ES469024A1 - Mejoras introducidas en un sistema de compresor de refrige- racion centrifugo que lleva un refrigerante de halocarburo - Google Patents

Mejoras introducidas en un sistema de compresor de refrige- racion centrifugo que lleva un refrigerante de halocarburo

Info

Publication number
ES469024A1
ES469024A1 ES469024A ES469024A ES469024A1 ES 469024 A1 ES469024 A1 ES 469024A1 ES 469024 A ES469024 A ES 469024A ES 469024 A ES469024 A ES 469024A ES 469024 A1 ES469024 A1 ES 469024A1
Authority
ES
Spain
Prior art keywords
castor oil
halocarbon
parts
systems employing
refrigeration system
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
Application number
ES469024A
Other languages
English (en)
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of ES469024A1 publication Critical patent/ES469024A1/es
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
    • C10M171/008—Lubricant compositions compatible with refrigerants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication especially adapted for liquid pumps
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
    • C10M2207/046—Hydroxy ethers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/286—Esters of polymerised unsaturated acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/287—Partial esters
    • C10M2207/289—Partial esters containing free hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/402—Castor oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/06—Instruments or other precision apparatus, e.g. damping fluids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/30—Refrigerators lubricants or compressors lubricants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/32—Wires, ropes or cables lubricants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/34—Lubricating-sealants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/36—Release agents or mold release agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/38—Conveyors or chain belts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/40—Generators or electric motors in oil or gas winning field
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/42—Flashing oils or marking oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/44—Super vacuum or supercritical use
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/50—Medical uses

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lubricants (AREA)

Abstract

Mejoras introducidas en un sistema de compresor de refrigeración centrífugo que lleva un refrigerante de halocarburo, incluyendo dicho sistema una envolvente de alojamiento con miembros de cojinete, un mecanismo de impulsión que comprende un árbol de impulsión, un motor y unos engranajes, y un circuito de flujo de refrigerante para lubricar el mecanismo de impulsión y los cojinetes, empleando dicho sistema un refrigerante de halocarburo combinado con una composición lubricante en contacto con el refrigerante de halocarburo, comprendiendo lubricante en contacto con el refrigerante de halocarburo, comprendiendo dicha composición: 100 partes de un aceite de ricino química y térmicamente estable, y de 20 partes a 110 partes de un fluido de mezclado de baja viscosidad, química y térmicamente estable, soluble en aceite de ricino y en forma de al menor uno de entre un éter difenílico alquilado, un éster neopentílico, un éter de pentaeritritol de un ácido graso saturado y un éster de dipentaeritritol de un ácido graso saturado, siendo dicho halocarburo solo ligeramente soluble en la composición lubricante y teniendo dicha composición lubricante una viscosidad de hasta 700 SUS a 38ºC.
ES469024A 1977-04-22 1978-04-21 Mejoras introducidas en un sistema de compresor de refrige- racion centrifugo que lleva un refrigerante de halocarburo Expired ES469024A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/789,907 US4159255A (en) 1977-04-22 1977-04-22 Modified castor oil lubricant for refrigerator systems employing halocarbon refrigerants

Publications (1)

Publication Number Publication Date
ES469024A1 true ES469024A1 (es) 1980-10-01

Family

ID=25149069

Family Applications (1)

Application Number Title Priority Date Filing Date
ES469024A Expired ES469024A1 (es) 1977-04-22 1978-04-21 Mejoras introducidas en un sistema de compresor de refrige- racion centrifugo que lleva un refrigerante de halocarburo

Country Status (12)

