Dual-temperature heat pump apparatus and system

• US 5,360,057 A
• Filed: 09/09/1991
• Issued: 11/01/1994
• Est. Priority Date: 09/09/1991
• Status: Expired due to Term

• Current Assignee: Rocky Research (Honeywell International Inc.)
• Original Assignee: Rocky Research (Honeywell International Inc.)
• Inventors: Rockenfeller, Uwe, Kirol, Lance D.
• Primary Examiner(s): DAVIS JR, ALBERT
• Application Number:
  US07/756,445
• Time in Patent Office: 1,149 Days
• Field of Search: 165/104.12, 62/480, 62/478
• US Class Current: 165/104.12
• CPC Class Codes: F25B 17/083 with two or more boiler-sorbers operating alternately
• CPC Class Codes: F25B 27/02 using waste heat, e.g. from internal-combustion engines
• CPC Class Codes: F25B 29/006 of the sorption type system
• CPC Class Codes: Y02A 30/27 Relating to heating, ventilation or air conditioning [HVAC] technologies
• CPC Class Codes: Y02A 30/274 using waste energy, e.g. from internal combustion engine
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]
• CPC Class Codes: Y02B 30/625 combined with heat or power generation [CHP], e.g. trigeneration

Abstract

Apparatus for simultaneously supplying heating and cooling or refrigeration comprises first and second reactors each containing a complex compound of a metal salt and a gaseous refrigerant adsorbed thereon, a condenser, refrigerant conduit means for directing the refrigerant to and from the condenser and reactors, and fluid conduit means for directing heat transfer fluid in heat exchange communication with the condenser and selectively with the reactors. In another embodiment each reactor contains a different salt and instead of a condenser, energy is recovered through heat exchange fluid in heat exchange communication with the reactors.

Claims

1. Apparatus for simultaneously supplying heating and cooling or refrigeration, comprising:

first and second reactors, each containing a reactant comprising a complex compound of a metal salt selected from the group consisting of a metal oxide, halide, nitrate, nitrite, sulfate, oxalate and sulfide and mixtures and compounds thereof, wherein the metal is selected from the group consisting of alkali metal, alkaline earth metal, transition metal, aluminum, zinc, cadmium and tin, and a gaseous refrigerant adsorbed thereon selected from the group consisting of ammonia, water, sulfur dioxide, lower alkanol, alkanolamine, polyamine and phosphine, or a metal carbonate comprising a reaction product of said metal oxide and carbon dioxide gaseous refrigerant,

a condenser for condensing said gaseous refrigerant;

a first refrigerant conduit assembly for directing said gaseous refrigerant alternately to said first and second reactors, respectively, a second refrigerant conduit assembly for directing gaseous refrigerant alternately from said first and second reactors, respectively, to said condenser, and a third refrigerant conduit assembly for directing condensed gaseous refrigerant from said condenser to refrigerant condensate receiving means,

heating means for heating said complex compound or said metal carbonate alternately in said first and second reactors, respectively, and heat extraction means including a first heat exchanger for providing heat exchange communication between said condenser and said first and second reactors for extracting heat from said complex compounds carbonate alternately in said first and second reactors, respectively, and

a first fluid conduit assembly for directing a heat transfer fluid in heat exchange communication with said condenser and said heat extraction means whereby said heat transfer fluid becomes heated by said heat exchange communication, and a second fluid conduit assembly for directing said heated heat transfer fluid from said condenser to receiving means therefor.

2. Apparatus of claim 1, including a liquid subcooler cooperating with said third refrigerant conduit assembly and wherein said third refrigerant conduit assembly directs condensed gaseous refrigerant from said condenser to said subcooler and from said subcooler to said refrigerant condensate receiving means.

3. Apparatus of claim 2, including a second heat exchanger for providing heat exchange communication between said second refrigerant conduit assembly and said second fluid conduit assembly, and wherein said first and second fluid conduit assemblies cooperate to direct said heat exchange transfer fluid successively to said subcooler, said condenser and said second heat exchanger for increasingly heating said heat transfer fluid.

