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WO1993016143A1 - Compositions refrigerantes de monochlorodifluoromethane, de pentafluoroethane et de 1,1,1,2-tetrafluoroethane - Google Patents

Compositions refrigerantes de monochlorodifluoromethane, de pentafluoroethane et de 1,1,1,2-tetrafluoroethane Download PDF

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Publication number
WO1993016143A1
WO1993016143A1 PCT/US1993/001125 US9301125W WO9316143A1 WO 1993016143 A1 WO1993016143 A1 WO 1993016143A1 US 9301125 W US9301125 W US 9301125W WO 9316143 A1 WO9316143 A1 WO 9316143A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigeration
composition
refrigerant
weight percent
compositions
Prior art date
Application number
PCT/US1993/001125
Other languages
English (en)
Inventor
Ian Robert Shankland
Rajiv Ratna Singh
Hugh Michael Hughes
Kenneth Harris
Original Assignee
Allied-Signal Inc.
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 Allied-Signal Inc. filed Critical Allied-Signal Inc.
Publication of WO1993016143A1 publication Critical patent/WO1993016143A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
    • C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
    • C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
    • C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/10—Components
    • C09K2205/12—Hydrocarbons
    • C09K2205/122—Halogenated hydrocarbons

Definitions

  • Fluorocarbon based fluids have found widespread use in industry for refrigeration, air conditioning and heat pump applications.
  • Vapor compression cycles are one common form of refrigeration. In its simplest form, the vapor
  • compression cycle involves changing the refrigerant from the liquid to the vapor phase through heat
  • While the primary purpose of refrigeration is to remove energy at low temperature, the primary purpose of a heat pump is to add energy at higher temperature.
  • Heat pumps are considered reverse cycle systems because for heating, the operation of the condenser is interchanged with that of the refrigeration evaporator.
  • fluorocarbon based fluids which offer alternatives for refrigeration and heat pump applications.
  • fluorocarbon based mixtures which are considered to be environmentally acceptable substitutes for the presently used chlorofluorocarbons.
  • the latter such as R-502 (an azeotropic blend of 48.8 weight percent monochlorodifluoromethane and 51.2 weight percent monochloropentafluoroethane) are suspected of causing environmental problems in
  • the substitute materials must also possess those properties unique to the chlorofluorocarbons including similar refrigeration characteristics, chemical
  • thermodynamic performance or energy efficiency may have secondary environmental impacts through increased fossil fuel usage arising from an increased demand for electrical energy .
  • refrigerant fluids are defined clearly. If the small pressure drops in the refrigerant lines are ignored, the condensation or evaporation occurs at a single temperature corresponding to the condenser or
  • Monochlorodifluoromethane (HCFC-22) is more environmentally acceptable than some of the presently used chlorofluorocarbons and has been used as a refrigerant commercially but is known in the art to have too high a discharge temperature for direct use in simple machines.
  • Pentafluoroethane (HFC-125) is considered to be environmentally acceptable but is regarded as having too low a critical point.
  • 1,1,1,2-Tetrafluoroethane (HFC-134a) is considered to be environmentally acceptable but has too high a boiling point to directly replace R-502. DESCRIPTION OF THE INVENTION
  • novel non-azeotropic compositions comprising from about 1 to about 90 weight percent monochlorodifluoromethane (HCFC-22), from about 1 to about 90 weight percent pentafluoroethane (HFC-125) and from about 1 to about 50 weight percent 1,1,1,2-tetrafluoroethane (HFC-134a).
  • these compositions comprise from about 10 to about 80 weight percent HCFC-22, from about 10 to about 80 weight percent HFC-125 and from about 2 to about 4 weight percent HFC-134a.
  • These compositions are non-azeotropic.
  • HCFC-22, HFC-125 and HFC-134a components of the novel compositions of the invention are known materials. Preferably they should be used in
  • Additional components may be added to the mixture to tailor the properties of the mixture according to the need.
  • propane has been added to refrigerant compositions to aid oil
  • novel compositions of the invention satisfy the above-identified objectives for being a replacement for R-502. Calculation of the thermodynamic properties of these compositions show that the refrigeration performance is substantially the same as that of R-502. These compositions exhibit a vapor pressure substantially the same as R-502 and retain this
  • compositions of the invention may be used in a method for producing refrigeration which involves condensing a refrigerant comprising the compositions and thereafter evaporating the refrigerant in the vicinity of the body to be cooled.
  • compositions of the invention may be used in a method for producing heating which involves condensing a refrigerant comprising the compositions in the vicinity of the body to be heated and thereafter evaporating the refrigerant.
  • Example 1 shows that a preferred composition within the scope of the invention has a refrigeration performance substantially the same as R-502, yet is nonflammable even after substantial vapor leakage.
  • Example 1 shows that a preferred composition within the scope of the invention has a refrigeration performance substantially the same as R-502, yet is nonflammable even after substantial vapor leakage.
  • COP coefficient of performance
  • refrigerant represents the volumetric efficiency of the refrigerant. To a compressor engineer this value expresses the capability of a compressor to pump quantities of heat for a given volumetric flow rate of refrigerant. In other words, given a specific
  • a refrigerant with a higher capacity will deliver more cooling or heating power.
  • a similar calculation can also be performed for non-azeotropic refrigerant blends.
  • the vapor pressure of the blend is 87 psia at 32°F which is within 5 percent of the vapor pressure of R-502. After 50 percent of the blend is lost by evaporation, the vapor pressure of the claimed blend becomes 84 psia, remaining within 2 percent of the vapor pressure of R-502. The efficiency or the COP remains same as that of R-502 and the refrigeration capacity decreases only marginally to 97 percent of the original capacity.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

