Measurement of Isobaric Heat Capacity of Gaseous Trans-1,3,3,3-tetrafluoropropene (HFO 1234ze (E) )

  • KAGAWA Noboru
    Department of Mechanical Systems Engineering, Faculty of Systems Engineering, National Defense Academy
  • MATSUGUCHI Atsushi
    Department of Mechanical Systems Engineering, Faculty of Systems Engineering, National Defense Academy
  • WATANABE Koichi
    Department of Mechanical Systems Engineering, Faculty of Systems Engineering, National Defense Academy

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The specific isobaric heat capacity (cp) was measured for HFO-1234ze(E) (trans-1,3,3,3-tetrafluoropropene) in the gas phase. HFO-1234ze(E) has a lower GWP value of 6 and is one of new environment-friendly refrigerants. Nineteen measurements for HFO-1234ze(E) were obtained at temperatures from 303 K to 363 K and at pressures from 0.35 MPa to 1.3 MPa. The expanded uncertainty (k=2) of the temperature measurements is estimated to be less 22 mK, and that of the pressure measurements is less 4.4 kPa. The expanded uncertainty for cp is estimated to range from 14 to 21 J.kg-1.K-1.

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