4. Apparatus of claim 3 wherein said first fluid conduit assembly directs a first heat transfer fluid to said first heat exchanger and from said heat exchanger to said condenser, said apparatus including a third fluid conduit assembly for directing a second heat transfer fluid from said first and second reactors to said first heat exchanger, and wherein said first and second heat transfer fluids are in heat exchange communication in said first heat exchanger.

5. Apparatus of claim 3 wherein said second and third refrigerant conduit assemblies cooperate to direct said gaseous refrigerant successively to said second heat exchanger, said condenser and said subcooler for increasingly cooling said refrigerant.

6. Apparatus of claim 5 including means for simultaneously recovering heat from the heated heat transfer fluid and recovering cooling from the cooled refrigerant.

7. Apparatus of claim 2, including a second heat exchanger for providing heat exchange communication between said second refrigerant conduit assembly and said second fluid conduit assembly, and wherein said second and third refrigerant conduit assemblies cooperate to direct said gaseous refrigerant successively to said second heat exchanger, said condenser and said subcooler for increasingly cooling said refrigerant.

8. Apparatus of claim 7 wherein said first fluid conduit assembly directs a first heat transfer fluid to said first heat exchanger and from said first heat exchanger to said condenser, said apparatus including a third fluid conduit assembly for directing a second heat transfer fluid from said first and second reactors to said first heat exchanger, and wherein said first and second heat transfer fluids are in heat exchange communication in said first heat exchanger.

9. Apparatus of claim 1, including a second heat exchanger for providing heat exchange communication between said second refrigerant conduit assembly and said second fluid conduit assembly.

10. Apparatus of claim 1, including control means cooperating with said heating means and said heat extraction means for heating said reactant in one of said first or second reactors while simultaneously extracting heat from said reactant in the other of said first or second reactors.

11. Apparatus of claim 10, wherein said heating means comprises means for directing a first heat transfer fluid to and from said first and second reactors, and wherein said apparatus includes a third fluid conduit assembly for directing a second heat transfer fluid to said heat extraction means from said first and second reactors.

12. Apparatus of claim 11, wherein said first heat exchanger provides heat exchange communication between said first and said second heat transfer fluids.

13. Apparatus of claim 1 wherein said reactant comprises CaCl₂ ·

2-4(NH₃) or CaCl₂ ·

4-8(NH₃).

14. Apparatus of claim 1 wherein said reactant comprises SrCl₂ ·

1-8(NH₃) or SrBr₂ ·

0-8(NH₃).

15. Apparatus of claim 1 wherein said reactant comprises CaBr₂ ·

2-6(NH₃).

16. Apparatus of claim 1 wherein said reactant comprises CoCl₂ ·

2-6(NH₃).

17. Apparatus of claim 1 wherein said reactant comprises NiCl₂ ·

2-6(NH₃).

18. Apparatus of claim 1 wherein said reactant is FeCl₂ ·

2-6(NH₃).

19. Apparatus of claim 1 wherein said reactant is NaBF₄ ·

0.5-2.5(NH₃).

20. Apparatus of claim 1, wherein said refrigerant is ammonia.

21. Apparatus of claim 1, wherein said heat transfer fluid is water.

22. A thermal energy storage system comprising an apparatus of claim 1 and liquid refrigerant storage means for receiving and holding liquid refrigerant.

23. A system of claim 22, including heat transfer fluid storage means for receiving and holding heated heat transfer fluid.

24. Apparatus of claim 1 wherein said first fluid conduit assembly directs a first heat transfer fluid to said first heat exchanger and from said first heat exchanger to said condenser, said apparatus including a third fluid conduit assembly for directing a first heat transfer fluid from said first and second reactors to said first heat exchanger, and wherein said first and second heat transfer fluids are in heat exchange communication in said first heat exchanger.

25. Apparatus of claim 1 including means for simultaneously recovering cooling from said refrigerant condensate receiving means and recovering heat from the heated heat transfer receiving means.