摘要
采用有机介质R152a，建立有机朗肯循环发电机组，并进行螺杆机和发电机之间两种传动比（4：3和2：1）中试实验。在实验基础上，以最大发电功率为目的对系统进行仿真计算。结果表明：试制的螺杆膨胀机等熵效率为55％-57％；机组膨胀功的基础功耗主要由转动部件摩擦和膨胀机泄漏造成的，转动部件的摩擦功耗随着机组传动比增加而升高；仿真模拟发电功率与实验结果偏差基本在2％以内；当热源温度为60℃时，模拟结果显示螺杆膨胀机和发电机的传动比为1．76时，机组的发电功率最大。
A power generation system with low temperature heat source was built, using R152a as working fluid on the basis of the theory of organic Rankine cycle （ORC）. The pilot experiments of transmission ratio between screw expander and generator of 4 ： 3 and 2： 1 were carried out, respectively. The simulation calculation was performed to get maximum power output. The results show that the isentropic efficiency of screw expander is about 55%-57%. The power consumption of expansion work is mainly composed of friction caused by rotational parts and expander leaking, the friction power consumption of rotating components increases with transmission ratio rising; the basic deviation between simulation result and experimental result is within 2%. When the heat source temperature is 60 ℃, the simulation results show that the best drive ratio of screw expander and generator is 1.76, the generation system has the maximum power output.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2015年第10期2411-2416,共6页
Acta Energiae Solaris Sinica
基金
国家重点基础研究发展(973)计划(2009CB219907)
