换热器系统的热力学性能评价

引入可用能损率这一指标对串联组合的换热器系统的热力学性能进行了 分析和评价，得到了换热器系统可用能损率的一般计算式，讨论了换热器系统的总流动趋势、冷热流体热容量流率比、传热单元数及单台换热器的流型、传热有效度和数目等对换热器系统可用能损率的影响。

Thermodynamic Performance Evaluation of a Heat Exchanger System

With the introduction of an index of available energy destruction rate a thermodynamic performance analysis and evaluation is conducted of a system of heat exchangers connected in series. A general calculation formula for the available energy destruction rate was obtained. In addition, also discussed is the effect on the available energy destruction rate of a whole variety of factors. They include: the general flow tendency of the heat exchanger system, cold and hot fluid heat capacity flow rate ratio, the number of heat transfer units and the flow pattern of a single heat exchanger, heat transfer effectiveness, and the number of connected heat exchangers, etc.