Intermittently operating sorption apparatus with solid sorbent for heat and cold storage

• US 4,713,944 A
• Filed: 09/08/1986
• Issued: 12/22/1987
• Est. Priority Date: 09/09/1985
• Status: Expired due to Fees

• Current Assignee: Schiedel GmbH & Company
• Original Assignee: Schiedel GmbH & Company
• Inventors: Januschkowetz, Gerhard
• Primary Examiner(s): King, Lloyd L.
• Application Number:
  US06/904,649
• Time in Patent Office: 470 Days
• Field of Search: 62/106, 62/119, 62/235.1, 62/480, 62/239
• US Class Current: 62/480
• CPC Class Codes: F25B 17/08 the absorbent or adsorbent being a solid, e.g. salt F25B17/12 takes precedence
• CPC Class Codes: F28D 20/003 using thermochemical reactions
• CPC Class Codes: Y02A 30/27 Relating to heating, ventilation or air conditioning [HVAC] technologies
• CPC Class Codes: Y02B 30/62 Absorption based systems
• CPC Class Codes: Y02E 60/14 Thermal energy storage

Abstract

Intermittently operating sorption head and cold storage apparatus having a storage vessel forming a first structural unit. The storage vessel comprises a gas-tight housing and a solid sorption agent which can be heated by a heating medium and is thermally conductively in communication with a heat-eliminating heat-exchange fluid by a first heat-exchanger. The apparatus also has a second heat-exchanger defining at least one of an evaporator and a condenser forming a second structural unit and having a pressure-resistant housing. This unit is thermally conductively in communication by a second heat-exchange device with a heat-exchange fluid capable of eliminating heat in the condensation phase or suppling heat in the evaporation phase. The apparatus also has a pressure-resistant external flow connection for a working medium carried in a closed system between the two structural units. The first structural unit is thermally insulated and the first heat-exchange means has a pressure-resistant conduit embedded in the solid. The second structural unit is thermally insulated and the second heat-exchanger has a pressure-resistant conduit surrounded by the thermal insulator. The flow connection between the storage vessel and the second heat-exchanger is of a low heat conductivity material. Valves for controlling the heat-exchange fluids are also provided.

Claims

1. An intermittently operating sorption apparatus for heat and cold storage comprising

a thermally insulated storage vessel comprising

a gas-tight housing and a mass of solid sorption agent contained therein,

a heating means capable of heating the solid sorption agent, and

a first heat-exchange means comprising a first pressure-resistant conduit;

a second heat-exchange means defining at least one of a thermally insulated evaporator and a condenser, said heat-exchange means comprising a second pressure-resistant conduit;

means for placing said first and second conduits in flow communication with one another;

separate in- and out-flow control devices operatively connected to said second conduit;

a mass of working medium of a substance capable of being in the liquid state; and

connecting means defining pressure-resistant and poorly heat-conducting connections for conducting the working medium between said storage vessel and said second heat-exchange means.

2. The sorption storage apparatus of claim 1, wherein

the storage vessel is provided as a first structural unit;

and

the evaporator and the condenser are provided as a combined evaporator/condenser as a second structural unit.

3. The sorption storage apparatus of claim 1, wherein

the storage vessel is provided as a first structural unit;

the evaporator is provided as a second structural unit comprising the second heat-exchange means; and

the condenser is provided as a third structural unit comprising a third heat-exchange means having a third pressure-resistant conduit;

wherein separate in- and out-flow devices are operatively connected to each of said second and third conduits.

4. The sorption storage apparatus of claim 1, wherein

the housing of the storage vessel is structurally supported by the mass of solid-sorption agent contained therein.

5. The sorption storage apparatus of claim 1, wherein

the first pressure-resistant conduit is embedded in the solid sorption agent;

and

the heating means includes means for carrying a heating fluid.

6. The sorption storage apparatus of claim 5, wherein

the first heat-exchange means of the storage vessel and the heating means are provided separately.

7. The sorption storage apparatus of claim 5, wherein

the first heat-exchange means and the heating means of the storage vessel are provided as one unit.

8. The sorption storage apparatus of claim 7, wherein

the first heat-exchange means and the heating means of the storage vessel have separate conduits and have a common ribbing.

