双级耦合热泵供暖系统换热面积优化
Optimization of heat exchanger area for doublestage coupling heat pump heating systems
摘要：
应用有限时间热力学理论对双级耦合热泵供暖系统换热器面积进行优化，得到了系统供热系数最优时的最佳传热面积分配，最佳工质工作温度、最小总传热面积以及最小输入功率的解析式。结合实际算例，分析了换热器总传热面积对系统特性的影响以及不同设计工况下的优化结果，同时讨论了换热器种类对最小总传热面积的影响。
关键词：双级耦合热泵,有限时间热力学,换热器面积,优化
Abstract：
Performs the optimization with finite time thermodynamic analysis and obtains the allocation of heat exchanger area for doublestage coupling heat pump systems that maximize the objective function, and the analytical expressions about the optimal temperature of working fluids, the minimum total heat exchanger area and the minimum power input. With an example, analyses the effect of total heat exchanger area on system performance and the optimizing results under different conditions and discusses the impact of exchanger type on the minimum exchanger area.
Keywords:doublestagecouplingheatpump,finitetimethermodynamics,heatexchangerarea,optimization