低GWP作動流体HFO1234ze(Z)の臨界定数の測定

抄録

For effective energy utilization, power plants using organic Rankine cycle and high temperature heat pump systems are expected. The working fluids for their systems are needed to have low GWP (Global Warming Potential). So HFC245fa, existing working fluids, should be substituted. HFO1234ze(Z) is one of alternative to HFC245fa because it has a low GWP value and thermophysical properties of HFO1234ze(Z) are similar to that of HFC245fa. However, the experimental data of critical parameters, which are key property of thermophysical properites, is limited for HFO1234ze(Z). In this work, critical parameters of HFO1234ze(Z) are measured using the optical cell.