9. The sorption storage apparatus of claim 1, wherein

the storage vessel comprises a plurality of first heat-exchange means, said first heat-exchange means being connected in parallel to each other;

and

each first heat-exchange means is in flow communication with the second heat-exchange means.

10. The sorption storage apparatus of claim 9, further comprising

means for independently actuating each of the plurality of first heat-exchange means.

11. The sorption storage apparatus of claim 9, wherein

the plurality of first heat-exchange means are contained in a common thermally insulated storage vessel housing.

12. The sorption storage apparatus of claim 9, wherein

each first heat-exchange means has a separate thermally insulated housing.

13. An intermittently operating sorption storage apparatus, comprising

at least three sorption storage apparatuses of claim 1 coupled to one another in a phase-shifted manner, thereby permitting a quasi-continuous mode of operation.

14. A vehicle air conditioning apparatus, comprising the sorption storage apparatus of claim 13, wherein

the heating means is a device heated by fuel combustion gases of the vehicle engine.

15. The sorption storage apparatus of claim 1, wherein

the second heat-exchange means has separate conduits for a first heat-exchange means fluid capable of withdrawing heat and a second heat-exchange means fluid capable of supplying heat.

16. The sorption storage apparatus of claim 1, wherein

the connecting means between said storage vessel and said second heat-exchange means is short and made from a material having low thermal conductivity.

17. The sorption storage apparatus of claim 16, wherein

the material of the connecting means comprises a glass or ceramic material.

18. The sorption storage apparatus of claim 1, wherein

the connecting means between said storage vessel and said second heat-exchange means is made from a thinwalled metal material having low thermal conductivity.

19. The sorption storage apparatus of claim 18, wherein

the material of the connecting means is a nickel-chromium steel.

20. The sorption storage apparatus of claim 1, further comprising

pumping means provided for pumping liquid heat-exchange means fluid out of the first conduit of the storage vessel prior to the beginning of a desorption phase, and wherein

the second conduit conducts a heat-withdrawing heat-exchange fluid, said fluid being capable of undergoing a phase transition from the liquid to the gaseous phase throughout the operation of the apparatus.

21. The sorption storage apparatus of claim 20, wherein

the heat-withdrawing heat-exchange means fluid is water.

22. The sorption storage apparatus of claim 20, wherein

a valve means is provided at the outlet of the first heat-exchange means of the storage vessel.

23. The sorption storage apparatus of claim 1, wherein

the second conduit is arranged to conduct a heat-withdrawing heat-exchange fluid, said fluid continuously filling the first heat-exchange means and being capable of remaining in liquid phase throughout the operation of the apparatus.

24. The sorption storage apparatus of claim 1, further comprising

a cold-consumer or absorber;

and

a heat-consumer or absorber; and

wherein

the second heat-exchange means is an evaporator,

the second conduit and the cold-consumer are in flow communication, and

the first conduit of the first heat-exchange means and the heat-consumer or absorber are in flow communication.

25. The sorption storage apparatus of claim 24, wherein

the second conduit of the second heat-exchange means is arranged to conduct a heat-eliminating fluid and is in flow communication with the heat consumer or absorber.

26. The sorption storage apparatus of claim 24, wherein the heat-consumer or absorber is a hot-water heater.

27. The sorption storage apparatus of claim 1, further comprising

a supply vessel for a liquid heat-exchange fluid, wherein the first conduit of the first heat-exchange means of the storage vessel is in flow communication with the supply vessel.

28. The sorption storage apparatus of claim 27, wherein

the supply vessel is a water boiler.

29. The sorption storage apparatus of claim 27, further comprising

a by-pass conduit capable of by-passing the supply vessel and connecting the inlet of the first conduit of the first heat-exchange means with the outlet of the second conduit of the second heat-exchange means, said by-pass conduit capable of withdrawing the heat-eliminating fluid from the first heat-exchange means.

30. The sorption storage apparatus of claim 1, further comprising

a gas exhaust pump means connected to the connecting means conducting the working medium.

31. The sorption storage apparatus of claim 1, further comprising

a gas overpressure valve means connected to the connecting means conducting the working medium.

32. The sorption storage apparatus of claim 30, wherein

said pump means is a water jet pump.