Abstract A modified heat conduction calorimeter was developed and utilized in experiments using a quasi-scanning method. The isobaric heat capacities of R143a and R227ea in the liquid phase were measured at a maximum pressure over 5 MPa and temperatures of 310.15 K–365.15 K, respectively. The relatively expanded uncertainties of the measurements were estimated to be 0.030 and 0.029 for R143a and R227ea, respectively.The measurements resulted in 27 data points for R143a and 53 data points for R227ea. All experimental data were correlated with an empirical equation. The equations showed AAD% (Average Absolute Deviations (%)) of 0.32 % and 0.27 % between the experimental and calculated values of the correlated equations for R143a and R227ea, respectively. In addition, the MAD% (Maximum Absolute Deviations (%)) for R143a and R227eawere 1.01 % and 1.14 %, respectively. Heat capacity values of R143a and R227ea in the saturated liquid state were obtained by extrapolation of the correlated equations. Furthermore, comparisons were drawn between the measured values and those reported in literature.

中文翻译：

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R143a和R227ea液相等压热容的准稳态扫描测量

摘要 研制了一种改进型热传导量热仪，并用于准扫描法实验。R143a 和 R227ea 在液相中的等压热容分别在超过 5 MPa 的最大压力和 310.15 K–365.15 K 的温度下测量。R143a 和 R227ea 的测量值相对扩大的不确定性估计分别为 0.030 和 0.029。测量结果产生了 R143a 的 27 个数据点和 R227ea 的 53 个数据点。所有实验数据都与经验方程相关。方程显示，R143a 和 R227ea 的相关方程的实验值和计算值之间的 AAD%（平均绝对偏差 (%)）分别为 0.32% 和 0.27%。此外，R143a 和 R227ea 的 MAD%（最大绝对偏差 (%)）分别为 1.01% 和 1。分别为 14%。R143a 和 R227ea 在饱和液态下的热容量值是通过相关方程的外推获得的。此外，还对测量值与文献报道的值进行了比较。