低温余热驱动的热电复合系统优化设计  

Optimization Design of a Combined Organic Rankine Cycle-Heat Pump System Driven by Low-Grade Waste Heat

作　　者：钟芬[1] 吴竺[1] 朱彤[1] 高乃平[1] 

机构地区：[1]同济大学机械与能源工程学院,上海市嘉定区201804

出　　处：《中国电机工程学报》2016年第12期3176-3183,共8页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2014CB 249201)~~

摘　　要：基于热力学定律,对低温余热驱动的有机朗肯循环(ORC)与热泵循环(HPC)组成的复合系统进行了分析计算,并对不同状态参数对系统性能的影响进行了讨论及优化设计。研究表明:在余热资源温度为368.15K、流量为1kg/s的标准运行工况条件下,系统的高品位产热量为27.56k W,能量利用率为10.13%,此时系统最佳的ORC蒸发温度为335.15K使得系统的能量利用率最高,高温产热量最大;而ORC系统冷凝温度的提高将降低系统的高温产热量;同时研究发现:膨胀机等熵效率的提升对复合系统产热量的增加有较明显的作用。The system combined organic Rankine cycle（ORC） with heat pump cycle（HPC） was analyzed based on the 1st law of classical thermodynamics. Meanwhile the parametric trade-off was discussed to predict the performance for the combined system. It is found that under the typical waste heat conditions of the inlet temperature is 368.15 K and mass flow rate is 1kg/s, the heat capacity of 27.56 k W for the combined system will be obtained. And there is an optimal ORC-evaporation temperature for the maximum heating output, and the decrease of ORC-condensation temperature contribute to a reduction of heating output. In addition, the results show that the isentropic efficiency of turbine has a great impact on the heat capacity of the combined system.

关 键 词：分布式能源 有机朗肯循环(ORC) 热泵循环(HPC) 低温余热 产热量 能量利用率 R134A R245FA 

分 类 号：TK01[动力工程及工程热物理]