提出了三氟甲烷（R-23）热力学性质的计算公式。该方程适用于压力高达120 MPa（17400 psia）时，从-115.13°C（-247.23°F）到200°C（392°F）的三相和饱和状态。该公式包括一个基本方程和用于估计饱和特性的辅助函数。用于确定基本方程的实验数据包括压力密度-温度（P-r-T）、等压热容（Cr-P-T）、等容热容（Cv-r-T）、饱和热容（Csat）、声速（w-P-T）和蒸汽压。根据辅助函数计算的饱和值用于确保汽液相边界处的热力学一致性。将实验数据与使用该公式计算的值进行比较，以验证计算特性中的不确定性。 给出的公式可用于计算密度在±0.2%以内，热容在±1%以内，声速在±0.5%以内，饱和值在±0.2%以内，临界点附近除外。单位:双引文:研讨会，ASHRAE交易，第106卷，pt。1.

A formulation for the thermodynamic properties of trifluoromethane (R-23) is presented. The equation is valid for single-phase and saturation states from the triple point, -115.13°C (-247.23°F) to 200°C (392°F) at pressures up to 120 MPa (17,400 psia). The formulation includes a fundamental equation and ancillary functions for the estimation of saturation properties. The experimental data used to determine the fundamental equation included pressure-density- temperature (P-r-T), isobaric heat capacity (Cr- P-T), isochoric heat capacity (Cv-r-T), saturated heat capacity (Csat), speed of sound (w-P-T), and vapor pressure. Saturation values computed from the ancillary functions were used to ensure thermodynamic consistency at the vapor-liquid phase boundary. Comparisons between experimental data and values computed using the formulation are given to verify the uncertainties in the calculated properties. The formulation presented may be used to compute densities to within ±0.2%, heat capacities to within ±1%, speed of sound to within ±0.5%, and saturation values to within ±0.2%, except near the critical point.Units: Dual