DE3112970A1 - Heat exchanger for gaseous media - Google Patents

Abstract

The invention proposes a regenerative heat exchanger which can be used, in particular, in agricultural operations and in this case permits the recovery of the heat present in the exhaust air of stall systems by arranging that a rotating exchanger wheel made from a material of high thermal conductivity is heated by the exhaust air, but releases its heat while rotating to an exchanger medium which is kept colder than the exhaust air and which is connected to a heat recovery system, i.e. a heat pump.

Description

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Schniedergers, Gregor, Hörstrasse 23, 4441 Schapen

"Heat exchanger for gaseous media"

The invention relates to regenerative heat exchange

i.e. a heat exchanger in which the heat transfer is not I.

ί solely through the temperature difference between waste heat and additional heat! with the heat pump circuit is effective, but also a heat treatment \ takes place at the, for example by electric motor cooling compressor '\, etc.

In the publication "AEL, heat exchangers for use in stables, leaflet 18 / 198o", the use of heat exchangers in agricultural sector, including a system as a regenerative heat exchanger, in which a rotating wheel is provided as an exchanger wheel, which on the one hand from the cold outside air, on the other hand from the warm exhaust air is flowed against, where due to the heat transfer now the cold outside air is heated and the warm exhaust air is cooled. at Such systems have the problem that the exhaust air is heavily polluted and contains corrosive media, so that one stood Cleaning the facility is required. In addition, special high-pressure cleaners with a spray lance are required.

The cleaning water and the condensate must be collected and drained. leads, although a complete cleaning of the

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location is not possible, so that in the course of time such facilities decrease significantly in terms of their heat transfer efficiency.

The invention is based on the object of a heat recovery ^ To create a system that, on the one hand, ensures the most extensive possible exchange of heat energy to a. Exchange medium takes care, on the other hand, it is easy to keep clean and, finally, no special precautions are required to collect condensate water and derive.

This object on which the invention is based is achieved by the measures mentioned in the claims, in particular by that a exchanger wheel is arranged in a container, which consists of lamellae through which gas flows, which are capable of absorb energy supplied by the gaseous medium and transfer it to an exchanger medium when the exchanger wheel rotates, which is arranged in the same box-shaped container. The exchanger medium is known per se with a heat pump Way connected.

The gaseous medium to be cooled is fed to the interior of the exchanger wheel via a radial conveyor and leaves the exchanger wheel at its circumference, the exchanger wheel with its revolving Axis is arranged parallel to the surface of the exchange medium and during its circulation in the exchange medium, preferably water, immerses and gives off its warmth, but also at the same time

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is cleaned, so that a safe heat transfer is always achieved automatically when the system is in operation, on the other hand, at the same time the accumulation of the condensate that forms does not lead to difficulties and the accumulation of dust is prevented.

The device according to the invention is simple to manufacture and has features compared to those which also belong to the prior art so-called glass tube heat exchangers have the advantage that damage is as good as impossible. In addition, there is the advantage that the device according to the invention can be delivered pre-installed as a closed unit and before each ventilation shaft of a stable od. The like. Can be installed in the simplest way.

Since the drive of the exchanger wheel is independent of the drive of the fan, any speed of the exchanger wheel is possible adjustable, which is preferably based on the temperature difference between the exchange medium and the exhaust air.

Further advantageous refinements of the invention are defined in the subclaims.

An exemplary embodiment of the invention is explained below with reference to the drawing. The drawing shows in

Fig. 1 is a front view of the egg according to the invention

direction with breaking away of the front wall of the

Container and in

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FIG. 2 shows a section along the line A - B in FIG.

In the drawing, 1 denotes a box-shaped container to which an exchange wheel 2 surrounds a. Axis 3 is arranged circumferentially.

The exchanger wheel is driven by a separate motor drive 4, for example by a V-belt seam

The box-shaped container 1 is open at its top, while it is closed at its bottom and in this Area receives an exchange medium, which is generally designated by 5, for example, can consist of water. The height the water level of the exchange medium 5 is shown in the drawing with "WS".

A radial fan is arranged in the center of the exchanger wheel 2, which bears the reference number 6 and to which the warm air to be cooled is supplied in the direction of arrow F.