Country Link
US (1) US4159255A (es)
JP (1) JPS5835557B2 (es)
AU (1) AU520718B2 (es)
BE (1) BE866111A (es)
CA (1) CA1098893A (es)
DE (1) DE2817031A1 (es)
ES (1) ES469024A1 (es)
FR (1) FR2388227A1 (es)
GB (1) GB1603134A (es)
IT (1) IT1095610B (es)
MX (1) MX148867A (es)
PH (1) PH14212A (es)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107252U (ja) * 1983-12-27 1985-07-22 株式会社　秀光 ドア−ハンドル軸の取付丸座
JPS61287987A (ja) * 1985-06-14 1986-12-18 Kao Corp 高温用潤滑油組成物
JPS61287986A (ja) * 1985-06-14 1986-12-18 Kao Corp 高温用潤滑油組成物
US4851144A (en) * 1989-01-10 1989-07-25 The Dow Chemical Company Lubricants for refrigeration compressors
JP2573111B2 (ja) * 1990-09-12 1997-01-22 花王 株式会社 冷凍機作動流体用組成物
JPH04225095A (ja) * 1990-12-27 1992-08-14 Matsushita Refrig Co Ltd 冷蔵庫用冷凍装置
EP0498152B1 (en) * 1991-01-17 1997-06-18 Cpi Engineering Services, Inc. Lubricant composition for fluorinated refrigerants
CA2060685A1 (en) * 1991-03-04 1992-09-05 Mahmood Sabahi Ether-ester lubricant
ATE195545T1 (de) * 1992-06-03 2000-09-15 Henkel Corp Schmiermittel auf basis von polyolester für kälteübertragungsmittel
US5976399A (en) 1992-06-03 1999-11-02 Henkel Corporation Blended polyol ester lubricants for refrigerant heat transfer fluids
US6183662B1 (en) 1992-06-03 2001-02-06 Henkel Corporation Polyol ester lubricants, especially those compatible with mineral oils, for refrigerating compressors operating at high temperatures
ATE184310T1 (de) * 1992-06-03 1999-09-15 Henkel Corp Polyol/ester-gemisch als schmiermittel für wärmeträgerflüssigkeiten in kälteanlagen
ATE194641T1 (de) * 1992-06-03 2000-07-15 Henkel Corp Polyolester als schmiermittel für hochtemperatur- kältekompressoren
US5853609A (en) * 1993-03-10 1998-12-29 Henkel Corporation Polyol ester lubricants for hermetically sealed refrigerating compressors
WO1995032266A1 (en) * 1994-05-23 1995-11-30 Henkel Corporation Increasing the electrical resistivity of ester lubricants, especially for use with hydrofluorocarbon refrigerants
US6008169A (en) * 1996-04-17 1999-12-28 Idemitsu Kosan Co., Ltd. Refrigerator oil composition comprising saturated hydroxy fatty acids and derivatives thereof
JP3983328B2 (ja) * 1996-04-26 2007-09-26 出光興産株式会社 冷凍機油組成物
US20010019120A1 (en) 1999-06-09 2001-09-06 Nicolas E. Schnur Method of improving performance of refrigerant systems
US8123974B2 (en) * 2006-09-15 2012-02-28 Shrieve Chemical Products, Inc. Synthetic refrigeration oil composition for HFC applications
US7842651B2 (en) * 2007-12-18 2010-11-30 Chengdu Cationic Chemistry Company, Inc. Silicate drilling fluid composition containing lubricating agents and uses thereof
US9353765B2 (en) * 2008-02-20 2016-05-31 Trane International Inc. Centrifugal compressor assembly and method
US8037713B2 (en) * 2008-02-20 2011-10-18 Trane International, Inc. Centrifugal compressor assembly and method
US20140000857A1 (en) * 2012-06-19 2014-01-02 William P. King Refrigerant repelling surfaces
DE102012023675A1 (de) 2012-12-03 2014-06-05 Hans-Erich Maul Gekühltes spielfreies Zahnradgetriebe
US8926939B2 (en) 2013-03-13 2015-01-06 Ecolab Usa Inc. Neopolyols suitable for crystal growth modification in the Bayer process
US10427950B2 (en) 2015-12-04 2019-10-01 Ecolab Usa Inc. Recovery of mining processing product using boronic acid-containing polymers
BE1025222B1 (nl) * 2017-05-04 2018-12-13 Atlas Copco Airpower Naamloze Vennootschap Overbrenging en compressor of vacuümpomp voorzien van dergelijke overbrenging
US20230358255A1 (en) * 2022-05-03 2023-11-09 General Electric Company Oil lubricated fluid pumps with oil separators

