DE102004049412A1 - A method for air conditioning a building by means of an absorption hydraulic circuit has a storage tank incorporated to allow for the intermittent operation of the system - Google Patents

Abstract

A heating source (7) imparts thermal energy through a heat exchanger (1) to a thermal transfer circuit (5) and heat exchanger (2) within the absorption material (4) and a pump (14) into a building. During intermittent off periods the heat is stored in a reservoir (6).

Description

The The invention relates to a vacuum sorption device according to the preamble of claim 1

Such a vacuum sorption device comprise a heat source designed, for example, as a burner with a first heat exchanger and a sorber consisting of a sorbent (for example zeolite) and a second heat exchanger, which adsorbs or desorbs a refrigerant periodically. In this regard is on the DE 103 10 748 B3 and the DE 199 02 695 A1 referenced, in both cases, the heat exchangers for heat transfer from the burner to the sorber are connected to one another via a filled with a liquid heat transfer medium heat transfer circuit.

in the Case, that the heat carrier cycle the vacuum sorption device directly with a heating circuit a building is connected, there is no hydraulic separation between them both circuits, d. H. there is no regular third heat exchanger in the heat transfer circuit. In the case that the heat carrier cycle the vacuum sorption device only indirectly with a heating circuit of a building is connected, a hydraulic separation by means of a third heat exchanger realized, the heat transfer circuit and thermally interconnects the heating circuit.

There Such vacuum sorption devices, as mentioned above, periodically work and in particular the temperature of the heat transfer medium (heat transfer medium) changes results the disadvantage that this during of the periodic operation must be heated or cooled. hereby learns the process a loss the efficiency.

Of the Invention is therefore the object of a vacuum sorption the type mentioned on kon structurally simple way this Deterioration of the efficiency exclude or at least reduce.

These Task is with a vacuum sorption of the aforementioned Type by the features listed in the characterizing part of patent claim 1 solved.

To The invention is therefore intended that the heat transfer circuit with a phased lockable Memory provided for the intermediate storage of a subset of the heat transfer medium is. This in a sense memory designed as a buffer takes or depends on the respective operating phase exergetically "valuable" energy up or down. This will the proportion of supplied High-temperature heat reduced overall, which increases the efficiency of such a system.

With in other words, is thus provided, the sorber at the end of a desorption over a suitable actuator to connect with a buffer memory. hereby the memory contents are heated, until the sorber and the contents of the cache approximate at the same temperature level. Then the connection will be separated between sorber and buffer. The cache lingers on the then existing temperature level, while - related on the onset of adsorption - then "pre-cooled" sorber with a Heat absorbing Medium is connected.

Analogous the adsorption phase develops. At the end of this phase, at the the sorber gives off heat, This is the heat-absorbing Medium separated and connected to the buffer memory. The sorber will then by that on higher Temperature level located heat transfer medium heated in the buffer, and until both components at approximately the same temperature level are located. After that, the buffer is separated from Sorber. The for the subsequent one Desorption phase required energy is dissipated by the heat heat source provided.

Other advantageous developments emerge from the dependent claims.

The Vacuum sorption device according to the invention including their advantageous developments according to the dependent claims will be below Based on the graphic representation of two preferred embodiments explained in more detail.

It shows each schematically

1 the vacuum sorption device according to the invention, in which the heat transfer circuit simultaneously forms the heating circuit; and

2 the vacuum sorption device according to the invention, are separated from each other in the heat transfer and heating circuit by means of a heat exchanger.

In the 1 and 2 are two different dene embodiments of the vacuum sorption device according to the invention shown. Both have in common is that they are preferably designed as a gas burner heat source 7 with a first heat exchanger 1 one of a sorbent (preferably zeolite) and a second heat exchanger 2 existing, periodically a refrigerant ad- or desorbing sorber 4 and one filled with a heat transfer medium, the heat exchanger 1 . 2 interconnecting heat transfer circuit 5 exhibit.

Essential to the invention for both embodiments is now that the heat transfer circuit 5 with a phase-lockable memory 6 is provided for temporarily storing a subset of the heat transfer medium. As described above, with the help of this buffer memory exergetically valuable energy can be cached.

