THERMAL CONDUCTIVITY OF SATURATED LIQUID OF HFO-1234ze(E) AND HFO-1234ze(E)+HFC-32 MIXTURE

Thermal conductivities of saturated liquid of HFO-1234ze(E), HFC-32, and their mixture have been measured with the transient hot wire method where long and short platinum wires with 15 mu m of diameter are used to eliminate the end effect at junctions. Measurements were conducted under the condition of saturated temperature from 10 degrees C to 80 degrees C though it is limited under the critical temperature. Measured values of HFC-32 agree well with literature value with in +/- 2% error which proves the reliability of present measurement. The thermal conductivity of HFO-1234ze(E) is lower than HFC-32 and it varies from 79 mW/(m.K) to 57 mW/(m.K) for the temperature from 10 degrees C to 80 degrees C. The thermal conductivity of mixture is between the both pure refrigerants and it is slightly lower than linearly interpolated value.