US3721109A - High pressure multiple pump for absorption refrigeration machine - Google Patents
High pressure multiple pump for absorption refrigeration machine Download PDFInfo
- Publication number
- US3721109A US3721109A US00149552A US3721109DA US3721109A US 3721109 A US3721109 A US 3721109A US 00149552 A US00149552 A US 00149552A US 3721109D A US3721109D A US 3721109DA US 3721109 A US3721109 A US 3721109A
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- US
- United States
- Prior art keywords
- pump
- impeller
- conduit
- solution
- refrigerant
- 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.)
- Expired - Lifetime
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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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/025—Liquid transfer means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Definitions
- ABSTRACT g i A pump for circulating a plurality of fluids in an ab- 58] Fieid 487 sorption refrigeration machine, the pump having a i plurality of fluid impellers, at least two of which are arranged in series.
- the present invention provides a pump for an absorption refrigeration system, the system including an absorption refrigeration machine having a generator, a condenser, an evaporator, an absorber, a refrigerant and a solution capable of absorbing the refrigerant.
- a multiple pump is provided for circulating refrigerant and absorbent solution as required for the operation of the machine.
- the pump has a plurality of impellers wherein separate impellers may circulate different fluids between diverse portions of the machine. At least two of the impellers are serially arranged and adapted to transfer absorbent solution between the absorber and the generator.
- FIG. 1 is adiagrammatic sectional view of an absorption refrigeration system including the fluid circulating system
- FIG. 2 is a front elevation view in vertical cross-section ofthe pump used in the present system.
- the absorption system shown is of the type having a single shell 10, a partition 11 separating a first generator stage from a second generator stage 12 and a condenser 14. Partition l6 further separates the second stage generator and condenser section from a low pressure chamber containing an evaporator 18 and an absorber 20. It should be understood that other arrangements might be used; for instance, the first stage generator 13 might be contained in a single shell with the remaining components in a second shell. Alternatively the generators of 13 and 12 and the condenser 14 might be in one shell and the absorber 20 and evaporator 18 might be in a second shell with conduits therebetween for conducting fluids.
- the absorber 20 has a coil 22 supplied with cooling fluid from a source 24 to remove the heat from the absorber.
- the cooling fluid is conducted by conduit 26 to a cooling coil 28 in the condenser 14 and the cooling fluid leaves the machine through a conduit 30.
- the cooling coil 28 in the condenser 14 removes the heat from and condenses the refrigerant vapor in the condenser.
- the first stage or high pressure generator 13 has a heating coil 31 supplied with heating fluid from a source 33.
- the heating fluid is discharged from the coil through conduit 35.
- the coil 31 beats the absorbent solution in the generator 13 causing it to boil whereby refrigerant vapor is released therefrom.
- the refrigerant vapor passes through conduit 32 and through the coil 34 of the second stage or low pressure generator 12.
- the refrigerant vapor condenses and releases heat tofurther concentrate intermediate strength solution present in the second stage generator 12.
- the refrigerant then passes to the condenser 14 via conduit 36, flow of refrigerant being controlled by restrictor 38.
- the condensed refrigerant in the condenser flows through an opening 40 into the evaporator 18.
- the absorbent solution in the absorber 20 reduces the pressure in the absorber 20 and in the evaporator 18 by the absorption of refrigerant vapor, thus causing the refrigerant in evaporator 18 to boil. A low temperature is thus maintained in the evaporator 18.
- Evaporator 18 has a coil 42. Fluid from a refrigerating load such as an air conditioning system enters coil 42 through conduit 44. This fluid is reduced in temperature in the coil 42 and returns to the refrigerating load through conduit 46. r
- the liquid refrigerant in the evaporator 18 collects in a pan 50, and flows from the pan via conduit 52 to a pump indicated generally at 60, and specifically to an impeller portion 62 of the pump 60.
- Pump 60 may be driven by any suitable motor means 130.
- the liquid refrigerant is discharged by pump 60 through conduit 54 from which it flows through nozzles 56 into an evaporator 18.
- Dilute solution flows from the absorber 20 through conduit 58 to pump 60, and specifically to impeller portion 64.
- the solution is discharged from impeller portion 64 through conduit 66 and to a second impeller portion 68. It can be seen, therefore, that impeller sections 64 and 68 are thereby arranged in series.
- the dilute solution is discharged from pump 60 through conduit 70 which conducts the fluid to heat exchanger 71 from which it flows through conduit 72 to heat exchanger 73 and from there through conduit 74 to the high pressure generator 13.
- the dilute solution is partially concentrated in generator 13 by the boiling off of refrigerant as herein before described in detail.
- the intermediate strength solution is withdrawn from generator 13 via conduit 76 and passes through heat exchanger 73 from which it is conducted through conduit 78 to the second stage generator 12.
