EP0105603A2 - Tandemwärmepumpe - Google Patents

Tandemwärmepumpe Download PDF

Info

Publication number
EP0105603A2
EP0105603A2 EP83305035A EP83305035A EP0105603A2 EP 0105603 A2 EP0105603 A2 EP 0105603A2 EP 83305035 A EP83305035 A EP 83305035A EP 83305035 A EP83305035 A EP 83305035A EP 0105603 A2 EP0105603 A2 EP 0105603A2
Authority
EP
European Patent Office
Prior art keywords
heat
heat pump
condenser
pump
adsorption
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83305035A
Other languages
English (en)
French (fr)
Other versions
EP0105603A3 (de
Inventor
Gerald Dr. Moss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Exxon Research and Engineering Co filed Critical Exxon Research and Engineering Co
Publication of EP0105603A2 publication Critical patent/EP0105603A2/de
Publication of EP0105603A3 publication Critical patent/EP0105603A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/006—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the sorption type system

Definitions

  • This invention relates the coupling of an adsorption heat pump with an absorption heat pump.
  • a process of operating an absorption heat pump coupled to an adsorption heat pump is one wherein heat of condensation is delivered from the condenser of the absorption heat pump alternately to the external load and to the adsorption heat pump for use in vaporising adsorbate to be adsorbed by adsorbent and wherein heat of adsorption and sensible heat are transferred from the adsorption heat pump to the generator of the absorption heat pump.
  • the absorption heat pump When the heat of condensation is delivered from its condenser to the load the absorption heat pump operates normally, that is to say absorbate is driven off from the generator by heat supplied indirectly from the adsorberj vaporised absorbate is condensed in the condenser, rejecting heat of condensation, condensed absorbate after being expanded is sent to the evaporator where it evaporates and from the evaporator vaporised absorbate is delivered to the absorber where the heat of absorption is rejected.
  • Weak working fluid solution is pumped from the absorber to the generator and strong working fluid solution is delivered from the generator to the absorber via an expansion valve.
  • the transferrence of heat in the process of the invention is usually by indirect heat exchange.
  • heat of condensation evolved in the condenser of the absorption heat pump may be transferred by way of a heat exchanger located within the condenser, conduits having valves and a pump to a heat exchanger, located in the evaporator/condenser of the adsorption heat pump.
  • heat is supplied to the adsorbent in the adsorber preferably by indirect heat exchange and heat may be transferred from the adsorber to the generator of the absorption heat pump through heat exchangers located within the adsorber and the generator inter connected by conduits, valves and pumps.
  • Heat may be supplied to the adsorber for desorbing the adsorbent by means of a resistive heater or by means of the circulation through a heat exchanger of heat transfer fluid heated by a boiler.
  • the preferred adsorbent/adsorbate system is Y- zeolite molecular sieve/water.
  • 4A- zeolite molecular sieve/water or 3A- zeolite molecular sieve/water can be used.
  • the working fluid used in the absorption heat pump is preferably a solution of ammonia (absorbate) in water (absorbent).
  • a suitable heat transfer fluid for use in the heat exchangers and in the connecting conduits is a low vapour pressure liquid, for example a silicon liquid, e.g Dow Syltherm 800.
  • Other suitable fluids are thermally stabilised aromatic hydrocarbons.
  • the absorption heat pump works in its normal manner and heat is delivered to the load both from the condenser and from the absorber. Relatively low temperature heat is accepted at the evaporator.
  • the desorbed adsorbate is condensed in the evaporator/ condenser of the adsorption heat pump and the heat of condensation is transferred by heat exchange to the generator of . the absorption heat pump.
  • the absorption heat pump still works in its normal manner as outlined immediately above, but sensible heat is transferred by heat exchange from the adsorber to the generator of the absorption heat pump.
