WO1997034961B1 - DROP-IN SUBSTITUTES FOR 1,1,1,2-TETRAFLUOROETHANE (R-134a) REFRIGERANT - Google Patents
DROP-IN SUBSTITUTES FOR 1,1,1,2-TETRAFLUOROETHANE (R-134a) REFRIGERANTInfo
- Publication number
- WO1997034961B1 WO1997034961B1 PCT/US1997/004592 US9704592W WO9734961B1 WO 1997034961 B1 WO1997034961 B1 WO 1997034961B1 US 9704592 W US9704592 W US 9704592W WO 9734961 B1 WO9734961 B1 WO 9734961B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight percent
- mixture
- present
- refrigerant
- tetrafluoroethane
- 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.)
- Ceased
Links
Abstract
A group of refrigerant fluids that may be combined in novel ways to produce several excellent 'drop-in' substitutes for R-134a refrigerant. Performance is increased by constructing a zeotropic mixture of refrigrants, such that a single boiling point (of R-134a) is replaced by a 'temperature glide' between the mixture's 'bubble point' and 'dew point'. The temperature glide causes the phase change area in the condenser to be larger than with a single component refrigerant such as R-134a, thereby increasing heat rejection of the condenser, which lowers head pressures, and increases capacities and efficiencies compared to R-134a. Components are also selected to attempt to reduce the overall critical temperature of the mixture of refrigerants, also increasing performance and lowering head pressures under hot conditions with undersized condensers. Finally, a small amount of a mineral oil miscibility improver may be added, not to return mineral oil from the evaporator as in R-12 systems, but to keep waxes, tars, and other contaminates in the system that may have arisen from the manufacturing process (such as wax coatings on the motor windings in a hermetic compressor, or 'tar' from valve packing) soluble.
Claims
35
AMENDED CLAIMS
[received by the International Bureau on 30 September 1997 (30 09 97), original claims 10-12 amended, remaining claims unchanged (2 pages)]
6 The mixture of refrigerants of claim 1 in which heptafluoropropane is present in about 45 weight percent, 1 ,1- difluoroethane is present in about 15 weight percent, and pentafiuoroethane is present in about 40 weight percent
7 The mixture of refrigerants of claim 1 in which heptafluoropropane is present in about 45 weight percent, 1 ,1- difluoroethane is present in about 20 weight percent, and pentafiuoroethane is present in about 35 weight percent
8 A mixture of refrigerants that is a drop-in substitute for 1 ,1 ,1 ,2-tetrafluoroethane refrigerant in 1 ,1 , 1 ,2-tetrafluoroethane refrigeration systems, comprising about 75 weight percent heptafluoropropane, and about 25 weight percent pentafiuoroethane, with the weight percentages of said components being weight percentages of the overall mixture
9 A mixture of refrigerants that is a drop-in substitute for
1 ,1 ,1 ,2-tetrafluoroethane refrigerant in 1 ,1 ,1 ,2-tetrafluoroethane refrigeration systems, comprising about 1 weight percent isobutane, about 75 weight percent heptafluoropropane, and about 24 weight percent pentafiuoroethane, with the weight percentages of said components being weight percentages of the overall mixture
10 A mixture of refrigerants that is a drop-in substitute for 1 ,1 ,1 ,2-tetrafluoroethane refrigerant in 1 ,1 ,1 ,2-tetrafluoroethane refrigeration systems, comprising about 1 weight percent isobutane, about 22 - 57 weight percent heptafluoropropane, about 22 - 32 weight percent
pentafiuoroethane, and about 10 weight percent 1 ,1 ,1 ,2-tetrafluoroethane, with the weight percentages of said components being weight percentages of the overall mixture
