g. by connecting the partitions 130 to another wall. Gas then flows over the outer cylindrical surface 102 in the

Sorption chambers 110 and occurs in the middle of the

Sorptionsentfeuchters on the inner cylindrical surface 104 again, as indicated in Fig. 3 by the arrow A.

In contrast, the cooling chambers are open in the axial direction and in the radial direction by plates attached to the inner and outer cylindrical surfaces 102, 104

locked. Alternatively, the inner cylindrical surface 102 and the outer cylindrical surface 104 of the desiccant dehumidifier 100 are per se continuous surfaces, which only at the

Connecting points to the sorption chambers 110

have slot-shaped openings. Liquids or gases can therefore flow in the axial direction through the cooling chambers 120, as indicated in FIG. 3 by the arrow B.

In FIG. 3, sorption chambers 110 and cooling chambers 120 are arranged alternately in the azimuthal direction. This allows the most efficient use of space. But it is also possible to arrange the chambers differently, as long as a cooling chamber 120 always to one with desiccant 140th

coated partition 130, i. to a sorption chamber 110, adjacent.

In Fig. 3, a configuration is shown in which a flow in the sorption chambers 110 only in the radial

Direction and a flow in the cooling chambers 120 only in the axial direction is possible. However, it is also possible to reverse the flow conditions in the chambers or to organize them completely differently, as long as the flow through the sorption chambers 110 is separated from the flow through the cooling chambers 120 and the operating principle of the chambers described above with reference to FIG

is impaired.

As shown in FIG. 3, the sorption chambers 110 and the cooling chambers 120 are partitioned by separating means 150 into various regions in which the various process phases described above with reference to FIG. 1 take place.

The separating means 150 initially comprise along an upper edge 106 and along a lower edge 108 of the

Sorptionsentfeuchters 100 circumferential sealing rings 156, 158. These are arranged to separate in the radial direction of the sorption dehumidifier 100 incoming media flowing in the axial direction media to.

This ensures that a flow intended for entry into the sorption chambers 110 can not enter into the cooling chambers 120 and vice versa. Furthermore, the separating means 150 include boundaries 152, 153, 154 defining a first area I, a second area II and a third area III. The delimitation 152 between the first region I and the second region II in this case separates both axial flows in the first region I from axial flows in the second region II and radial flows in the first region I from radial

Flows in the second area II. Likewise, the boundary 153 between the second area II and the third area III separates both types of flows between the two areas. The boundary 154 extends only along the axial direction of the sorption dehumidifier 100, but not in its radial direction. So it just separates the

radial flows between the third region III and the first region I. The axial flows in the first region I and in the third region III are therefore identical in the embodiment of FIG. If necessary, but also the delimitation 154 can be a complete separation of

Flows between the first region I and the second region III effect by extending along the entire radial length of the sorption dehumidifier 100 as well as the other boundaries 152, 153. It goes without saying that the parts of the separating means 150 shown in the visible parts of FIG

Have correspondences in the spatially hidden parts.

In the inner region of the sorption dehumidifier 100, the separating means 150 ensure that dehumidified gas flowing into the inner region in the first region I is passed out of the sorption dehumidifier and not in the radial direction from the inside to the outside through the sorption chambers 110 into the second region II or the third Area III flows. In the same way, a transfer of the drying medium from the second region II into the other two regions in the inner region of the sorption desiccant 100 is prevented. This can be ensured, for example, by the fact that, in the inner region of the sorption dehumidifier 100, partition walls extend in the axial direction over the entire height of the sorption desiccant 100, which separate all areas from one another. The segment of the third region III is closed inside the sorption desiccant 100 at the front and back of the sorption desiccant. The segment of the first region I is closed only on one of the front or back, while the segment of the second region is closed on the other one of the front or back.

As shown in Fig. 3, flows in the first region I, ie at the back, are guided in the axial direction of the sorption dehumidifier 100, while flows are discharged in the second region at the front and no flow from the interior of the sorption desiccant ago in the sorption chambers 110 can penetrate in the third area III.

By the separating means 150 can be achieved that the various functions of the sorption chambers 110 and the cooling chambers 120, as described with reference to FIG. 1

can be carried out simultaneously in a sorption dehumidifier. It goes without saying that the configuration of the separating means 150 shown in FIG. 3 is exemplary and any other

Configuration is also possible, which is a separation of the different area as described above

allows.

In the first area I, the sorption chambers 110 are supplied with the gas to be dehumidified from outside. It flows through the sorption chambers 110 into the interior of the desiccant dehumidifier 100. There, it is prevented by the separating means 150 from passing into other regions and is guided out of the sorption dehumidifier 100. At the same time flows through in the first area I the cooling medium, the cooling chambers 120 in the radial direction and thus leads to the resulting from the adsorption heat from the dehumidifying gas and the drying agent 140 from.

