有机朗肯循环发电系统设计及实验研究

Design and Experiment Research on Organic Rankine Cycle (ORC) Power Generation System

本文以90~150℃低温余热热源的回收利用为前提,搭建了有机朗肯循环(ORC)发电系统实验平台。通过调节透平膨胀机入口压力,改变蒸发温度,实验研究蒸发温度对膨胀机性能和系统性能的影响。结果表明:当蒸发温度从76℃升高到84℃时,膨胀机入口温度逐渐升高,使膨胀机转速增大约9.11%,膨胀机输出功率增大1.26 kW,最高等熵效率为80.6%;系统循环净功、热效率、不可逆损失及效率均随蒸发温度的升高呈增大趋势,分别增大了33.9%、26.7%、15.4%、27%。

Based on the premise of recycling the low-temperature waste heat from a90-150source,a test bench was designed for an organic Rankine cycle power generation system,and experimental research was performed.The effects of the evaporating temperature on the expander performance and system performance were investigated by adjusting the inlet pressure of the turbo expander and the evaporation temperature.The experimental results showed that when the evaporation temperature increased from76to84,the expander inlet temperature gradually increased.Thus,the expander speed increased by approximately9.11%,the output power increased by1.26kW,and the highest isentropic efficiency was80.6%.At the same time,the cycle net power,thermal efficiency,irreversible loss,and exergy efficiency increased with the evaporation temperature by33.9%,26.7%,15.4%,and27%,respectively.