US20090045375A1 - Refrigerant Composition - Google Patents

Refrigerant Composition Download PDF

Info

Publication number
US20090045375A1
US20090045375A1 US12/067,429 US6742906A US2009045375A1 US 20090045375 A1 US20090045375 A1 US 20090045375A1 US 6742906 A US6742906 A US 6742906A US 2009045375 A1 US2009045375 A1 US 2009045375A1
Authority
US
United States
Prior art keywords
refrigerant
carbon dioxide
dimethyl ether
temperature
pressure
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.)
Abandoned
Application number
US12/067,429
Other languages
English (en)
Inventor
Seijyuro Maiya
Osamu Nakagome
Hideyuki Suzuki
Yasuhisa Kotani
Toshifumi Hatanaka
Toshihiro Wada
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.)
Japan Petroleum Exploration Co Ltd
Toyota Tsusho Corp
Showa Denko Gas Products Co Ltd
Original Assignee
Japan Petroleum Exploration Co Ltd
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 Japan Petroleum Exploration Co Ltd filed Critical Japan Petroleum Exploration Co Ltd
Assigned to TOYOTA TSUSHO CORPORATION, SHOWA TANSAN CO., LTD., JAPAN PETROLEUM EXPLORATION CO., LTD. reassignment TOYOTA TSUSHO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WADA, TOSHIHIRO, HATANAKA, TOSHIFUMI, NAKAGOME, OSAMU, MAIYA, SEIJYURO, KOTANI, YASUHISA, SUZUKI, HIDEYUKI
Publication of US20090045375A1 publication Critical patent/US20090045375A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • 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
    • C09K2205/106—Carbon dioxide
    • 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
    • C09K2205/11—Ethers
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/006—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant containing more than one component