Due to the separating means 150, neither the gas to be dehumidified nor the cooling medium pass into the second region II. Here, a drying medium flows through the sorption chambers 110 and / or the cooling chambers 120 in order to regenerate the

Drying agent 140 bring about. Preferably, the drying medium initially flows radially through the sorption chambers 110 inwardly, thereby leading to the in the

Desiccant 140 adsorbed moisture. Hereupon, the separating means 150 directs the flow out of the sorption dehumidifier 100 in such a way that it can be conducted in the axial direction through the cooling chambers 120, which leads to a further heating of the intermediate walls 130 and of the desiccant 140 arranged thereon. However, flows of drying medium through the sorption chambers 110 and the cooling chambers 120 can also be formed completely independently of each other.

In the third region III, no gas flows through the sorption chambers 110 to prevent premature reduction of the adsorption capability of the desiccant 140. At the same time, the cooling medium flows through the cooling chambers and thereby indirectly cools the drying agent 140 via the intermediate walls 130 to one for adsorption thereto

set temperature.

In order to ensure a continuous regeneration of the drying agent 140 and thereby a continuous dehumidification by the desiccant 140, the sorption dehumidifier 100 is slowly rotated along the azimuthal direction, as indicated by the arrow C in FIG. As a result, the sorption chambers 110 and the cooling chambers 120 arrive cyclically in succession from the first region I in which the adsorption process takes place second area II, in which the drying agent 140th

is regenerated, and from there to the third region III, in which the desiccant 140 is pre-cooled before re-entering the first region I. The rotation is mediated for example by a motor. Your speed can be freely adjustable. In some

Embodiments of the invention may include the engine

Stepper motor, which in addition to the continuous or quasi-continuous operation alternatively or

additionally allows a gradual operation. In this case, the sorption dehumidifier can be preset in

Time intervals around a predefinable angle range

be further rotated and stand still in between.

The separating means 150 are in sealing, sliding contact with the sorption dehumidifier 100 in order to ensure the separation into the different areas can. The release agent 150 can either be part of the

Sorptionsentfeuchuchter 100 or a dehumidifier are considered, in which the sorption dehumidifier 100 is installed or integrated. The release agent consist in one embodiment of an elastic material, such as abrasive rubber seals or with

sealing materials coated body. The sealing materials may be selected from rubber or graphite or amorphous diamond-like carbon or polytetrafluoroethylene.

The division generated by the separating means 150 of the

Chambers of the sorption desiccant in different areas can be fixed, ie fixed in the preparation of the release agent 150 by shaping, be. However, the division can also be freely adjustable by the possibility of moving the delimitations 152, 153, 154 between the regions. It is then possible to assign each of the individual areas a certain size or a certain range of angles, which then the relative length of stay of Chambers at constant rotational speed in the areas determined. Together with the freely adjustable rotational speed can be determined by how long the running in each area phases, ie adsorption phase, regeneration phase and pre-cooling last. This makes it possible to optimally adjust the dehumidification with the sorption dehumidifier 100 to the desired process result and / or the prevailing ambient conditions, such as gas humidity, pressure or temperature. In some embodiments of the invention, the adsorption phase and the regeneration phase are about the same length and the pre-cooling phase is short in comparison. In other embodiments of the invention, the adsorption and regeneration phases differ in length.

The release agent 150 can be adjusted by hand, which requires accessibility to the release means 150 from the outside. The position of the release agent 150 may also be internal by a dehumidifier

existing facilities, such as Actuators are adjusted automatically or on the basis of an input command, without it being necessary, the release means 150 from the outside to

to reach .

FIG. 4 shows schematically the installation of sorption desiccant 100 in the pipe system of a dehumidifying device. The boundary 152 between the first area I and the second area II can be seen in front left in FIG. 4. In the first area I (and in the non-visible third area III) above and below the sorption desiccant 100 arranged lines ensure that cooling medium flows through the cooling chambers 120. Likewise, in the second region II lines ensure that drying medium flows through the chambers. The drying medium is here by the arcuate transition after passing through the

Sorption chambers 110 in the second region II from the interior of the sorption dehumidifier 100 the cooling chambers 120 in the second Area II fed from above for further heating of the drying agent.

The dehumidified gas flows radially to the sorption dehumidifier 100 in the first region I from the outside and is guided by the corresponding sorption chambers 110 inwardly and thereby dehumidified. It exits from inside the sorption dehumidifier in the axial direction downwards. In the second region II, the drying medium flows from the outside radially through the sorption dehumidifier 100 before it passes through the

Line system is passed through the cooling chambers 120 in the second region II. In other embodiments of the invention, the sorption dehumidifier 100 need not be arranged horizontally. In addition to a horizontal arrangement of the

Sorptionsentfeuchters is also a vertical or any other arrangement conceivable to make the best use of the available space.

