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STUDY ON THE THERMOPHYSICAL PROPERTIES IN MIXTURES OF NON-CHLORINE HYDROCARBON REFRIGERaNTS

Research Project

Project/Area Number 04650854
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 化学工学
Research InstitutionKYOTO INSTITUTE OF TECHNOLOGY

Principal Investigator

TAKAGI Toshiharu  KYOTO INSTITUTE OF TECHNOLOGY, FACULTY OF ENGINEERING AND DESIGN, CHEMISTRY AND MATERIALS TECHNOLOGY, INSTRUCTOR, 工芸学部, 助手 (20027816)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1992: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsALTERNATIVE REFRIGERANT / BINARY MIXTURE / VAPOR PRESSURE / ULTRASONIC SPEED / PVT / 代替フロン
Research Abstract

Among hydrochlorofluorocarbons, HCFCls, chlorodifluoromethane, CHCIF_2 (HCFC-22, critical temperature, T_c=369.30 K ; critical pressure, p_c=4.988MPa) is widely used today as working fluidsinair-conditioning and refrigeration technology. The ozone depletion potential, ODP, due to the evolution of HCFCs, is presumed to be the comparatively lower compared with those for chlorofluorocarbons, CFCs. However, wity the use in a large quantity of HCFC-22 including chlorine atom, the various harmful influences giving to the earth environmental are anxious in the near future. Suitable replacement compounds for CHCIF_2 may be trifluoromethane, CHF_3 (HFC-23), difluoromethane, CH_2F_2 (HFC-32), pentafluoroethane CHF_2CF_3 (HFC-125) and 1,1,1,2-tetrafluoroethane, CF_3CH_2F (HFC-134a), which those have nearly the same vapor pressures and critical parameters with those for CHCIF_2, and/or their binary mixtures.
In this project, the vapor pressure, ultrasonic speed and density (PVT) in the liquid phase for binary mixtures of CHF_3+CF_3CH_2F and CH_2F_2+CF_3CH_2F were measured along isotherms from 243 to 333 K and at pressures up to about 30MPa. A sing-around technique were used for the measurement of vapor pressure and ultrasonic speed. And the density (PVT) was observed by a direct weighing technique. The temperature, pressure and/or composition variations for these values are found to give a powerful clue to measure the thermophysical properties for each system of binary mixtures. The results obtained in the lower region of CH_2F_2 + CF_3CH_2F system, which indicated the nearly same properties, may be noted as a alternative fluid of chlorodufluoromethane CHCIF_2.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Toshiharu Takagi: "Ultrasonic spedds in liquid difluoromethane under high pressures" High Temperatures High Pressures. (発表予定). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Toshiharu Takagi: "Ultrasonic speed in trichloromethane and dichloromethane and their thermodynamic properties under high pressures" Current Japanese Materials Research Vol.13 High Pressure Liquid and Solutions. (発表予定). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Kenji Mishima: "Bubble point pressures fro chlorodifluoromethane +1,2-dichloro-1,1,2,2-tetrafluoroethane" Journal of Chemical and Engineering Data. 38. 49-52 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Toshiharu Takagi: "Ultrasonic speed in liquid 1,1-dichloro-1-trifluoroethane at temperatures from 283 to 373K and up to 75MPa" Journal of Chemical and Engineering Data. 38. 60-62 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.TAKAGI: "ULTRASONIC SPEED IN LIQUID DIFLUOROMETHANE UNDER HIGH PRESSURES" HIGH TEMP.-PRES. (inpress).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.TAKAGI: " : ULTRASONIC SPEED IN TRICHLOROMETHANE AND DICHLOROMETHANE AND THEIR THERMODYNAMIC PROPRTIES UNDER HIGH PRESSURE" CUR.JPN.MAT.RES. VOL.13 (inpress).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.MISHIMA: "BUBBLE POINT PRESSURE FOR CHLORODIFLUOROMETHANE + 1,2-DICHLORO-1,1,2,2-TRIFLUOROMETHANE AND" J.CHEM.ENG.DATA. 38. 49-52 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.TAKAGI: "ULTRASONIC SPEED IN LIQUID 1,1-DICHLORO-1-TRIFLUOROETHANE AT TEMPERATURES FROM 283 TO 373K AND UP TO 75MPA" J.CHEM.ENG.DATA. 38. 60-62 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Toshiharu Takagi: "Ultrasonic spedds in liquid difluoromethane under high pressures" High Temperatures High Pressures. (発表予定). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Toshiharu Takagi: "Ultrasonic speed in trichloromethane and dichloromethane and their thermodynamic properties under high pressures" Current Japanese Materials Reserch Vol.13 High Pressure Liquid and Solutions. (発表予定). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Kenji Mishima: "Bubble point pressures fro chlorodifluoromethane+1,2-dichloro-1,1,2,2-tetrafluoroethane" Journal of Chemical and Engineering Data. 38. 49-52 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Toshiharu Takagi: "Ultrasonic speed in liquid 1,1-dichloro-1-trifluoroethane at temperatures from 283 to 373K and up to 75MPa" Journal of Chemical and Engineering Data. 38. 60-62 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Toshiharu Takagi: "Ultrasonic speeds in liquid chlorodifluoromethane and 1,1,1,2-tetrafluoroethane under high pressures." Journal of Chemical and Engineering Data.

    • Related Report
      1992 Annual Research Report
  • [Publications] Toshiharu Takagi: "Ultrasonic speeds in liquid difluoromethane under high pressures." International Journal of Thermophysics.

    • Related Report
      1992 Annual Research Report
  • [Publications] Toshiharu Takagi: "Ultrasonic speeds in liquid 1,2-dichloro-1,2,2-trifluoromethane from 283 to 373K and 75MPa" Journal of Chemical and Engineering Data. 37. 39-41 (1932)

    • Related Report
      1992 Annual Research Report
  • [Publications] Toshiharu Takagi: "Ultrasonic speeds in liquid 1,1-dichloro-1-fluoroethane at temperatures from 283 to 373K and up to 50MPa." Journal of Chemical and Engineering Data. 38. 60-62 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Kenji Mishima: "Bubble point pressures for chlorodifluoromethane+1,2-dichloro-1,1,2,2-tetrafluoroethane,bromotrifluoromethane+1,2,dichloro1,1,2,2-tetrafluoroethane,and---." Journal of Chemical and Engineering Data. 38. 49-52 (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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