R1234ze(E)+R32 および R1234yf+R32 混合冷媒の飽和液の熱伝導率測定

抄録

Thermal conductivities of saturated liquid of R1234ze(E), R1234yf, R32, R1234ze(E)+R32, and R1234yf+R32 have been measured with the transient hot wire method where long and short platinum wires with 15μm of diameter are used to eliminate the end effect at junctions. Measurements were conducted under saturated liquid conditions of which temperatures are from 10°C to 80°C though it is limited under the critical temperature. The thermal conductivity of R1234ze(E) is lower than that of R32 and it varies from 79 mW/(m·K) to 57 mW/(m·K) for the temperature from 10°C to 80°C. The thermal conductivity of R1234yf is also lower than that of R32 and it varies from 68 mW/(m·K) to 49 mW/(m·K) for the temperature from 10°C to 80°C. The thermal conductivities of both mixtures are between the pure refrigerants and they are slightly lower than linearly interpolated values.