DE102009037881A1 - Sensor device for regenerating energy, has sensor that is inserted in bore in section wise manner, where sensor stands in effective connection with main circuit by secondary circuit - Google Patents

Abstract

The sensor device (1) has a sensor (2) that is inserted in a bore in section wise manner. The sensor stands in effective connection with a main circuit by a secondary circuit. The main circuit is provided for cooling or heating, particularly buildings. The secondary circuit of the sensor is provided with water, which is heated with a heating element. The sensor is made of polyethylene. A cooling medium is provided as carbon dioxide in geothermal pipe (4).

Description

The The invention relates to a probe device according to the Preamble of claim 1.

The Use of renewable energy gains in the Federal Republic Germany is becoming increasingly important as the greenhouse effect of Atmosphere essentially due to the burning of fossil Primary energy sources (coal, oil, natural gas) is due. By the reinforced Use of renewable and geothermal energy can be a reduction the carbon dioxide emission in the atmosphere can be achieved.

The Federal Republic of Germany used for building heating systems about one third of their total final energy in a temperature range below 100 ° C. In this temperature range is the ability to work the heat, the so-called Exergiegehalt low. Leading that conventional combustion heaters rely on natural gas or petroleum base a significant devaluation of the exergy stored chemical fuel energy through combustion and subsequent heat transfer to the lower temperatures, resulting in exergetic Primary energy use rates of only about 6% leads.

Boiler systems, For example, when operating with fuel oil or natural gas are practical arrived at the end of their technical development. Such systems achieve a degree of utilization that is slightly below that physical maximum lies.

Heat pumps Thermodynamic heating can be exergetic primary energy efficiencies reach of about four times as they heat out of the Environment and record these for heating pump required temperature. Come as an energy source while, for example, the energy of the ambient air, the surface waters or near-surface soil layers in question. geothermal Energy for heating buildings can be warmer by using hydrothermal deep water can be used directly when using geothermal probes up to about 100 m depth but only indirectly with heat pump systems, the geothermal energy in the temperature range of 8 ° C to 12 ° C on a usable temperature level for building heating (35 ° C or higher).

When Become a heat carrier for geothermal probes currently often single-phase agents, such as Water-glycol or water-salt mixtures are used, then through the geothermal probes referred to as brine probes to a Be promoted evaporator of the heat pump. such Solesonden are also used to cool a building - in particular in the summer - used. A room heat is then over radiators arranged in rooms of the building - the to be used for heating in the winter - from one through a main circuit or heating circuit flowing Water received, this being promoted by a heating pump becomes. Subsequently, the room heat of the Water over a plate heat exchanger to a Sole forwarded through a secondary circuit or brine circuit flows, the flow the brine is generated by a brine pump. The with room heat heated brine is pumped through the brine probe, whereby the room heat flows into the cooler soil. The above described brine probe is for example from www.hakagerodur.ch known.

These Solution has the disadvantage that device technology extremely consuming a heating pump and a brine pump are used, which have a high energy requirement for driving. Another Disadvantage is that the brine is in circulation in the water hazard class 1 is classified, which requires a water permit power.

In contrast, The invention is based on the object, a cooling of buildings or rooms with low technical equipment To allow effort.

These Problem is solved by a probe device according to the Features of claim 1.

According to the invention a probe device one or more at least in sections in a well bore used probes. This one stands with one Main circuit used for cooling or heating, in particular of a building, serves, via a secondary circuit in active connection. The secondary circuit of the probe contains while water, which is heated with a heating element.

These Solution has the advantage that by the water in the secondary circuit a water hazard, as in the beginning in the Technology explained brine liquids, does not exist, and, for example, device engineering is leakage of Sole preventing preventive measures no longer necessary. However, in order to freeze the probe device at low temperatures, For example, in winter, to prevent, then just serves that Heating element.

advantageously, the heating element is an adjacent to the at least one probe arranged Geothermal ear, which is essentially self-sufficient by geothermal energy is operated, whereby no additional external energy, such as electrical energy, for heating the secondary circuit necessary is.

With Advantage is the secondary circuit with the also water connectable main circuit, whereby the water through both circuits with a single pump, for example a heating pump, is eligible. This lowers for a start the device-technical effort and saves on the other energy one.

In Another embodiment of the invention is the at least one probe approximately U-shaped, and the Erdwärmerohr is then placed between two legs of the probe approximately parallel thereto. hereby the at least one probe and the geothermal ear are space-saving can be used in a common well bore, and on the other hand is a large area Heat flow from the geothermal tube to the probe allows.

Around a simple insertion of the probe and the geothermal ear into the borehole, these are force, material and / or positively connected with each other.

When cost-effective connection of the probe and the geothermal ear Bands may be provided in the axial direction spaced from each other, the probe and the Erdwärmerohr firmly embrace.

The For example, a probe can be made of a conventional material like polyethylene.

