标题：
Design and Experimental Study of a 5-kW Organic Rankine Cycle with Axial-Flow Turbine for Low-Temperature Heat Recovery
点击次数：
所属单位：
能源与动力学院
发表刊物：
JOURNAL OF ENERGY ENGINEERING
关键字：
Axial-flow turbine Low-grade heat source Organic Rankine cycle Power generation
摘要：
The microscale organic Rankine cycle (ORC) system is considered a promising technology to recover thermal energy from widely distributed low-temperature heat sources. By using HFC-R225fa as working fluid, a 5-kW low-temperature ORC system with a hermetic axial-flow turbo generator was designed, and performance of the ORC system was analyzed based on the experimental data. During the design period, the actual electric power output of the ORC system was 2.5 kW, and the internal efficiency of the axial turbine was 23.6%. However, it was found that at the turbine rotational speed of 16,000 rotation per minute (rpm), such aforementioned performances are reduced to approximately half of the design values. Hence, the disagreement between the design value and experimental data implies that the conventional axial turbine design model is inaccurate at low turbine rotational speeds, and the thermal energy grade is decreased in the generator coil cooling process of the microscale integrated turbo generator structure. The experimental results also showed that the axial turbine performance is improved at high turbine rotational speed for the microscale ORC system. Finally, a suitable turbine rotational speed is recommended in this research. (C) 2018 American Society of Civil Engineers.
ISSN号：
0733-9402
是否译文：
否
发表时间：
2018-06-01
合写作者：
韩东,蒲文灏
通讯作者：
岳晨
发表时间：
2018-06-01
学位：工学博士学位
职称：副教授
所在单位：能源与动力学院