制冷剂的理论性能是根据假定在固定制冷循环中运行的任何制冷剂的物理和热力学性质计算的。这些理论值代表了制冷剂在循环中的最佳性能特征，并假设了一个具有完美效率的理想机械系统。这类数据的用途和应用很多。设计工程师和科学家使用理论性能数据来确定制冷剂在冷却循环中可获得的最大效率，也有助于评估和比较在相同循环条件下运行的两种或两种以上制冷剂的理想性能特征。此外，理论性能值与实验观察值的比较提供了制冷设备效率的一个衡量标准。 虽然氟碳制冷剂的物理性质和热力学数据的大量表格已有一段时间，但没有相应的理论性能数据表格可用。以前，除了一些标准条件外，工程师和科学家必须为感兴趣的制冷循环选择合适的数据，并手动计算给定条件下每种制冷剂的性能数据。为了消除这种繁琐的手动计算的需要，已经准备了一个通用计算机程序，该程序可以精确计算假定在固定制冷循环中运行的任何给定制冷剂的性能数据。使用该通用程序，计算了制冷剂12和22在工业应用中的性能数据。使用数字计算机计算性能特性时，需要将每种制冷剂的物理特性数据和热力学方程完全转换为通用数学模型，该模型描述并数学模拟了制冷系统中的条件。 基于物理系统的这种数学表示，针对特定制冷剂的适当方程式和热力学表达式适用于性能数据实际计算的逻辑流序列。本文详细介绍了用于计算制冷剂12和22性能数据的通用计算机程序。引用:ASHRAE交易，第76卷，第1部分，旧金山，CA

Theoretical performance properties of refrigerants are calculated on the basis of physical and thermodynamic properties of any refrigerant assumed to be operating in a fixed refrigeration cycle. These theoretical values represent the optimum performance characteristics of the refrigerant in the cycle and assume an ideal mechanical system with perfect efficiency. The uses and applications of this type of data are numerous. Theoretical performance data are used by design engineers and scientists to determine the maximum obtainable efficiency of the refrigerant in a cooling cycle, and are also useful in evaluating and comparing the ideal performance characteristics of two or more refrigerants operating under the same cycle conditions. Further, comparisons of the theoretical performance values with those observed experimentally provide one measure of the efficiency of the refrigeration apparatus.Although extensive tabulations of physical property and thermodynamic data for the fluorocarbon refrigerants have been available for some time, no corresponding tabulation of theoretical performance data were available. Previously, except for a few standard conditions, engineers and scientists had to choose appropriate data for the refrigeration cycle of interest and manually calculate the performance data for each refrigerant under a given set of conditions. To eliminate the need for this type of tedious manual calculation, a general computer program has been prepared which accurately calculates performance data for any given refrigerant assumed to be operating in a fixed refrigeration cycle. Using this general program, the performance data of interest in industrial applications have been calculated for refrigerants 12 and 22.The calculation of performance properties using a digital computer requires a complete translation of physical property data and thermodynaqlic equations for each refrigerant into a general mathematical model which describes and mathematically simulates the conditions found in a refrigeration system. Based on this mathematical representation of the physical system, appropriate equations and thermodynamic expressions for the particular refrigerant are then adapted to a logic flow sequence for the actual calculation of-the performance data. This paper presents the details of the general computer program which was used to calculate the performance data for refrigerants 12 and 22.