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

Abstract

The specific isobaric heat capacity (c_p) 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 c_p is estimated to range from 14 to 21 J.kg^-1.K^-1.