In order to develop a new refrigerant candidate to replace R410A or R32 used in domestic room air-conditioners, it is necessary to find novel substances with negligibly low GWP and low boiling-point temperatures. HFO-1123 (trifluoroethene) is one of the promising candidates because of its negligible GWP ( < 1) and slightly lower boiling-point temperature than R410A and R32. Although HFO-1123 has some disadvantages such as disproportionation reaction and weak flammability, it is expected to be a component of low-GWP refrigerant mixtures. In the present study, a set of vapor pressures and pρT properties of HFO-1123 was experimentally obtained. A single-sinker magnetic levitation densimeter (MLD) was used to obtain 57 gas-phase pρT properties at temperatures ranging from 260 K to 400 K. In the liquid-phase, 33 density data were obtained at temperatures from 260 K to 340 K and pressures up to 7 MPa. Based on the measurment results, a set of equations of state for single phase was developed.

为了开发一种新的制冷剂替代品来代替家用空调器中使用的R410A或R32，有必要找到GWP值低且沸点低的新型物质。HFO-1123（三氟乙烯）是有希望的候选物之一，因为它的GWP（<1）可忽略不计，并且沸点温度比R410A和R32略低。尽管HFO-1123具有一些缺点，例如歧化反应和易燃性，但它有望成为低GWP制冷剂混合物的组成部分。在本研究中，通过实验获得了一组HFO-1123的蒸气压和pρT特性。单沉磁悬浮密度计（MLD）用于获得57个气相pρT在260 K至400 K的温度范围内具有良好的性能。在液相中，在260 K至340 K的温度和最高7 MPa的压力下获得了33个密度数据。基于测量结果，开发了一组单相状态方程。