Definitions

  • the present invention relates to a refrigerant composition containing dimethyl ether and carbon dioxide used for a heat pump hot water supply.
  • Carbon dioxide has zero ozone-depleting potential, global warming potential of exactly 1 and extremely small environmental load as well as absence of toxicity, and flammability, safety, low price, and a low critical temperature of 31.1° C. Since in an air conditioning system and a hot-water system, heating can be performed even in a small temperature difference between the refrigerant and the refrigerated fluid due to readily attaining the supercritical point in a high pressure side of the cycling.
  • An object of the present invention is to provide a safe, non-toxic refrigerant composition for hot water supply/heating as an alternative to carbon dioxide supercritical refrigerant.
  • Such refrigerant composition has a small risk for depleting the ozone layer, has small damaging effect on the global warming, exhibits incombustibility or fire retardancy, and operates at lower pressures while exhibiting excellent performance.
  • Carbon dioxide has a critical temperature of 31.1° C. and a boiling point of ⁇ 56.6° C.
  • dimethyl ether has a critical temperature of 126.85° C. and a boiling point of ⁇ 25° C., indicating a great difference between the two in their physical property.
  • carbon dioxide is utilized as a refrigerant in a very high pressure region such as low pressure at about 3 MPa to high pressure at about 10 MPa
  • dimethyl ether is utilized as a refrigerant in a comparatively low pressure region such as low pressure at about 0.7 MPa to high pressure at about 2 MPa, and is known to exert best performance as the refrigerant under such pressure condition. Consequently, although carbon dioxide and dimethyl ether have been used alone as the refrigerant, an idea of trying to utilize as the refrigerant by mixing carbon dioxide and dimethyl ether having completely different properties has not been made or examined.
  • the present inventors have tried to perform an assessment test and a macroscopic test on solubility of carbon dioxide in dimethyl ether and have confirmed that although the amount of mass transfer (dissolved amount) to gas-liquid equilibrium is changed depending on the conditions of temperature and pressure, carbon dioxide was dissolved and diffused well in dimethyl ether.
  • the present inventors have considered the possibilities of obtaining physical properties showing extremely high thermal efficiency by mixing carbon dioxide which has physically high efficiency of heat transfer (0.02 W/mK) and dimethyl ether which has higher specific heat (138 J/molK), continued the development and simulation, and found that the mixture of dimethyl ether and carbon dioxide was a refrigerant for heating/hot water supply which could operate at low pressure while exhibiting excellent coefficient of performance, and completed the present invention.
  • the present invention relates to a refrigerant composition for hot water supply/heating comprising 1 to 10% by mole of dimethyl ether and 99 to 90% by mole of carbon dioxide on the basis of the total number of moles of dimethyl ether and carbon dioxide.
  • a mixture of dimethyl ether and carbon dioxide of the present invention is a refrigerant which has superior heating and hot water supplying ability, does not deplete the ozone layer, has almost zero global warming potential (GWP), is safe and non-toxic, and operates at low pressure while exhibiting excellent performance.
  • GWP global warming potential
  • FIG. 1 is a Pattern diagram of hot water supply system
  • FIG. 2 is a DME CO 2 B programming flow-chart.
  • Dimethyl ether used in the refrigerant composition of the present invention can be obtained by synthesizing dimethyl ether directly from hydrogen and carbon monoxide or indirectly from hydrogen and carbon monoxide through methanol synthesis by utilizing raw materials of a coal gasification gas, a BOG (boil of gas) of LNG tank, natural gases, by-product gases from a steel plant, oil residues, waste products and biogas.
  • Carbon dioxide used in the refrigerant composition of the present invention can be obtained by compression, liquefaction and purification of ammonium synthesis gas and by-product gas as the raw material generated from a hydrogen manufacturing plant for desulfurization of fuel oil.
  • a mixing ratio of dimethyl ether and carbon dioxide in the refrigerant composition of the present invention is appropriately determined depending on types of a hot water supply/heater in which the refrigerant is used.
  • the refrigerant composition of the present invention contains, on the basis of the total number of moles of dimethyl ether and carbon dioxide, preferably dimethyl ether at 1 to 10% by moles and carbon dioxide at 99 to 90% by moles, more preferably dimethyl ether at 3 to 8% by moles and carbon dioxide at 97 to 92% by moles. If a ratio of dimethyl ether is less than 1% by mole, a coefficient of the performance hereinafter described decreases, and it is not preferred as an effect of adding dimethyl ether is not exhibited.
  • the ratio of dimethyl ether is more than 10% by moles, since the refrigerant composition is out of an inflammable range, it is unfavorable on safety reason when particularly high safety standard is required (for example, a direct leakage system in which a refrigerant filling unit exists in a room or use in a place such as in a room where the space is sealed).
  • the mixing ratio of the refrigerant composition of the present invention can be obtained, for example, by filling a predetermined amount of liquid dimethyl ether in a vessel from a tank filled with liquid dimethyl ether, subsequently filling a predetermined amount of liquid carbon dioxide thereto from a tank filled with liquid carbon dioxide. Further, after filling the predetermined amount of liquid dimethyl ether in the vessel, the refrigerant composition of the present invention can be prepared by such that carbon dioxide gas is filled into the gas phase part of the vessel and is dissolved and mixed under pressure into dimethyl ether.
  • water as another additive can be added. Since water can be dissolved about a little over 7% by mole in dimethyl ether under the conditions of 1 atmospheric pressure at 18° C., and has the characteristics of higher vaporization (condensation) latent heat as well as having a small rate of temperature change to the vaporization latent heat due to a high critical point, as a result large latent heat can be obtained even in a high-temperature region. Consequently, it is estimated to obtain further high thermal efficiency by admixing three types of substance, i.e. carbon dioxide having high sensible heat effect, and dimethyl ether and water both having high latent heat effect. A ratio of mixing water in this case is determined not to exceed 7% by mole in consideration of solubility to dimethyl ether.