11 The mixture of refrigerants of claim 10 in which isobutane is present in about 1 weight percent, heptafluoropropane is present in about 67 weight percent, pentafiuoroethane is present in about 22 weight percent, and 1 ,1 ,1 ,2-tetrafluoroethane is present in about 10 weight percent, with the weight percentages of said components being weight percentages of the overall mixture
12 The mixture of refrigerants of claim 10 in which isobutane is present in about 1 weight percent, heptafluoropropane is present in about 57 weight percent, pentafiuoroethane is present in about 32 weight percent, and 1 ,1 ,1 ,2-tetrafluoroethane is present in about 10 weight percent, with the weight percentages of said components being weight percentages of the overall mixture
13 A mixture of refrigerants that is a drop-in substitute for 1 ,1 ,1 ,2-tetrafluoroethane refrigerant in 1 ,1 ,1 ,2-tetrafluoroethane refrigeration systems, comprising about 48 - 58 weight percent 1 ,1 ,1 ,2,2- pentafluoropropane, about 41 - 51 weight percent pentafiuoroethane, and about 1 weight percent propane, with the weight percentages of said components being weight percentages of the overall mixture
14 The mixture of refrigerants of claim 13 in which 1 ,1 ,1 ,2,2- pentafluoropropane is present in about 58 weight percent, pentafiuoroethane is present in about 41 weight percent, and propane is
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU25862/97A AU2586297A (en) | 1996-03-22 | 1997-03-21 | Drop-in substitutes for 1,1,1,2-tetrafluoroethane (r-134a) refrigerant |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1394696P | 1996-03-22 | 1996-03-22 | |
| US60/013,946 | 1996-03-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997034961A1 WO1997034961A1 (en) | 1997-09-25 |
| WO1997034961B1 true WO1997034961B1 (en) | 1997-11-20 |
Family
ID=21762652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1997/004592 Ceased WO1997034961A1 (en) | 1996-03-22 | 1997-03-21 | DROP-IN SUBSTITUTES FOR 1,1,1,2-TETRAFLUOROETHANE (R-134a) REFRIGERANT |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5954995A (en) |
| AU (1) | AU2586297A (en) |
| WO (1) | WO1997034961A1 (en) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU6181098A (en) * | 1997-02-24 | 1998-09-09 | Allied-Signal Inc. | Azeotrope-like compositions of pentafluoropropane and tetrafluoroethane |
| IT1293326B1 (en) * | 1997-07-11 | 1999-02-16 | Ausimont Spa | REFRIGERANT COMPOSITIONS |
| DE998539T1 (en) | 1997-07-15 | 2000-11-09 | Rhodia Ltd., Watford | COOLANT COMPOSITION |
| US6076372A (en) * | 1998-12-30 | 2000-06-20 | Praxair Technology, Inc. | Variable load refrigeration system particularly for cryogenic temperatures |
| US7258813B2 (en) * | 1999-07-12 | 2007-08-21 | E.I. Du Pont De Nemours And Company | Refrigerant composition |
| GB2356867A (en) * | 1999-12-03 | 2001-06-06 | Rhodia Ltd | Refrigeration Compositions |
| FR2813610B1 (en) * | 2000-09-04 | 2002-10-18 | Atofina | COMPOSITION FOR USE AS A REFRIGERATION FLUID |
| US6516837B2 (en) | 2000-09-27 | 2003-02-11 | Honeywell International Inc. | Method of introducing refrigerants into refrigeration systems |
| EP1432476A1 (en) * | 2001-09-21 | 2004-06-30 | Honeywell International Inc. | Cross reference to related applications |
| GB0206413D0 (en) * | 2002-03-19 | 2002-05-01 | Refrigerant Products Ltd | Refrigerant for centrifugal compressors |
| US6863840B2 (en) * | 2002-06-27 | 2005-03-08 | George H. Goble | Nonflammable, nonozone depleting, refrigerant mixtures suitable for use in mineral oil |
| AU2003273365A1 (en) * | 2002-10-01 | 2004-04-23 | James B. Tieken | Refrigerant blend |
| GB0223724D0 (en) | 2002-10-11 | 2002-11-20 | Rhodia Organique Fine Ltd | Refrigerant compositions |
| ATE532841T1 (en) * | 2002-11-29 | 2011-11-15 | Du Pont | RADIATOR REFRIGERANT |