The actual exchanger wheel 2 consists of a plurality of concentrically arranged lamellae 7, which consist of a There are good conductive material and leave flow openings 8 between them, so that in the center of the exchanger wheel supplied gaseous medium to be cooled has heated the slats after flowing through the opening 8 and on the top of the box Shaped container can flow in the direction of arrow F ".

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In the lower part of the box-shaped container, a line coil 9 is arranged below the exchanger wheel 2, which in connection with a heat pump. Instead of the simple U-shaped line, it is of course possible here, too a very extensive, having a large exchange surface Snake 9 to be provided.

The operation of the device according to the invention is as follows

The medium to be supplied, for example the exhaust air from a stable, is transported into the interior of the exchanger wheel 2 via the radial fan 6 guided and flows through the box-shaped container 1 after at the top in the direction of arrow F- and in the process gives off its heat to the lamella 7 arranged in this upper region of the box-shaped container. Since the exchanger wheel 2 is also driven is now immersed the so heated lamellae of the exchanger wheel 2 in the medium 5 and give, as this medium is colder than the exhaust air, the stored heat is transferred to the medium, whereby the cooling machine keeps the medium cool Heat pump takes place.

When the lamellae 7 of the exchanger wheel 2 are immersed in the medium these slats are cleaned automatically, so that an effect. get rid of them automatically by soiling the exchanger fins is turned off.

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The speed of rotation of the exchanger wheel is regulated as a function of the heat transfer coefficients, so that care is taken is that, on the one hand, as extensive a heating as possible Lamellae in the upper part of the box-shaped container takes place, on the other hand, a complete release of the heat from the fins to the exchanger medium 5.

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Claims (8)

PATENT ADVOCATE -... '..;,'. ^; 'post box sm · D- 4400 MÜNSTER 31.o3. 1901 IK_l / ~ IJ Γ · LJADDC! "ON THE CANNON (JRAEEn 11 -TELEPHONE J02S1) 4Z931 -INC /. H.-t /. HABJJtL telex e «o» 7i..B.d MY ALCTE MEINItAKfE- ".. ο / QO-SC (please specify) S1o8 / 8235 U / Sc Schniedergers, Gregor, Hörstrasse 23, 4441 Schapen "Heat exchanger for gaseous media" Patent claims: Heat exchanger for gaseous media for a heat recovery system, characterized by a box-shaped container (1), a rotatingly driven turbocharger wheel (2) arranged in the box-shaped container, which essentially consists of a large number of highly heat-conducting, lamellar-shaped and thus air-permeable metal strips (7 ), which run in the circumferential direction of the wheel, an exchanger medium (5) arranged in the lower part of the box-shaped container (1) and one with the exchanger medium (5) J I - 2 - related Wärmepumpenleitimg (9), wherein the axis (3) revolving around the exchanger wheel (2) is parallel runs to the surface of the exchange medium and at a distance from the surface of the exchange medium (5) lies. 2. Heat exchanger according to claim 1, characterized by the gaseous medium in the interior of the exchange; wheels leading conveyor (6). : 3. Heat exchanger according to claim 2, characterized in that the conveying device is designed as a radial fan (6). 4. Heat exchanger according to one or more of the preceding claims, characterized in that the lamellae (7 of the exchanger wheel (2) consist of sheet copper strips! 5. Heat exchanger at least according to claim 1, characterized in that the exchange medium (5) is formed by water. 6. Heat exchanger according to claim 4, characterized in that the copper fins (7) are provided with a highly thermally conductive, corrosion-preventing protective layer. * I I t. - 7. Heat exchanger according to one or more of the preceding claims, characterized / that the box-shaped container (1) is equipped with an inlet and outlet opening which easily enables the exchange medium to be changed. 8. Heat exchanger according to one or more of the preceding claims, characterized in that the exchanger wheel can be set in a rotating movement by a separate drive (4). 9- Heat exchanger according to claim 8, characterized in that the drive (4) of the exchanger wheel (2) is formed by a belt drive. 1o. Heat exchanger according to one or more of the preceding claims, characterized in that the heat exchanger fins of the exchanger wheel (2) are arranged concentrically to one another in several annular tracks and have flow openings (8) between them for the gaseous medium fed to the center of the exchanger wheel.