  • a hot water supply system is generally composed of a compressor, a condenser, an extender and a vaporizer as shown in FIG. 1 , and hot water for hot water supply is generated by performing heat exchange between a high temperature refrigerant from the compressor and cold water at condenser.
  • a working pressure in the condenser side becomes supercritical (CO 2 critical pressure: 7.4 MPa) at a high pressure of 9 MPa or more in the CO 2 refrigerant hot water supply cycle, the working pressure of the vaporizer in the low pressure side constitutes transition critical cycle of 3 MPa or more.
  • Simulation for hot water supply performance of CO 2 /DME refrigerant In order to evaluate hot water supply performance of a_CO 2 /DME refrigerant, a numerical model of a standard cycle for hot water supply in FIG. 1 is prepared, and using a general-purpose simulation system for a numerical chemical process, the hot water supply performance of the CO 2 /DME refrigerant can be analyzed and evaluated by the known method (e.g. see Miyara et al., “Effect of heat transfer characteristics of heat exchanger on non-azeotropic mixture refrigerant heat pump cycle,” Transactions of the Japanese Association of Refrigeration, 7(1): 65-73, 1990).
  • the general-purpose simulation system for the numerical chemical process stores database of thermodynamic properties of various components, and equilibrium thermodynamic calculation on interaction of chemical components corresponding to a mechanical engineering function of various systems can be performed.
  • a system circulating the refrigerant composed of a compressor, a circulator, an expander and a vaporizer is expressed numerically, and the hot water supply performance is evaluated as coefficient of performance (COP) by using parameters of output pressure of compressor (P 1 ), discharge temperature of condenser (T 2 ), temperature of a vaporizer (T 3 ) and molar concentration of dimethyl ether/CO 2 .
  • COP coefficient of performance
  • Hot water supply COP total amount of exhaust heat of refrigerant in condenser ⁇ amount of power of compressor
  • the present invention can be highly precisely evaluated by applying, preferably as an estimate equation for thermodynamic physical value of refrigerant, regular solution model with respect to dissolution and SRK (Soave-Redlich-Kwong) equation of state with respect to the equation of state, respectively.
  • SRK Soave-Redlich-Kwong
  • the refrigerant composition of the present invention can be fundamentally used directly in conventional carbon dioxide heat pump water supply known as naming of ecocute. However, considering the physical properties of the refrigerant of the present invention, a mechanical aspect of a condenser, a piston, etc. can be appropriately improved and designed in conformity with the refrigerant composition of the present invention.
  • the pressure vessel was shaken up and down for completely mixing DME/CO 2 , and the test was performed after allowing to stand vertically.
  • Results obtained are shown in Table 1.
  • values of K-volume of CO 2 and DME are within the range of 0.66 ⁇ KDME ⁇ 0.80 and 2.59 ⁇ KCO 2 ⁇ 3.42, under the measuring conditions respectively, and it shows that carbon dioxide dissolves well in DME.
  • Coefficient of performance (COP) of the mixed refrigerant of dimethyl ether and carbon dioxide in the hot water supply system shown in FIG. 1 is obtained. Simulation using the simulation chemical system for the numerical process was performed by following operation procedure.
  • a quantity of state of stream (1) to (4) (volume, enthalpy, entropy, etc.) in the hot water supply system in FIG. 1 was determined by simulation to obtain coefficient of performance (COP) of the following equation.
  • H 1 total amount of exhaust heat of refrigerant in condenser (total amount of heat absorption of refrigerant in vaporizer+amount of power of compressor)
  • H 2 amount of power of compressor from (4) to (1)
  • the output pressure of the compressor (discharge pressure), P 1 , the output temperature of the condenser (discharge temperature), P 2 , the pressure of the vaporizer, P 3 and the mixing ratio of DME/CO 2 were used as fluctuating parameter for calculation.
  • an outlet temperature of the condenser of the refrigerant was set at 15° C.
  • Discharge temperature 130° C., 120° C., 100° C.
  • the simulation was performed by using the discharge pressure of the compressor (P 1 ), the discharge temperature and the pressure of the vaporizer (P 3 ) as fluctuating parameter.
  • an outlet temperature of the condenser of the refrigerant was set at 15° C.
  • Points to be considered are following three points.
  • DME is an oxygen containing low molecular weight compound
  • the boiling point of the representative substance, ethanol is 78° C.
  • that of DME is ⁇ 25° C., it can be understood that it has no strong polarity as compared with alcohol, aldehyde and ketone groups. Consequently, a regular dissolution model can be applied for ⁇ i (0) of DME.
  • SRK Soave-Redlich-Kwong
  • a bubble point was calculated under the given composition and P 1 (the output pressure of the compressor).
  • Tables 2-1 to 2-5 show simulation results at a discharge temperature of 130° C.
  • tables 3-1 to 3-5 show simulation results at a discharge temperature of 120° C.
  • Tables 4-1 to 4-5 show simulation results at a discharge temperature of 100° C.
  • DME/CO 2 4/96 (mol %) (discharge temperature: 120° C.) Total heat Amount of Discharge Discharge absorption amount power of Vaporization Vaporization pressure temperature in vaporizer compressor pressure temperature (° C.) (MPa) (° C.) (KCAL/H) (KCAL/H) (MPa) inlet/outlet COP 8.00 120.0 236490 97437 2.68 ⁇ 7.5/1.2 3.43 8.00 120.3 236530 97872 2.67 ⁇ 7.6/1.1 3.42 8.00 119.7 236460 97003 2.69 ⁇ 7.4/1.3 3.44 8.00 120.7 236560 98311 2.66 ⁇ 7.8/1.0 3.41
  • DME/CO 2 4/96 (mol %) (discharge temperature: 100° C.) Total heat Amount of Discharge Discharge absorption amount power of Vaporization Vaporization pressure temperature in vaporizer compressor pressure temperature (° C.) (MPa) (° C.) (KCAL/H) (KCAL/H) (MPa) inlet/outlet COP 7.00 100.0 233330 78249 2.80 ⁇ 5.9/2.6 3.98 7.00 98.5 233130 76333 2.85 ⁇ 5.3/3.2 4.05 7.00 97.6 233010 75205 2.88 ⁇ 4.9/3.6 4.10 7.00 97.0 232920 74462 2.90 ⁇ 4.7/3.8 4.13
  • the refrigerant composition of the present invention can be expected for utilization in the refrigerant for domestic hot water supply/heating system, the refrigerant for industrial air conditioning (heat pump) and refrigerating machine, and the refrigerant for heat pump utilizing geothermal heat to an alleviate heat-island phenomenon.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubricants (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US12/067,429 2005-09-27 2006-08-16 Refrigerant Composition Abandoned US20090045375A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2005-279209 2005-09-27
JP2005279209A JP5407053B2 (ja) 2005-09-27 2005-09-27 冷媒組成物
PCT/JP2006/316088 WO2007037073A1 (ja) 2005-09-27 2006-08-16 冷媒組成物

