基于有机朗肯循环的低温余热发电系统设计与分析

Design and Analysis on Low-temperature Waste Heat Power Generation Using Organic Rankine Cycle

设计了基于有机朗肯循环的低温余热发电系统,并对其进行详细的分析与研究。实验主要采用涡旋膨胀机与永磁同步发电机,工质采用R600a,实验分析了整个系统的运行特性和有机朗肯循环的性能,研究了永磁同步发电机转速、热源温度、工质泵频率对系统电能、质量流量、热电转换效率的影响,分析了影响有机朗肯循环系统的主要因素。通过数据分析得出低温余热发电系统的热机转换效率为7.2%、最大输出电能为440 W、发电机的最佳转速为2 150 r/min。

Detailed analysis and research on the low-temperature waste heat power generation were based on the organic rankine cycle（ORC）. The experiment mainly selected scroll expander, permanent magnet synchronous generator（PMSG） and R600a. The experiment analysised the operation of the whole ORC system. The impact of the PMSG speed, waste heat temperature and refrigerant pump frequency on the output power, mass flow rate, thermo-electric conversion efficiency were studied. The thermo-electric conversion efficiency is 7.2 %, the max output power is 440W and the best PMSG speed is 2 150 r/rain.