FIG. 5 again illustrates the streams fed to and removed from the sorption dehumidifier 100 in a dehumidifying device and the dehumidifying method carried out as a result. Via feed lines 1, the gas to be dehumidified, e.g. Air, in particular ambient air, brought to the sorption chambers 110 in the first region I, flows through them and is discharged via the discharge line 2 from the dehumidifying device for further use, e.g. in an air conditioner, discharged.

The feed line 3 carries the cooling medium, preferably a cooled gas supersaturated with water vapor, eg air, in particular ambient air, in the axial direction through the cooling chambers in the first region I and / or in the third region III in order to cool or pre-cool the desiccant 140. The saturation or cooling can be done by the supply line 3 upstream, not shown, saturation means of the dehumidifier. About the derivative 4, it is removed from the dehumidifier. Via a feed line 5, the drying medium, for example air, in particular ambient air, a heating element 160 is supplied and heated there to a set up for the regeneration of the drying means 140 temperature. The heating element 160 may be, for example, an electric heating unit or by means of heat from solar energy, an exhaust gas stream or residual or excess heat from other systems, such as a

Engine cooling, operated. The heating element 160 may also be outside the dehumidifying device and / or

away from the sorption dehumidifier 100, which may result in a more compact and flexible installation of the dehumidifying device.

From the heating element 160, the drying medium via the supply line 7 from the outside in the radial direction through the

Sorptionskammern 110 performed in the second region II and absorbs moisture from the desiccant 140 there. About the discharge 8, the drying medium is then brought out of the interior of the sorption desiccant 100 out in the supply line 9, from which it is in the cooling chambers 120 in the second

Area II is led. There is a renewed

Heat exchange with the desiccant 140 over the

Partition walls 130.

The drying medium is then fed via the discharge line 10 to a heat exchanger 170, which transfers the heat still remaining in the drying medium to the drying medium newly flowing in via the feed line 5 in order to preheat the latter before it enters the heating element 160. The im

Drying medium stored heat is thus best utilized to reduce energy consumption.

The embodiment of FIG. 5 has only eight Zu- or

Discharge on and requires no louvers. As a result, a compact arrangement with a small sorption dehumidifier 100 is possible, in which only a small risk of unwanted Air mixing exists. In addition, the pressure drop along all flow paths is low.

In Fig. 6, the conduit system of the dehumidifying device is shown schematically in plan view. In addition to the line system, the boundaries 152, 153, 154 between the first area I, the second area II and the third area III are shown. These boundaries are thus accessible from outside the conduit system and may be here e.g. be manually or automatically changed in position to adjust the size of each area. The size of each individual area I, II and III can according to the boundary conditions of temperature and humidity of the individual gas streams to be dehumidified

Gas stream, the Trochnungsmediums and the cooling medium

be optimized.

The present invention is characterized by

continuous adsorption of moisture and the

Possibility of additional, simultaneous

Evaporative cooling, which effectively dissipates the heat generated during adsorption and efficient

Pre-cooling possible. The system may be combined with other air treatment methods such as e.g. membrane-based enthalpy recovery.

The described devices and methods can be used for dehumidifying gases for all conceivable processes. In some embodiments, the use for dehumidifying ambient air in air conditioning systems, e.g. in rooms or vehicles, as described

Devices are compact in construction and all

required flows can be provided by the ambient air.

Of course, the invention is not limited to the illustrated embodiments. The above Writing is therefore not to be considered as limiting but as illustrative. The following claims should be understood to include a named feature in at least one embodiment of the invention. This does not exclude the presence of further features. As long as the claims and the above description define "first" and "second" embodiments, this term serves to distinguish two similar embodiments without prioritizing them.