  • the heat of condensation from the condenser of the absorption heat pump is transferred by heat exchange to the evaporator/condenser of the adsorption heat pump where condensed adsorbate is evaporated and is adsorbed by the adsorbent.
  • the heat of adsorption thus produced is transferred by heat exchange to the generator of the adsorption heat pump.
  • Apparatus for carrying out the process of the invention comprises an absorption heat pump coupled to an adsorption heat pump wherein there are means for transferring by heat exchange heat of condensation from the condenser of the absorption heat pump alternately to the external load and to the evaporator/condenser of the adsorption heat pump. There are also means for transferring heat of adsorption and sensible heat from the adsorption heat pump to the generator of the absorption heat pump.
  • the absorption heat pump is conventional and comprises a generator, an absorber, an evaporator and a condenser.
  • the evaporator is designed to house the absorbate solution and to receive heat from a low temperature source, e.g. ambient air, either directly or indirectly.
  • a low temperature source e.g. ambient air
  • an absorber in communication, e.g., by conduit, with the evaporator.
  • the transfer of heat generated in the absorber to the load is preferably by means of a heat exchanger.
  • a generator Connected to the absorber in the usual manner for an absorption system is a generator.
  • a generator Connected to the absorber in the usual manner for an absorption system is a generator.
  • Weak working fluid is conveyed from the absorber to the generator through the non-valved conduit by a solution pump, whilst strong working fluid from the generator is conveyed to the absorber through the conduit having the expansion valve.
  • the absorption system includes a condenser communicating e.g. by conduits with both the generator and the evaporator.
  • Absorbate vapour passes from the generator to the condenser where it condenses .
  • Condensed absorbate passes to the evaporator after passing through an expansion valve.
  • the adsorption heat pump can be a series of trays housing adsorbent below which is a condenser/evaporator.
  • adsorption heat pump is described in our U. K. Patent Application, GB.8222333.
  • adsorption heat pump adsorbate when desorbed from the adsorbent is allowed to condense in the condenser/ evaporator.
  • the condensed adsorbate is evaporated and this rises and is adsorbed by the adsorbent housed in the trays.
  • the heat of adsorption can be transferred elsewhere by means of a heat exchanger associated with the trays.
  • the means for transferring heat in the apparatus of the invention are preferably heat exchangers.
  • Preferably these heat exchangers are located inside each unit.
  • a heat exchanger is located within the condenser of the absorption heat pump rather than outside this condenser.
  • Conduits and where necessary, valves and pumps are used to interconnect the various heat exchangers.
  • header tank connected to the conduits interconnecting the heat exchangers.
  • This tank contains heat transfer fluid and this will enable any lost heat transfer fluid in the system to be replenished.
  • the absorption heat pump comprises a generator 1, connected by conduits 9 and 10 to an absorber 2.
  • Absorber 2 is connected by conduit 13 to an evaporator 3 which in turn is connected by conduit 14 to condenser 4.
  • a conduit 46 connects the condenser 4 with the generator 1.
  • a circulating pump 11 is provided in conduit 9 and there is an expansion valve 12 in conduit 10 and an expansion valve 15 in conduit 14.
  • the adsorption heat pump 16 comprises trays of Y-type zeolite molecular sieve in the upper part 19 which is the adsorber and in which heat exchangers 17 and 18 are located.
  • a heat exchanger 21 In the lower part 20 of the heat pump 16 which is the evaporator/condenser is located a heat exchanger 21.
  • This heat exchanger 21 is connected by conduit 22 and valve 24 to heat exchanger 8 and also connected to this heat exchanger 8 by conduit 25, valve 26 and circulation pump 27.
  • Conduits 22 and 25 are also connected respectively to conduits 28 and 29 which lead to the external load, conduit 29 being provided with a valve 30.