| US7560045B2 (en) * | 2003-10-21 | 2009-07-14 | Dow Global Technologies, Inc. | Refrigerant composition |
| KR20060094081A (en) * | 2003-10-21 | 2006-08-28 | 유니온 카바이드 케미칼즈 앤드 플라스틱스 테크날러지 코포레이션 | Refrigerant composition |
| CN1328350C (en) * | 2004-04-05 | 2007-07-25 | 天津大学 | Middle and high temperature heat pump mixed working medium containing HFC245fa |
| PT1994114E (en) | 2006-03-03 | 2014-12-11 | Rpl Holdings Ltd | Refrigerant composition |
| JP5139665B2 (en) * | 2006-11-02 | 2013-02-06 | 出光興産株式会社 | Lubricating oil composition for refrigerator |
| ES2333193B1 (en) * | 2008-04-03 | 2010-12-10 | Advanced Ideas, S.L. | USEFUL COMPOSITION AS A REFRIGERANT FLUID AND ITS USE IN A HEAT TRANSFER SYSTEM. |
| EP2271724B1 (en) * | 2008-05-07 | 2013-04-24 | E. I. Du Pont de Nemours and Company | Compositions comprising 2,3,3,3- tetrafluoropropene |
| GB0922288D0 (en) * | 2009-12-21 | 2010-02-03 | Rpl Holdings Ltd | Non ozone depleting and low global warming potential refrigerants for refrigeration |
| US9599380B2 (en) * | 2012-01-24 | 2017-03-21 | Mitsubishi Electric Corporation | Refrigerant charging method for air-conditioning apparatus and air-conditioning apparatus |
| US8652348B1 (en) * | 2012-12-18 | 2014-02-18 | Ahmad M. Shihab | Drop in refrigerant blend for mineral oil based systems |
| US8999191B2 (en) | 2013-03-15 | 2015-04-07 | National Refrigerants, Inc. | R22 replacement refrigerant |
| US10330364B2 (en) * | 2014-06-26 | 2019-06-25 | Hudson Technologies, Inc. | System and method for retrofitting a refrigeration system from HCFC to HFC refrigerant |
| GB201505230D0 (en) | 2015-03-27 | 2015-05-13 | Rpl Holdings Ltd | Non ozone depleting and low global warming refrigerant blends |
| US20190122479A1 (en) * | 2017-10-23 | 2019-04-25 | Nidec Motor Corporation | Drive system for vending machine |
| PT3704203T (en) | 2017-11-27 | 2023-07-05 | Rpl Holdings Ltd | Low gwp refrigerant blends |
| CN110832051B (en) * | 2018-06-13 | 2020-12-18 | 日立江森自控空调有限公司 | Refrigerant composition and refrigeration cycle apparatus using the same |
| US11827834B2 (en) | 2020-10-22 | 2023-11-28 | Rpl Holdings Limited | Thermal pump refrigerants |
| CN119931604A (en) * | 2025-04-07 | 2025-05-06 | 浙江巨化装备工程集团有限公司 | Immersion cooling liquid and its application and thermal management device |
| CN119931603A (en) * | 2025-04-07 | 2025-05-06 | 浙江巨化装备工程集团有限公司 | A direct contact immersion cooling liquid and its application and thermal management device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2847797B2 (en) * | 1989-09-06 | 1999-01-20 | ダイキン工業株式会社 | Working fluid |
| JP2792191B2 (en) * | 1990-04-04 | 1998-08-27 | ダイキン工業株式会社 | Coolant |
| KR100190185B1 (en) * | 1991-03-18 | 1999-06-01 | 크리스 로저 에이치 | Non-azeotropic refrigerant compositions comprising difluoromethane; 1,1 1-trifluoroethane; or propane |
| EP0557533A1 (en) * | 1991-09-12 | 1993-09-01 | Daikin Industries, Ltd. | Blowing agent composition |
| FR2681852B1 (en) * | 1991-09-27 | 1993-12-17 | Kodak Pathe | PROCESS FOR THE CONTINUOUS PREPARATION OF VANADIUM PENTOXIDE GELS AND APPARATUS FOR IMPLEMENTING THE PROCESS. |
| ATE199565T1 (en) * | 1991-12-03 | 2001-03-15 | Us Environment | REFRIGERANT COMPOSITION AND METHOD FOR USE THEREOF |
| AU4649593A (en) * | 1992-06-25 | 1994-01-24 | Great Lakes Chemical Corporation | Refrigerant blends containing 1,1,1,2,3,3,3-heptafluoropropane |
| AU686129B2 (en) * | 1993-01-20 | 1998-02-05 | Imperial Chemical Industries Plc | Refrigerant compositions |
-
1997
- 1997-03-20 US US08/820,843 patent/US5954995A/en not_active Expired - Lifetime
- 1997-03-21 WO PCT/US1997/004592 patent/WO1997034961A1/en not_active Ceased
- 1997-03-21 AU AU25862/97A patent/AU2586297A/en not_active Abandoned
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