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/316088 A-371-Of-International WO2007037073A1 (ja) 2005-09-27 2006-08-16 冷媒組成物

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/876,799 Division US7976721B2 (en) 2005-09-27 2010-09-07 Refrigerant composition

Publications (1)

Publication Number Publication Date
US20090045375A1 true US20090045375A1 (en) 2009-02-19

Family

ID=37899507

Family Applications (2)

Application Number Title Priority Date Filing Date
US12/067,429 Abandoned US20090045375A1 (en) 2005-09-27 2006-08-16 Refrigerant Composition
US12/876,799 Expired - Fee Related US7976721B2 (en) 2005-09-27 2010-09-07 Refrigerant composition

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/876,799 Expired - Fee Related US7976721B2 (en) 2005-09-27 2010-09-07 Refrigerant composition

Country Status (9)

Country Link
US (2) US20090045375A1 (ru)
EP (1) EP1930391A4 (ru)
JP (1) JP5407053B2 (ru)
KR (1) KR20080059406A (ru)
CN (1) CN101273107B (ru)
CA (1) CA2623244A1 (ru)
NO (1) NO20081947L (ru)
RU (1) RU2405018C2 (ru)
WO (1) WO2007037073A1 (ru)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110017940A1 (en) * 2005-09-27 2011-01-27 Japan Petroleum Exploration Co., Ltd. Refrigerant Composition

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007145922A (ja) * 2005-11-25 2007-06-14 Japan Petroleum Exploration Co Ltd 冷媒組成物
JP2009008334A (ja) * 2007-06-28 2009-01-15 Showa Tansan Co Ltd 熱移動媒体及びそれを用いた伝熱装置
CN110484210A (zh) * 2019-08-23 2019-11-22 江苏蓝色星球环保科技股份有限公司 一种新型制冷剂

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6013609A (en) * 1995-07-10 2000-01-11 Idemitsu Kosan Co., Ltd. Refrigerator oil and process for lubrication using the refrigerator oil
US6231782B1 (en) * 1999-03-26 2001-05-15 Nippon Mitsubishi Oil Corp. Refrigerator oil composition
US20030146407A1 (en) * 2000-07-24 2003-08-07 Yuji Shimomura Refrigerating machine oil composition
US20050211949A1 (en) * 2003-11-13 2005-09-29 Bivens Donald B Detectable refrigerant compositions and uses thereof
US20070138433A1 (en) * 2003-11-13 2007-06-21 Drigotas Martin D Refrigerant compositions comprising UV fluorescent dye and solubilizing agent