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2187388A (en) * 1935-09-06 1940-01-16 Gen Motors Corp Working fluid for refrigerating apparatus
GB779698A (en) * 1952-12-10 1957-07-24 Exxon Research Engineering Co Lubricant
US2922764A (en) * 1954-10-28 1960-01-26 Elgin Nat Watch Co Ricinoleyl lubricants
US2807155A (en) * 1956-02-02 1957-09-24 Gen Motors Corp Working fluids in refrigeration apparatus
US3715302A (en) * 1970-08-12 1973-02-06 Sun Oil Co Refrigeration oil composition having wide boiling range
US3704277A (en) * 1971-05-03 1972-11-28 Monsanto Co Polyphenyl ether lubricating compositions
JPS5043457A (es) * 1973-08-20 1975-04-19
US3878112A (en) * 1974-05-23 1975-04-15 Westinghouse Electric Corp Lubricant-refrigerant system for centrifugal refrigeration compressors

Also Published As

Publication number Publication date
US4159255A (en) 1979-06-26
JPS5835557B2 (ja) 1983-08-03
MX148867A (es) 1983-06-28
FR2388227A1 (fr) 1978-11-17
IT7822610A0 (it) 1978-04-21
JPS53143609A (en) 1978-12-14
PH14212A (en) 1981-04-02
DE2817031A1 (de) 1978-10-26
AU3509978A (en) 1979-10-18
CA1098893A (en) 1981-04-07
FR2388227B1 (es) 1985-04-12
IT1095610B (it) 1985-08-10
BE866111A (fr) 1978-10-18
GB1603134A (en) 1981-11-18
AU520718B2 (en) 1982-02-25

Similar Documents

Publication Publication Date Title
ES469024A1 (es) Mejoras introducidas en un sistema de compresor de refrige- racion centrifugo que lleva un refrigerante de halocarburo
US3092981A (en) Refrigeration apparatus
KR960017827A (ko) 냉동기 오일 조성물 및 이를 사용한 압축기
JP2514090B2 (ja) 冷凍冷蔵装置用潤滑油組成物
WO2003044137A3 (en) A lubricating composition containing a blend of a polyol ester and an alkylbenzene
EP0626443A4 (en) AMMONIAC REFRIGERATION UNIT, WORKING FLUID COMPOSITION FOR THIS UNIT AND LUBRICATION OF THE AMMONIAC COMPRESSOR.
EP0432273A4 (en) Refrigerant composition
JPH01271491A (ja) カーエアコン用冷凍機油組成物
EP0842999A4 (en) ADDITIVES FOR EXTREME PRESSURES, FRICTION COEFFICIENT MODIFIER AND FUNCTIONAL FLUIDS
KR910000986A (ko) 윤활제 냉각 조성물 및 그를 사용한 윤활 개선 방법
Daniel et al. Performance of selected synthetic lubricants in industrial heat pumps
IL103107A (en) A mixture of 1,1,1-trifluoroethane, perfluoropropane and propane and the use of coolants, as propellants for aerosols and as foaming agents for plastic foams
ATE315073T1 (de) Kühlmittel für super tieftemperaturkühlung
Khan et al. Thermodynamic analyses of the CFC-12 and HFC-134a refrigeration cycles
JPH0322439B2 (es)
Safari et al. Wear behaviour of the piston/gudgeon pin in a hermetic compressor with replacement CFC refrigerants
KR950014275A (ko) 냉동기용 윤활유 조성물
JPS6259695A (ja) 冷凍機用潤滑油
JPH02132178A (ja) 圧縮式冷凍機用組成物
GB1379956A (en) Compressor refrigerator systems
Snyder Jr Structural Modifications of Fluoro-alkyl S-Triazines and Their Lubricant Properties
JPH0376791A (ja) 圧縮機
JPS62124193A (ja) 冷凍機油組成物
JPH02132176A (ja) 圧縮式冷凍機用組成物
Badr et al. Thermal stabilities of mixtures of trichlorofluoroethane and lubricating fluids contained in copper sealed tubes