双级耦合热泵供暖系统有限时间热力学性能优化  

Finite Time Thermodynamic Optimization of the Double-stage Coupled Heat Pumps Heating System Performance

作　　者：王伟[1] 马最良 

机构地区：[1]北京工业大学建筑工程学院,北京100022 [2]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《应用基础与工程科学学报》2007年第2期235-243,共9页Journal of Basic Science and Engineering

基　　金：国家自然科学基金资助项目(50278021);北京工业大学青年科学基金项目(97004016200601);中国博士后基金资助项目(98004016200701)

摘　　要：利用有限时间热力学分析理论,对新型双级耦合热泵供暖系统建立了存在热阻、热漏、内不可逆损失的恒温定常流热力学循环模型,得到系统供热性能最优结果下,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.结合实际算例的计算结果,详细分析了各不可逆因素对系统性能的影响.所得结论为新系统在实际推广过程中的设计、运行提供了一定理论依据.Finite time thermodynamic optimization theory was applied to optimize the performance of the double-stage coupled heat pumps heating system （DSCHP）. The irreversible steady flow model of the DSCHP system was founded considering heat resistance, heat leak and internal irreversibility. The optimal allocation of heat exchanger area for DSCHP that maximized the objective function （Coefficient of performance） was investigated. The optimal temperatures of the working fluids, the minimum total heat exchanger area and the minimum power input were determined in terms of the analytical expressions. The effects of the three irreversible factors on the system optimal performance were discussed by calculating some practical cases. The optimization results could guide the design and operation process for the DSCHP system.

关 键 词：双级热泵 热力学分析 性能优化 

分 类 号：TK1[动力工程及工程热物理—热能工程]