中低温地热发电有机朗肯循环系统性能的实验研究

EXPERIMENTAL STUDY OF PERFORMANCE OF ORGANIC RANKINE CYCLE SYSTEM FOR LOW /MODERATE TEMPERATURE GEOTHERMAL POWER GENERATION

以中低温地热资源的高效和经济利用为背景,在以涡旋膨胀机为膨胀部件的有机朗肯循环实验系统上,以R245fa为工质,在热源水进口温度、冷凝压力保持一定的条件下,实验考查有机朗肯循环系统性能随工质蒸发压力和膨胀机转速的变化规律。结果表明,工质蒸发压力和膨胀机转速取值均对系统性能有重要影响,分别存在最优蒸发压力和最优膨胀机转速。

With a view of efficiently and economically utilizing the low/moderate temperature geothermal sources, the varying principle of performance of an Organic Rankine Cycle （ORC） system was carried out with the value selections of the evaporation pressure of working fluid and the rotating speed of the expander in the Organic Rankine Cycle （ORC） system with scroll expander, R245fa as the working fluid, fixing hot water inlet temperature and condensing pressures. The results show that the evaporation pressure of working fluid and rotating speed of the scroll expander possess important effects on the performance of experiment system, there are optimal evaporation pressure of working fluid and optimal rotating speed of the scroll expander to make the performance of the system optimum, respectively.