Preferably, the geothermal tube is a component of a heat pump system for heating buildings, for example in winter, wherein the refrigerant in the circuit of the geothermal tube is CO ₂ .

A Flow of the secondary circuit of the probe is particularly easy via a heating water pump of the main circuit generated.

other advantageous developments of the invention are the subject of further Dependent claims.

in the Below is a preferred embodiment of Invention explained in more detail with reference to schematic drawings. Show it:

1 in a side view a probe device according to an embodiment; and

2 a temperature-time diagram of a geothermal tube of the probe device.

1 shows a side view of a probe device 1 according to an embodiment. This has a designed as an approximately U-shaped pipe probe 2 and a geothermal ear disposed adjacent thereto 4 , The probe device 1 is used in particular for heating and cooling a building. The geothermal ear is used for heating 4 used, which is a component of a heat pump system. Such a heat pump system is for example in the document DE 20 2008 008 351 U1 the applicant discloses.

The geothermal pipe filled with CO ₂ 4 provides a heat of vaporization for an evaporator 6 of the heat pump system and is together with the probe 2 used in a well bore, with a protruding from the well bore section of the geothermal ear 4 via a connection 8th with one of a pressure pot 10 surrounded condensation room 12 is connected, in which the evaporator 6 is included. In this condensation room 12 becomes gaseous from the geothermal ear 4 escaping CO ₂ condenses and then flows as a condensate film on the inner peripheral walls of the geothermal tube 10 back down to her foot. This cycle is in the detail in the DE 289 24 676 U1 and the DE 103 27 602 A1 disclosed by the applicant, so that in terms of the function of the Erdwärmerohrs 4 can be referred to these statements.

The one in the pressure pot 10 recorded evaporator 6 has two mutually axially offset copper tube coils 14 . 16 on. These are via a common input and output port 18 . 20 connected to the circulation of the heat pump system.

In the heat pump system, a refrigerant is added, for example, CO ₂ , which then via the input and output port 18 . 20 through the evaporator 6 is encouraged. The refrigerant is used in a heat exchange process to heat a medium, such as water, of a main heating circuit of the building.

With the main circuit is also the probe 2 for cooling the building - in particular in the summer months, at high temperatures - in operative connection, which is explained below.

The U-shaped probe 2 has two legs running parallel to each other in sections inserted into the earth hole 22 . 24 , which has a foot-side connecting element 26 connected to each other. Between the thighs 22 . 24 the probe 2 is the geothermal ear 4 arranged, which is approximately adjacent to the thighs 22 . 24 extends substantially parallel to these. The axial lengths of the legs 22 . 24 and the geothermal ear 4 are in the 1 approximately the same, although it is conceivable that, for example, the legs 22 . 24 or the geothermal ear 4 have a different length. The probe 2 and the geothermal ear 4 are over a plurality of axially spaced ribbons 28 firmly gripped and thereby force and positively connected with each other. As a band 28 For example, a conventional cable tie can be used. Through this connection are the probe 2 and the geothermal ear 4 easy to use in a hole together.

The probe 2 has at its projecting from the well bore and the connecting element 26 groundbreaking end area 29 a probe inlet and a probe outlet 30 . 31 on.

The probe 2 is used to cool water from the main circuit, especially in summer. The secondary circuit forming probe 2 is directly connectable to the main circuit, bringing the probe 2 or the secondary circuit contains the same medium as the main circuit, namely water. To connect the two circuits, a hydraulic valve - for example, a 4/2-way valve - used.

When connected secondary and main circuit promotes the main circuit associated heating pump water through both circuits. The heat of rooms of the building is absorbed by the water flowing through the radiator connected to the main circuit. The heated water then passes through the probe inlet 30 in the in 1 left thigh 22 the probe 2 and is in the direction of a Bohrungsgrunds or the connecting element 26 and about this to the thigh 24 promoted. About the probe outlet 31 the water then passes from the thigh 24 back to the main circuit. When the water flows through the probe 2 the heat is given off to the ground that limits the borehole.

In winter or when heating a building through the main circuit, the secondary circuit of the probe 2 disconnected, in which the connection via the hydraulic valve between the main and secondary circuit is interrupted

In particular, in winter at low temperatures, a freezing of the water in the probe 2 to prevent is the geothermal ear 4 provided with a constant heat flow to the probe 2 also to the projecting from the well bore end portion 27 he follows. To illustrate the temperatures of the geothermal ear 4 does that serve in the 2 shown temperature-time diagram.