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961321A (en) 1989-02-28 1990-10-09 W. R. Grace & Co.-Conn. Bis (difluoromethyl) ether refrigerant
JPH0532961A (ja) 1991-07-25 1993-02-09 Daikin Ind Ltd トリフルオロメタンを含む混合冷媒
JP2000096071A (ja) 1998-09-21 2000-04-04 Nippon Mitsubishi Oil Corp ジメチルエーテルを冷媒とする冷凍機用潤滑油
JP2000104085A (ja) * 1998-09-29 2000-04-11 Nippon Mitsubishi Oil Corp ジメチルエーテルを冷媒とする冷凍機用潤滑油
JP2001019944A (ja) * 1999-07-09 2001-01-23 Matsushita Electric Ind Co Ltd 低温作動流体とそれを用いた冷凍サイクル装置
CN1361226A (zh) * 2000-12-23 2002-07-31 刘鸿逵 一种致冷剂及其配制方法
JP4643836B2 (ja) * 2001-01-26 2011-03-02 Ｊｘ日鉱日石エネルギー株式会社 二酸化炭素冷媒用冷凍機油及び冷凍機用流体組成物
JP2002226839A (ja) 2001-01-29 2002-08-14 Kaneko Kagaku:Kk 冷 媒
JP2002235072A (ja) * 2001-02-09 2002-08-23 Matsushita Electric Ind Co Ltd 混合作動流体とそれを用いた冷凍サイクル装置
JP4686698B2 (ja) 2001-08-02 2011-05-25 株式会社パロマ ガス種判定方法
JP3866973B2 (ja) 2001-12-26 2007-01-10 積水化成品工業株式会社 スチレン系樹脂発泡体の製造方法
JP2003336916A (ja) * 2002-05-16 2003-11-28 Hitachi Home & Life Solutions Inc 冷凍サイクル及びヒートポンプ式給湯機
JP4212343B2 (ja) 2002-11-20 2009-01-21 タカラバイオ株式会社 きのこ栽培方法およびきのこ栽培設備
JP2006022305A (ja) * 2004-06-04 2006-01-26 Japan Petroleum Exploration Co Ltd ジメチルエーテルと二酸化炭素の混合物冷媒
JP2005344057A (ja) * 2004-06-04 2005-12-15 Japan Petroleum Exploration Co Ltd ジメチルエーテルと二酸化炭素の混合物冷媒
JP4693440B2 (ja) * 2005-03-01 2011-06-01 株式会社近代化成 道路舗装用エポキシ樹脂プライマー組成物とそれを用いた道路舗装方法
JP4680644B2 (ja) * 2005-03-22 2011-05-11 国立大学法人佐賀大学 ジメチルエーテルと二酸化炭素との混合物冷媒を利用した寒冷地対応ヒートポンプに多段エジェクタを組み込んだサイクルシステム
JP2007002119A (ja) * 2005-06-24 2007-01-11 Nkk Kk 二酸化炭素−ｄｍｅ混合ガスの製造方法
JP5407052B2 (ja) * 2005-08-17 2014-02-05 昭和電工ガスプロダクツ株式会社 冷媒組成物
JP5407053B2 (ja) 2005-09-27 2014-02-05 昭和電工ガスプロダクツ株式会社 冷媒組成物

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6013609A (en) * 1995-07-10 2000-01-11 Idemitsu Kosan Co., Ltd. Refrigerator oil and process for lubrication using the refrigerator oil
US6231782B1 (en) * 1999-03-26 2001-05-15 Nippon Mitsubishi Oil Corp. Refrigerator oil composition
US20030146407A1 (en) * 2000-07-24 2003-08-07 Yuji Shimomura Refrigerating machine oil composition
US20050211949A1 (en) * 2003-11-13 2005-09-29 Bivens Donald B Detectable refrigerant compositions and uses thereof
US20070138433A1 (en) * 2003-11-13 2007-06-21 Drigotas Martin D Refrigerant compositions comprising UV fluorescent dye and solubilizing agent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110017940A1 (en) * 2005-09-27 2011-01-27 Japan Petroleum Exploration Co., Ltd. Refrigerant Composition
US7976721B2 (en) 2005-09-27 2011-07-12 Japan Petroleum Exploration Co., Ltd. Refrigerant composition