To further increase the efficiency is provided that the memory 6 has a volume, the same size the same content of the heat carrier circuit 5 is. This proviso ensures that only a smaller, unavoidable share of heat transfer medium participates in the temperature increase.

Furthermore, the efficiency of the device is particularly good to increase, in the memory 6 feeding at the end of a desorption phase exergetic high-quality heat transfer medium and by the memory 6 At the end of an adsorption phase exergetic high-quality heat transfer medium can be discharged. This is the memory 6 in the meantime, of course, not empty, but filled with exergetisch less valuable heat transfer medium. In this way, the exergetically valuable energy is cached particularly effectively.

As explained above, in the embodiment according to 1 be advantageously provided that preferably with a pump 14 provided heat transfer circuit 5 hydraulically direct, the heat transfer medium shared with a heating circuit 8th connected to a building. Here are the heat transfer circuit 5 and the heating circuit 8th at two interfaces 9 . 10 connected with each other.

Alternatively, it is provided, and this shows 2 that preferably with a pump 14 provided heat transfer circuit 5 thermally via a third heat exchanger 3 - And thus hydraulically separated - with a preferably also with a pump 14 provided heating circuit 8th connected to a building. In this case, it is provided that the heat transfer circuit 5 and the third heat exchanger 3 at two interfaces 9 . 10 connected to each other.

For the phased connection of the memory 6 with the two interface 9 . 10 is advantageously provided (and this applies to both 1 as well as for 2 ) that this two connectors 11 . 12 having. The connections 11 . 12 serve to supply and discharge of exergetic high-quality heat transfer medium in and out of the memory 6 (In the meantime, the storage is again not empty, but filled with exergetically less valuable heat transfer medium). To the loading and unloading of the store 6 To make targeted, is at least one of the connections 11 . 12 with a valve 13 , preferably provided with a three-way valve. This valve is (not shown) selectively actuated phase by phase via a corresponding control of the device.

1

heat exchangers

2

heat exchangers

3

heat exchangers

4

sorber

5

Heat transfer circuit

6

Storage

7

heat source

8th

heating circuit

9

interface

10

interface

11

connection

12

connection

13

Valve

14

pump

Claims (10)

Vacuum sorption device comprising a heat source ( 7 ) with a first heat exchanger ( 1 ), one of a sorbent and a second heat exchanger ( 2 ), periodically a refrigerant ad- or desorbing sorber ( 4 ) and one filled with a heat transfer medium, the heat exchanger ( 1 . 2 ) interconnecting heat transfer circuit ( 5 ), characterized in that the heat transfer medium ( 5 ) with a phase-lockable memory ( 6 ) is provided for temporarily storing a subset of the heat transfer medium. Vacuum sorption device according to claim 1, characterized in that the memory ( 6 ) has a volume which is greater than or equal to the content of the heat transfer medium circuit ( 5 ). Vacuum sorption device according to claim 1 or 2, characterized in that the memory ( 6 ) at the end of a desorption phase heat transfer medium can be fed and that from the memory ( 6 ) at the end of an adsorption heat transfer medium is discharged. Vacuum sorption device according to one of claims 1 to 3, characterized in that the heat transfer medium ( 5 ) hydraulically directly, the heat transfer medium shared with a heating circuit ( 8th ) is connected to a building. Vacuum sorption device according to claim 4, characterized in that the heat carrier circuit ( 5 ) and the heating circuit ( 8th ) at two interfaces ( 9 . 10 ) are interconnected. Vacuum sorption device according to one of claims 1 to 3, characterized in that the heat transfer medium ( 5 ) thermally over a third heat exchanger ( 3 ) - hydraulically separated - with a heating circuit ( 8th ) is connected to a building. Vacuum sorption device according to claim 6, characterized in that the heat carrier circuit ( 5 ) and the third heat exchanger ( 3 ) at two interfaces ( 9 . 10 ) are interconnected. Vacuum sorption device according to claim 5 or 7, characterized in that the memory ( 6 ) for the phased connection with the two interfaces ( 9 . 10 ) two connections ( 11 . 12 ) having. Vacuum sorption device according to claim 8, characterized in that at least one of the connections ( 11 . 12 ) with a valve ( 13 ), preferably a three-way valve. Vacuum sorption device according to one of claims 1 to 9, characterized in that the heat source ( 7 ) is designed as a gas burner.