2 shows a graph with a plotted on the ordinate temperature in ° C and a time plotted on the abscissa in hours and minutes to illustrate the performance of the geothermal ear 4 ,

The in the 2 top curve 32 shows a storage temperature 32 a water reservoir of the main circuit or heating circuit of the building. An ambient temperature 34 , which are in the region of the protruding from the ground end portion 27 the probe 2 out 1 is measured, the curve shows 34 , Furthermore, in the diagram, a heating zone temperature 36 and a cooling zone temperature 38 shown, where the heating zone temperature 36 on an outer wall of the geothermal ear 4 in a lower heating zone of the borehole and the cooling zone temperature 38 on an outer wall of the pressure pot 10 assigning end portion of the geothermal ear 4 out 1 is measured. A soil temperature 40 is considered as a horizontal line in the diagram in 2 is shown and is substantially 10 ° C.

The time period plotted on the abscissa is about 5 × 24 hours. The ambient temperature 34 moves during the first 48 hours approximately between 5 and 10 ° C, then rises above 10 ° C and then drops to about 5 ° C from.

The geothermal ear 4 assigned heat pump is switched off after 48 hours, which is evident from the fact that the storage temperature 32 drops from about 30 ° C. Likewise, the cooling zone temperature increases 38 from about 6 ° C to over 10 ° C, as the evaporator 6 out 1 is no longer in operation. The heating zone temperature 36 rises in contrast to the cooling zone temperature 38 less intense after the first 48 hours since it is located in the cooled area of the well. The heating zone temperature 36 then approaches the soil temperature 40 , which is 10 ° C, slowly on.

Shortly after 48 hours, ie after switching off the heat pump, the cooling zone temperature is the same 38 about the ambient temperature 40 to, but in the last 24 hours then significantly above the ambient temperature 34 with a temperature difference of about 2 ° C to the heating zone temperature 36 - with changing ambient temperature 24 - stay constant. This shows that from the heating zone, which is about 10 ° C, there is constant heat to the cooling zone, which is about 7 ° C, via the CO ₂ in the geothermal ear 4 out 1 is promoted, bringing the cooling zone temperature 38 will keep constant while the ambient temperature 34 continues to cool to about 5 ° C and below.

This heating effect of the geothermal ear 4 out 1 from the heating zone to the cooling zone shows that a constant heating by the automatic heat transport of working even without heat pump operation geothermal pipe 4 he follows. The constant temperature of the geothermal ear 4 in the area of the cooling zone then serves to heat the end region 27 the probe 2 so that in the probe 2 ent kept water does not freeze. A water-salt mixture in the probe 2 Frost protection is therefore no longer necessary.

Disclosed is a probe device that is at least partially in has a well bore inserted probe. The probe, which is a secondary circuit is then associated with a main circuit that is for cooling or heating, in particular a building, is used, in operative connection. The secondary circuit of the probe contains Water that can be heated with a heating element, especially in winter is. Through the water, the secondary circuit can directly be connected to the main circuit.

LIST OF REFERENCE NUMBERS

1

probe device

2

probe

4

geothermal pipe

6

Evaporator

8th

connection

10

pressure cooker

12

condensation chamber

14

coiled tubing

16

coiled tubing

18

input port

20

output port

22

leg

24

leg

26

connecting element

28

tape

29

end

30

probe inlet

31

probe sequence

32

storage temperature

34

ambient temperature

36

heating zone

38

Cooling zone temperature

40

ground temperature

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 202008008351 U1 [0024]
• - DE 28924676 U1 [0025]
• - DE 10327602 A1 [0025]

Claims (10)

Probe device, the at least one at least partially inserted into a well bore probe ( 2 ), which is in operative connection via a secondary circuit with a main circuit, wherein the main circuit for cooling or heating, in particular a building, serves, characterized in that the secondary circuit of the probe ( 2 ) Contains water, which is provided with a heating element ( 4 ) is heated. Probe device according to claim 1, wherein the heating element ( 4 ) one adjacent to the at least one probe ( 2 ) arranged geothermal ear ( 4 ). Probe device according to claim 1 or 2, wherein the Secondary circuit with the main circuit containing water is directly connectable. Probe device according to claim 2 or 3, wherein the at least one probe ( 2 ) is approximately U-shaped and wherein between two legs ( 22 . 24 ) of the probe the geothermal ear ( 4 ) is arranged approximately parallel thereto. Probe device according to one of claims 2 to 4, wherein the geothermal tube ( 4 ) at least in sections on the probe ( 2 ) is present. Probe device according to one of claims 2 to 5, wherein the probe ( 2 ) with the geothermal ear ( 4 ) Force, substance and / or positively connected. Probe device according to claim 6, wherein the probe ( 2 ) together with the geothermal ear ( 4 ) in the axial direction of a plurality of mutually spaced bands ( 28 ) is encompassed. Probe device according to one of the preceding claims, wherein the probe ( 2 ) consists essentially of polyethylene. Probe device according to one of claims 2 to 8, wherein the geothermal tube ( 4 ) is a component of a heat pump system, and wherein a refrigerant in the Erdwärmerohr ( 4 ) CO ₂ is. Probe device according to one of the preceding claims, wherein a flow of the secondary circuit of the probe ( 2 ) is generated via a heating water pump of the main circuit.

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