Also Published As

Publication number Publication date
CN101273107A (zh) 2008-09-24
KR20080059406A (ko) 2008-06-27
US20110017940A1 (en) 2011-01-27
CA2623244A1 (en) 2007-04-05
WO2007037073A1 (ja) 2007-04-05
RU2008116594A (ru) 2009-11-10
JP5407053B2 (ja) 2014-02-05
EP1930391A4 (en) 2010-12-15
RU2405018C2 (ru) 2010-11-27
JP2007091772A (ja) 2007-04-12
NO20081947L (no) 2008-06-05
EP1930391A1 (en) 2008-06-11
US7976721B2 (en) 2011-07-12
CN101273107B (zh) 2010-05-26

Similar Documents

Publication Publication Date Title
Dong et al. Performance prediction of absorption refrigeration cycle based on the measurements of vapor pressure and heat capacity of H2O+[DMIM] DMP system
La Rocca et al. Experimental performance evaluation of a vapour compression refrigerating plant when replacing R22 with alternative refrigerants
US20110017941A1 (en) Refrigerant Composition
Donate et al. Thermodynamic evaluation of new absorbent mixtures of lithium bromide and organic salts for absorption refrigeration machines
Chen et al. Experimental study on R-22, R-427A, R-161 and R-290 in air-source heat pump for space heating at low ambient temperatures
De Lucas et al. Performance evaluation and simulation of a new absorbent for an absorption refrigeration system
Zhang et al. Determination of the optimum heat rejection pressure in transcritical cycles working with R744/R290 mixture
US7976721B2 (en) Refrigerant composition
Wu et al. Experimental investigations and multi-objective optimization of an air-source absorption heat pump for residential district heating
Zhang et al. Performance analysis of a novel compression-assisted absorption power and refrigeration system with selected 1, 1-difluoroethane/ionic liquid
Peng et al. Experimental investigation and comparison on heating performance characteristics of two transcritical CO2 heat pump systems
Ma et al. Study on the working medium of high temperature heat pump suitable for industrial waste heat recovery
US20070267597A1 (en) Refrigerant Mixture of Dimethyl Ether and Carbon Dioxide
JP2006241221A (ja) カーエアコン用冷媒組成物
Yulianto et al. Performance assessment of an R32 commercial heat pump water heater in different climates
Liu et al. The occurrence of pinch point and its effects on the performance of high temperature heat pump
US20090267018A1 (en) Refrigerant Composition
WO2005118738A1 (ja) ジメチルエーテルと二酸化炭素の混合物冷媒
Wu et al. Vapor Pressure Measurement of Ternary {KNO3+[Emim] Cl+ H2O},{KNO3+[Emim] Ac+ H2O},{KNO3+[Emim] NO3+ H2O}, and {KNO3+[Emim] Br+ H2O} Systems
Zhang et al. Life cycle climate performance of R410A and its environmentally friendly alternative working fluids in a heat pump system
Ji et al. Optimizing working fluids for advancing industrial heating performance of compression-absorption cascade heat pump
Stutz et al. Experimental Study on the Effect of [Dmim][Cl] Ionic Liquid as Anti-Crystallization Additive in a Bi-Adiabatic H2o-Libr Absorption Chiller Prototype

Legal Events

Date Code Title Description
AS Assignment

Owner name: JAPAN PETROLEUM EXPLORATION CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MAIYA, SEIJYURO;NAKAGOME, OSAMU;SUZUKI, HIDEYUKI;AND OTHERS;REEL/FRAME:021000/0974;SIGNING DATES FROM 20080407 TO 20080502

Owner name: SHOWA TANSAN CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MAIYA, SEIJYURO;NAKAGOME, OSAMU;SUZUKI, HIDEYUKI;AND OTHERS;REEL/FRAME:021000/0974;SIGNING DATES FROM 20080407 TO 20080502

Owner name: TOYOTA TSUSHO CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MAIYA, SEIJYURO;NAKAGOME, OSAMU;SUZUKI, HIDEYUKI;AND OTHERS;REEL/FRAME:021000/0974;SIGNING DATES FROM 20080407 TO 20080502

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION