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ＨＦＣ－２２７ｅａ是一种有希望的新环保制冷剂，特别是作为混合物中的一种组元用于Ｒ２２和Ｒ５０２的替代，但其热物性数据十分有限。本文使用膨胀定容法高精度地测量了ＨＦＣ－２２７ｅａ的气相ＰＶＴ性质，沿定温线外推确定了其第二和第三维里系数，并与文献值进行了比较；使用截断维里方程，根据本文所确定的维里系数，可以高精度地再现ＨＦＣ－２２７ｅａ的气相区热力性质。
HFC-227ea is a promising new environmentally friendly refrigerant, especially as an alternative to R22 and R502 as a component in blends, but its thermal properties are limited. In this paper, the gas-phase PVT properties of HFC-227ea were measured with high-precision expansion method, and the second and third virial coefficients of HFC-227ea were determined by extrapolation along the temperature line and compared with the literature values. Using the truncated Villi equation, The Veri? Cian coefficient determined in this paper can reproduce the gas-phase thermodynamic properties of HFC-227ea with high accuracy.