available heat meaning in English

可用热量
有效热量
有用热

Based on the comparative analysis of two available heat system plan , the paper selects the water - water heat pump system plan . after a series of character analysis , design calculation ; the style of compressor including media choosing and its circle dynamic calculation for the thermodynamic system is determined . besides this , based on some basic measure of thermodynamic analysis , the heat pump coefficient of performance is discussed ; the exergy analysis for the water - water heat plan is conducted ; the calculation formula of heat pump exergy efficiency is derived ; an optimal model for heat pump together with thermal machine is established and the main exchanger equipment in heat pump system including its resistance calculation is designed in details
本文通过对两种系统方案进行比较分析，确定了水环热泵系统的基本方案，经过定性分析和设计计算，进行了压缩机的选型、工质的选择、热力系统的循环计算等基本设计，同时应用热力学分析的一些基本方法，讨论了如何评价热泵系统的性能系数，并对电厂循环水余热回收热泵系统进行了(火用)分析，得到了热泵过程(火用)效率的计算公式，建立了热泵?热机联合机组优化模型，还对热泵系统的主要换热设备进行了详细的结构设计和阻力计算，最后对热泵系统进行了技术经济分析和评价。