高级空调系统和高级空调系统的理想启动压力和制冷系统。传统上，这些计算都是手工进行的，这并不是因为它们简单，而是因为很难对制冷剂的物理特性进行编程。制冷剂性能算法在文献中已有15年的历史，但其格式与性能表相同。这个程序使用这些“精确”属性算法作为基础，根据这些算法定义给定任何一对已知属性（P、T、v、h、s、x）的热力学状态。这个程序是用BASIC编写的，可以用它目前的交互形式来代替属性表，也可以很容易地修改为在系统模型中使用，因此它适用于暖通空调技术选修课以及热力学入门课程。 单位:I-PCITION:研讨会，ASHRAE交易，1987年，第93卷，pt。1，纽约州纽约市

Senior level HVAC classes typically cover basic air-conditioning and refrigeration systems, starting with a simple ideal vapor compression cycle and possibly later accounting for coil pressure drops and compressor characteristics. These calculations have traditionally been performed by hand, not because of their simplicity, but largely because of the difficulty in programming the physical properties of the refrigerant. Refrigerant property algorithms have been available in the literature for over 15 years but in a format identical to that found tables of properties. This program uses those "exact" property algorithms as a basis for which to define a thermodynamic state given any pair of known properties (P, T, v, h, s, x). This program, written in BASIC, can be used in its present interactive form to replace tables of properties or can be easily modified to use in system modelso It is appropriate for use in HVAC technical elective courses as well as in introductory thermodynamics courses.Units: I-P