  • Heat exchanger 18 is connected to heat exchanger 5 .by means of conduits 31and 32, the former being provided with a valve 33 and a circulation pump 34. Conduit 32 is connected to conduit 25 by means of conduit 35 having valve 36.
  • header tank 37 housing heat transfer fluid which in this case is Dow Syltherm 800 and this tank 37 is connected by conduit 38 to conduit 22.
  • Heat is supplied to the adsorber 19 at about 300°C through the heat exchanger 17 through which Dow Syltherm 800 circulates, the heat being derived from a boiler.
  • the apparatus operates as follows :
  • the absorption heat pump will be working normally, i.e., low temperature heat at about -5°C will be accepted through heat exchanger 7 in the evaporator 3 and delivered at a temperature of about 50°C to the external-load through heat exchanger 6 located in the absorber 2.
  • Weak working fluid i.e., aqueous ammonia
  • aqueous ammonia will be pumped from absorber 2 by pump 11 through conduit 9 to the generator 1 whilst strong aqueous ammonia passes from the generator 1 through conduit 10 and expansion valve 12 to the absorber 2.
  • Ammonia vapour also passes through conduit 46 from the generator 1 to the condenser 4 where it condenses rejecting heat of condensation.
  • Liquid ammonia passing through conduit 14 expands- through expansion valve 15 and passes to the evaporator 3 where it evaporates. From the evaporator 3 vaporised ammonia passes to the absorber 2 through conduit 13 where it is absorbed in the aqueous ammonia solution, giving up heat of absorption to the heat exchanger 6.
  • External heat is also provided by the heat of condensation in the condenser 4 being transferred to heat exchanger 8 from which heat is abstracted for delivery to the external load through the flow of heat transfer fluid through conduits . 28 and 29, pump 27 and open valve 30.
  • the water vapour desorbed from the zeolite is condensed in the condenser/evaporator 20 and the heat of condensation is transferred from the heat exchanger 21 through flow of heat transfer fluid via conduits 25, 35 and 32, valve 36 being open, to the heat exchanger 5 in the generator and back to the condenser/evaporator 20 via conduit 31, circulation pump 34 and conduits 38 and 22.
  • valve 36 In the next stage at the conclusion of the desorption operation valve 36 is shut and valve 33 is opened. Valve 30 remains open and valves 24 and 26 remain closed.
  • Sensible heat from the adsorber 19 is now transferred to the generator 1. This is achieved by the circulation of the heat transfer fluid from heat exchanger 18 through conduit 31 via valve 33 by means of pump 34 to the heat exchanger 5 and back to the heat exchanger 18 via conduit 32. During this operation the absorption heat pump still operates as before.
  • valve 30 In the final stage when the temperature of the adsorber 19 has reached 150°C, valve 30 is closed and valves 24 and 26 are opened. Valve 36 remains closed and valve 33 remains open.
  • heat exchanger 21 located in the evaporator/condenser 20 causes water (adsorbate) to evaporate and this is adsorbed by the zeolite in the adsorber 19.
  • the heat of adsorption thus produced is transferred from heat exchanger 18 to heat exchanger 5 located in the generator 1 by means of the circulation of the heat transfer fluid through conduit 31, open valve 33, pump 34 and back via conduit 32.
  • the absorption heat pump works as before with the exception that the heat of condensation is transferred to the evaporator/condenser 20 rather than being supplied to the external load.
  • the three stages of the process of the invention can be repeated indefinitely and heat pumped from a temperature of about -5°C (received in the evaporator3) to a temperature of about 50°C (delivered from condenser 4 and absorber 2).
  • Automatic means e.g., temperature sensors and a microprocessor can be provided for opening and shutting the valves when required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
EP83305035A 1982-09-03 1983-08-31 Tandemwärmepumpe Withdrawn EP0105603A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08225142A GB2126706B (en) 1982-09-03 1982-09-03 Combined adsorption and absorption heat pump
GB8225142 1982-09-03