- the intermediate solution is further concentrated in generator 12 and is withdrawn therefrom via conduit 80 and passes through heat exchanger 71, conduit 82, and into conduit 84.
- Dilute solution from the absorber 20 passes into conduit 84 wherein it is mixed with the concentrated solution passing from conduit 82 and the resulting mixture enters pump 60 and specifically impeller portion 65, exiting from pump 60 via conduit 86. From conduit 86 the intermediate strength solution is sprayed from nozzles 90 over the tube bundle in absorber 20.
- Pump 60 has a pump body 91 and end walls 92 and 93. Attached to end plate 92 is a bearing housing 94, and at the opposite end of pump 60, bearing housing 95 is mounted to transverse portion 96 of pump body 91. Bearing 97 is carried by bearing housing 94 and bearing 98 is carried by bearing housing 95. Shaft 99 is rotatably mounted in bearings 97 and 98.
- a refrigerant impeller 62 is mounted on shaft 99 to rotate therewith.
- Pump 60 has an inlet passage 100 in fluid communication with conduit 52 and impeller 62.
- a discharge passageway 101 is in fluid communication with impeller 62 and conduit 54.
- a labyrinth seal 102 provides the seal between the discharge passage 101 and the inlet passage 100, thus creating the differential pressure for flow through passage 103 to chamber 105 and bearing 98 and through passage 104 back to the suction side of impeller 62.
- Chamber 105 also provides cooling for seal 106.
- conduit 107 Threaded into discharge chamber 101 is conduit 107 shown terminating in valve 108.
- Valve 108 may be used to open discharge passageway 101 to the air during servicing of pump 60 if desired. However, it is preferred to extend conduit 107 around to the pump motor 130 in order to provide refrigerant to the motor for cooling.
- An absorption solution impeller 65 is mounted on shaft 99 to rotate therewith, on the end of pump 60 op posite impeller 62.
- Pump 60 has an inlet passage 108 in fluid communication with conduit 84 and impeller 65.
- a discharge passageway 109 is in fluid communication with impeller 65, conduit 86, and conduit 110 which terminates in valve 112.
- Valve 112 is normally closed but may be opened to admit air to pump 60 during servicing.
- Pump 60 has an inlet portion 114 in fluid communication with conduit 58 and impeller 64.
- a discharge passageway 16 is in fluid communication with impeller 64 and conduit 66.
- Conduit 118 is in fluid communication with narrower upper portion of discharge passageway 116, and said conduit is shown terminating in valve 119, which is normally closed and may be opened during servicing and the like as hereinbefore described in connection with similar vent valves.
- Conduit 66 communicates with discharge passageway 11 6 and with inlet portion 1 20,which inlet portion is also in fluid communication with impeller 68.
- impeller 64 is introduced to the suction side of impeller 68, thereby arranging these impellers in series.
- impeller 68 is also in fluid communication with discharge passageway 122 which in turn is in fluid communication with conduit 70.
- the dilute solution from absorber 20 is conveyed to the high pressure generator 13 via impellers 64 and 68 of pump 60, whereby the discharge pressure from impeller 68 is greater than the discharge pressure from impeller 64, thereby enabling pump 60 to satisfy the pressure requirements of a high pressure generator as may be found in a two-stage absorption machine.
- the size of the impellers 64 and 68 remains compatable with impellers 62 and 65 so that the entire pump assembly can be driven by a single motor.
- Conduit 115 is in fluid communication with the narrower upper portion of discharge passageway 122, and terminates in valve 117 which functions in the same manner as the other vent valves such as valves 1 12 and 119 previously described.
- An electric motor 130 may be mounted at end of shaft 99 which protrudes beyond the pump housing. It is desired to route lubricant from the motor lubrication system through chamber to bearing 97 for lubrication thereof. Seal 127 is provided between bearing 97 and inlet portion 108.