Claims

claims Sorption dehumidifier (100), comprising:  a plurality of sorption combs (110);  a plurality of cooling chambers (120) disposed adjacent to the sorbent chambers (110); and  Intermediate walls (130) separating the sorption chambers (110) from the cooling chambers (120), at least the sides facing the sorption chambers (110) being at least partially coated with a desiccant (140); in which  the sorption chambers (110) in a first region (I) of the sorption dehumidifier (100) are adapted to extract moisture by adsorption to a gas with the desiccant (140);  the cooling chambers (120) in the first region (I) are adapted to guide a cooling medium through which the heat generated during adsorption can be dissipated;  the sorption chambers (110) and / or the cooling chambers (120) in a second region (II) of the sorption desiccant (100) are adapted to guide a drying medium to the desiccant (140)  Remove moisture;  the cooling chambers (120) in a third region (III) of the sorption dehumidifier (100) are adapted to guide a pre-cooling medium to cool the desiccant (140); and  an assignment of the sorption chambers (110) and the cooling chambers (120) cyclically from the first region (I) in the second region (II), the second region (II) in the third region (III) and of the third region (III) back can switch to the first area (I). 2. sorption dehumidifier according to claim 1, characterized in that the sorption dehumidifier (100) cylindrical is formed and the Sorptnnknämmern (110) and the cooling chambers (120) are formed as segments along an azimuthal direction of the sorption desiccant (100), wherein the cyclic change between the first region (I), the second region (II) and the third region (III) can be effected by rotation of the sorption desiccant (100) in the azimuthal direction. Sorption dehumidifier according to one of claims 1 or 2, characterized in that an outer shape of the Sorptionsentfeuchters (100) forms a hollow cylinder, wherein the intermediate walls (130) extending in the radial direction and in the axial direction through the hollow cylinder and so the sorption chambers (110) and the cooling chambers (120) in the azimuthal direction, the Sorption chambers (110) are open in the axial direction and closed in the radial direction and the cooling chambers (120) closed in the axial direction and are open in the radial direction. Containing dehumidifying device a sorption dehumidifier (100) according to any one of claims 1 to 3 and a plurality of conduits, wherein at least one first line is arranged to supply the gas to the sorption chambers (110) in the first region (I), which moisture is removed from the drying agent (140) by adsorption and the gas thus dried is discharged, at least one second line is adapted thereto in the first region (I) supplying the cooling chambers (120) with the cooling medium and removing the heated cooling medium and at least one third line being provided, with which in the second region (II) the sorption chambers (110) and / or the cooling chambers (120) the drying medium is zuführbar and at least a fourth line is present, with which in the third region (III) the cooling chambers (120) the pre-cooling medium is supplied and discharged, wherein the device further comprises a motor which is adapted to, by Rotate of sorption dehumidifier (100) allocation of  Sorptionskämmern (110) and the cooling chambers (120) to the first region (I), the second region (II) and the third region (III) to change cyclically. 5. dehumidifying device according to claim 4, further  containing saturation means, which are adapted to oversaturate the cooling chambers (120) in the first region (I) and the third region (III) supplied cooling medium or pre-cooling medium with water vapor. 6. Dehumidifying device according to one of claims 4 or 5, characterized in that the third lines are adapted to, in the second region (II) the  Pass the drying medium first through the sorption chambers (110) and then through the cooling chambers (120). 7. Dehumidifying device according to one of claims 4 to 6, further comprising a heat exchanger (170), which is adapted to heat from the discharged  Transfer drying medium in newly supplied drying medium and / or  a heating element (160) which is adapted to further heat the drying medium to be fed freshly heated in the heat exchanger before it is fed to the second area (II) of the sorption dehumidifier (100). 8. dehumidifying device according to one of claims 4 to 7 further comprising movably mounted release means (150) defining said first region (I), said second region (II) and said third region (III); wherein the separating means (150) are adapted to a passage of gases or media flowing into the sorption dehumidifier (100) or from the sorption dehumidifier (100) from the first region (I), the second Area (II) or the third area (III) in one of the other areas to prevent. 9. A method for dehumidifying gases with at least one dehumidifying device according to one of claims 3 to 8, comprising the following steps:  Passing a gas through the sorbent combs (110) in the first region (I);  Drying the gas through the desiccant (140) in the sorbent chambers (110) in the first region;  Ejecting the dried gas from the sorption dehumidifier (100);  Passing a cooling gas through the cooling chambers (120) in the first region (I) and in the third region (III) to cool the desiccant (140) in adjacent sorption chambers (110);  Passing heated drying medium through the  Sorption chambers (110) and / or the cooling chambers (120) in the second region (II) to the desiccant (140)  Remove moisture;  Rotating the sorption dehumidifier (100) to cycle sorption chambers (110) and cooling chambers (120) cyclically from the first region (I) to the second region (II), from the second region (II) to the third region (III) and out of the third area (III) back to the first area (I) to bring. 10. The method according to claim 9, characterized in that the cooling gas is supersaturated with water vapor. 11. The method according to claim 9 or 10, characterized in that the heated drying medium in the second  Section (II) is first passed through the sorption chambers (110) and subsequently through the cooling chambers (120) and  the heat of the heated drying medium after  Passing through the cooling chambers (120) in the second area (II) to preheat the drying medium is used; 12. The method according to claim 11, characterized in that the preheated drying medium before being introduced into the Sorptionskämmern (110) in the second area (II) Heating element (160) passes through. Method according to one of claims 9 to 12, characterized in that the cooling medium and / or the Drying medium and / or the precooling medium contains or consists of air. Method according to one of claims 9 to 13, characterized indicates that the gas contains or consists of air.