Publications (2)

Publication Number Publication Date
EP0105603A2 true EP0105603A2 (de) 1984-04-18
EP0105603A3 EP0105603A3 (de) 1985-08-07

Family

ID=10532673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83305035A Withdrawn EP0105603A3 (de) 1982-09-03 1983-08-31 Tandemwärmepumpe

Country Status (3)

Country Link
EP (1) EP0105603A3 (de)
GB (1) GB2126706B (de)
NO (1) NO833154L (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438427A1 (de) * 1994-10-27 1996-05-02 Zae Bayern Bay Zentrum Fuer An Mehrstufige Kältemaschine bzw. Wärmepumpe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5575835A (en) * 1995-08-11 1996-11-19 W. L. Gore & Associates, Inc. Apparatus for removing moisture from an environment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR747191A (fr) * 1931-12-08 1933-06-12 Siemens Ag Dispositif pour la transformation de chaleur
EP0026257A2 (de) * 1979-09-28 1981-04-08 Georg Dr. Prof. Alefeld Absorptions-Wärmepumpeanlage
EP0035871A1 (de) * 1980-03-07 1981-09-16 Thermal Energy Storage, Inc Geschlossenes System für Verdampfungswärmeübertragung
GB2076523A (en) * 1980-05-22 1981-12-02 Exxon Research Engineering Co Absorption heat pump
FR2495497A1 (fr) * 1980-12-05 1982-06-11 Exxon Research Engineering Co Procede combine d'absorption et d'adsorption et appareil pour sa mise en oeuvre
GB2114730A (en) * 1982-01-29 1983-08-24 Exxon Research Engineering Co Absorption heat pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR747191A (fr) * 1931-12-08 1933-06-12 Siemens Ag Dispositif pour la transformation de chaleur
EP0026257A2 (de) * 1979-09-28 1981-04-08 Georg Dr. Prof. Alefeld Absorptions-Wärmepumpeanlage
EP0035871A1 (de) * 1980-03-07 1981-09-16 Thermal Energy Storage, Inc Geschlossenes System für Verdampfungswärmeübertragung
GB2076523A (en) * 1980-05-22 1981-12-02 Exxon Research Engineering Co Absorption heat pump
FR2495497A1 (fr) * 1980-12-05 1982-06-11 Exxon Research Engineering Co Procede combine d'absorption et d'adsorption et appareil pour sa mise en oeuvre
GB2114730A (en) * 1982-01-29 1983-08-24 Exxon Research Engineering Co Absorption heat pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438427A1 (de) * 1994-10-27 1996-05-02 Zae Bayern Bay Zentrum Fuer An Mehrstufige Kältemaschine bzw. Wärmepumpe
DE4438427C2 (de) * 1994-10-27 1998-02-12 Zae Bayern Bayerisches Zentrum Fuer Angewandte Energieforschung Ev Mehrstufige Kältemaschine bzw. Wärmepumpe

Also Published As

Publication number Publication date
EP0105603A3 (de) 1985-08-07
NO833154L (no) 1984-03-05
GB2126706B (en) 1986-02-05
GB2126706A (en) 1984-03-28

Similar Documents

Publication Publication Date Title
AU618509B2 (en) Absorption refrigeration method and apparatus
US5038574A (en) Combined mechanical refrigeration and absorption refrigeration method and apparatus
US5816070A (en) Enhanced lithium bromide absorption cycle water vapor recompression absorber
EP0061888B1 (de) Abgestufte Adsorptions/Resorptions-Wärmepumpe
US4594856A (en) Method and device for pumping heat
US4441332A (en) Absorption refrigeration and heat pump system
JPH07508926A (ja) 水蒸留装置
JPS59208368A (ja) ヒ−トポンプ
AU7982991A (en) Branched gax absorption vapor compressor
US4448030A (en) Combined staged air conditioner and heat store
US5016444A (en) One-and-a-half effect absorption cycle
EP0105603A2 (de) Tandemwärmepumpe
GB2138121A (en) Sorption heat pumps
KR19990078168A (ko) 응축물 용액 결합에 의한 흡수 냉각 시스템
JP3217706B2 (ja) 水溶液の自己蒸発圧縮式濃縮方法及びその装置
CN111252834A (zh) 一种基于制冷剂循环的低能耗废水蒸发分离方法
GB2114730A (en) Absorption heat pump
US2073651A (en) Convertible heating and cooling system
US5911746A (en) Gax absorption cycle with secondary refrigerant
GB2157415A (en) Coupled heat pumps
GB2130713A (en) Staged heat pumps
JPH058351U (ja) 温水焚吸収冷温水機
JPS58156168A (ja) 吸着剤利用の冷却装置
JPH04369359A (ja) 吸収式ヒートポンプ装置
JPS62276378A (ja) 抽気装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19860109

17Q First examination report despatched

Effective date: 19860530

D17Q First examination report despatched (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870702

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MOSS, GERALD, DR.