- An absorption refrigeration system comprising a first stage high pressure generator, a second stage low pressure generator, an absorber, an evaporator, a condenser, an absorbent solution, a refrigerant, and pump means for moving said absorbent solution and said refrigerant within said system;
- said pump means including a shaft having a motor drivingly connected thereto, a first impeller mountedat one end of said shaft to receive refrigerant from a first portion of said evaporator and transfer said refrigerant to a second portion of said evaporator; a second impeller mounted on said shaft at the end opposite said first impeller to receive absorbent solution from a first portion of said absorber and transfer said solution to a second portion of said absorber; a third impeller mounted on a central portion of said shaft to receive absorbent solution from said absorber and transfer said solution to a fourth impeller, said fourth impeller mounted on a central portion of said shaft to receive said solution form said third impeller and transfer said solution to said first stage high pressure generator, all of said
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
Description
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14955271A | 1971-06-03 | 1971-06-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3721109A true US3721109A (en) | 1973-03-20 |
Family
ID=22530806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00149552A Expired - Lifetime US3721109A (en) | 1971-06-03 | 1971-06-03 | High pressure multiple pump for absorption refrigeration machine |
Country Status (1)
Country | Link |
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US (1) | US3721109A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3964273A (en) * | 1975-02-13 | 1976-06-22 | Arkla Industries, Inc. | Compact absorption refrigeration apparatus |
US4085595A (en) * | 1975-12-29 | 1978-04-25 | Ebara Manufacturing Co., Ltd. | Double effect absorption refrigerating system |
US4183228A (en) * | 1977-03-22 | 1980-01-15 | Naoyuki Inoue | Double effect absorption refrigerating system comprising |
US4472947A (en) * | 1981-11-04 | 1984-09-25 | Ebara Corporation | Absorption refrigerating system |
US4742687A (en) * | 1984-11-13 | 1988-05-10 | Columbia Gas System Service Corporation | Dual cooling/heating process and composition |
US4776176A (en) * | 1986-10-20 | 1988-10-11 | Peter Vinz | Liquid exchange systems |
US5253523A (en) * | 1992-05-05 | 1993-10-19 | Bernardin Billy J | Absorption type chiller |
US20060053829A1 (en) * | 2002-09-27 | 2006-03-16 | Ebara Corporation | Absorption refrigerator |
US20100163215A1 (en) * | 2008-12-30 | 2010-07-01 | Caterpillar Inc. | Dual volute electric pump, cooling system and pump assembly method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3188968A (en) * | 1963-02-12 | 1965-06-15 | Kenton D Mcmahan | Centrifugal pumps |
US3296823A (en) * | 1965-06-16 | 1967-01-10 | Trane Co | Absorption refrigerating system having pump means circulating absorbent and refrigerant |
US3495420A (en) * | 1968-12-20 | 1970-02-17 | Trane Co | Two stage generator absorption unit with condensate heat exchanger |
-
1971
- 1971-06-03 US US00149552A patent/US3721109A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3188968A (en) * | 1963-02-12 | 1965-06-15 | Kenton D Mcmahan | Centrifugal pumps |
US3296823A (en) * | 1965-06-16 | 1967-01-10 | Trane Co | Absorption refrigerating system having pump means circulating absorbent and refrigerant |
US3495420A (en) * | 1968-12-20 | 1970-02-17 | Trane Co | Two stage generator absorption unit with condensate heat exchanger |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3964273A (en) * | 1975-02-13 | 1976-06-22 | Arkla Industries, Inc. | Compact absorption refrigeration apparatus |
US4085595A (en) * | 1975-12-29 | 1978-04-25 | Ebara Manufacturing Co., Ltd. | Double effect absorption refrigerating system |
US4183228A (en) * | 1977-03-22 | 1980-01-15 | Naoyuki Inoue | Double effect absorption refrigerating system comprising |
US4472947A (en) * | 1981-11-04 | 1984-09-25 | Ebara Corporation | Absorption refrigerating system |
US4742687A (en) * | 1984-11-13 | 1988-05-10 | Columbia Gas System Service Corporation | Dual cooling/heating process and composition |
US4776176A (en) * | 1986-10-20 | 1988-10-11 | Peter Vinz | Liquid exchange systems |
US5253523A (en) * | 1992-05-05 | 1993-10-19 | Bernardin Billy J | Absorption type chiller |
US20060053829A1 (en) * | 2002-09-27 | 2006-03-16 | Ebara Corporation | Absorption refrigerator |
US7225634B2 (en) * | 2002-09-27 | 2007-06-05 | Ebara Corporation | Absorption refrigerating machine |
US20100163215A1 (en) * | 2008-12-30 | 2010-07-01 | Caterpillar Inc. | Dual volute electric pump, cooling system and pump assembly method |
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Owner name: BANKERS TRUST COMPANY, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:TRANE AIR CONDITIONING COMPANY, A DE CORP.;REEL/FRAME:004905/0213 Effective date: 19880624 Owner name: BANKERS TRUST COMPANY, 4 ALBANY STREET, 9TH FLOOR, Free format text: SECURITY INTEREST;ASSIGNOR:TRANE AIR CONDITIONING COMPANY, A DE CORP.;REEL/FRAME:004905/0213 Effective date: 19880624 Owner name: BANKERS TRUST COMPANY Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN STANDARD INC., A DE. CORP.,;REEL/FRAME:004905/0035 Effective date: 19880624 |
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Owner name: AMERICAN STANDARD, INC., NEW JERSEY Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK);REEL/FRAME:008869/0001 Effective date: 19970801 |