采用涡旋式膨胀机的有机朗肯循环系统试验研究

摘要

通过搭建采用涡旋式膨胀机的小型有机朗肯循环(ORC)系统,并使用R134a、R245fa、R22和R324种不同循环工质,测试了ORC系统的整体性能以及涡旋式膨胀机特性.试验采用的热源温度为70 ～ 110℃,冷源温度为28.5±1℃.试验结果中,系统最高运行效率为6.75％,涡旋式膨胀机进出口的压差相对稳定,为261.2～608.8 kPa,绝热效率为79.30％～ 99.19％,而工质实际流量仅为理论流量的23.5％～ 50.6％.%The experimental study of a small - sized organic rankine cycle ( ORC) system using scroll expander as the expanding mechanism were presented, under the condition of the heat source temperature of 70 ~ 110 °C and heat sink temperature of 28.5 ± It. The organic working fluid of this ORC system were R134a,R245fa,R22 and R32. The result show: the highest efficiency of this ORC system was 6. 75% ; the pressure difference between inlet and outlet of scroll expander was 261. 2 ~ 608. 8 kPa, and kept relatively steady under different working conditions; adiabatic efficiency of scroll expander was 79. 30% ~ 99. 19% ;the actual flow rate of working fluid was 23. 5% ~50. 6% of the theoretical flow rate.