Des compositions comprenant entre 1 et 90 % en poids environ de monochlorodifluorométhane, entre 1 et 90 % en poids environ de pentafluoroéthane et entre 1 et 50 % en poids environ de 1,1,1,2-tétrafluoroéthane constituent des réfrigérants efficaces dans le rechauffement et le refroidissement.
PCT/US1993/001125 1992-02-12 1993-02-09 Compositions refrigerantes de monochlorodifluoromethane, de pentafluoroethane et de 1,1,1,2-tetrafluoroethane WO1993016143A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83441992A 1992-02-12 1992-02-12
US834,419 1992-02-12

Publications (1)

Publication Number Publication Date
WO1993016143A1 true WO1993016143A1 (fr) 1993-08-19

Family

ID=25266895

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/001125 WO1993016143A1 (fr) 1992-02-12 1993-02-09 Compositions refrigerantes de monochlorodifluoromethane, de pentafluoroethane et de 1,1,1,2-tetrafluoroethane

Country Status (2)

Country Link
AU (1) AU3615193A (fr)
WO (1) WO1993016143A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015637A1 (fr) * 1995-10-20 1997-05-01 Tsinghua University Refrigerant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4943388A (en) * 1989-06-28 1990-07-24 Allied-Signal Inc. Azeotrope-like compositions of pentafluoroethane; 1,1,1-trifluoroethane; and chlorodifluoromethane
EP0381389A1 (fr) * 1989-01-28 1990-08-08 Chujun Gu Fluide fonctionnel pour un appareil thermodynamique
EP0430131A1 (fr) * 1989-11-29 1991-06-05 Matsushita Electric Industrial Co., Ltd. Fluide de travail
WO1992001762A1 (fr) * 1990-07-26 1992-02-06 E.I. Du Pont De Nemours And Company Melanges quasi-azeotropes destines a etre utilises en tant que refrigerants
EP0419042B1 (fr) * 1989-09-12 1994-10-19 Star Refrigeration Ltd. Réfrigérant à trois composants

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381389A1 (fr) * 1989-01-28 1990-08-08 Chujun Gu Fluide fonctionnel pour un appareil thermodynamique
US4943388A (en) * 1989-06-28 1990-07-24 Allied-Signal Inc. Azeotrope-like compositions of pentafluoroethane; 1,1,1-trifluoroethane; and chlorodifluoromethane
EP0419042B1 (fr) * 1989-09-12 1994-10-19 Star Refrigeration Ltd. Réfrigérant à trois composants
EP0430131A1 (fr) * 1989-11-29 1991-06-05 Matsushita Electric Industrial Co., Ltd. Fluide de travail
WO1992001762A1 (fr) * 1990-07-26 1992-02-06 E.I. Du Pont De Nemours And Company Melanges quasi-azeotropes destines a etre utilises en tant que refrigerants

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015637A1 (fr) * 1995-10-20 1997-05-01 Tsinghua University Refrigerant

Also Published As

Publication number Publication date
AU3615193A (en) 1993-09-03

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