有机朗肯循环膨胀机入口过热度实验

doi:10.16085/j.issn.1000-6613.2016.07.011

化工进展 ›› 2016, Vol. 35 ›› Issue (07): 2007-2014.DOI: 10.16085/j.issn.1000-6613.2016.07.011

有机朗肯循环膨胀机入口过热度实验

杨绪飞, 戚风亮, 刘秀龙, 邹景煌, 徐进良

华北电力大学低品位能源多相流与传热北京市重点实验室, 北京 102206

收稿日期:2015-11-24 修回日期:2015-12-22 出版日期:2016-07-05 发布日期:2016-07-05
通讯作者: 徐进良,教授,博士生导师,研究方向为多相流传热和低品位热源利用技术研究。E-mail:xjl@ncepu.edu.cn。
作者简介:杨绪飞(1986-),男,博士研究生,主要研究低品位热源利用技术。E-mail:yxf@ncepu.edu.cn。
基金资助:
国家自然科学基金重大国际合作项目(51210011)。

Experiment on expander inlet superheat of organic Rankine cycle

YANG Xufei, QI Fengliang, LIU Xiulong, ZOU Jinghuang, XU Jinliang

Beijing Key Laboratory of Multiphase Flow and Heat Transfer for Low Grade Energy, North China Electric Power University, Beijing 102206, China

Received:2015-11-24 Revised:2015-12-22 Online:2016-07-05 Published:2016-07-05

摘要/Abstract

摘要： 在给定热源条件下,探讨有机朗肯循环(ORC)膨胀机入口过热度对膨胀机性能和ORC系统性能的影响。建立了带前置泵的ORC实验系统,采用涡旋式膨胀机,R123为工质,在140℃热源下进行实验。通过改变膨胀机转矩调节系统蒸发压力,从而实现对膨胀机入口过热度的调节。实验获得最大膨胀机轴功和膨胀机实际运行效率分别为2.35kW和59.7%;ORC系统净输出功、热效率和(火用)效率分别为1.75kW、5.3%和21.8%。分析表明,随着膨胀机入口过热度递减,膨胀机机械效率递增,膨胀机等熵效率递减,膨胀机轴功和实际运行效率呈先增后减的变化趋势。膨胀机入口过热度为20℃左右时,有最大膨胀机轴功、最大系统净输出功、最高系统热效率和最高系统(火用)效率。此外,过热度影响系统的损失分布,随着膨胀机入口过热度减小,膨胀机(火用)损呈先增后减变化。

关键词: 有机朗肯循环, 过热度, 热效率, (火用)效率, (火用)损

Abstract: This article discusses the effect of expander inlet superheat on the performance of expander and the organic Rankine cycle (ORC) system at fixed heat source. An ORC experimental rig was constructed with scroll expander, and dichlorotrifluoroethane (R123) was selected as the working fluid. At 140℃, experiments were carried out by adjusting the expander torque to control the system evaporation pressure, to regulate the expander inlet superheat. Experimental results showed that the maximum shaft power and actual operating efficiency of the expander were 2.35 kW and 59.7 %, respectively. The maximum net output power, thermal efficiency and exergy efficiency of the ORC system were 1.75 kW, 5.3 % and 21.8 %, respectively. Analysis showed that with the expander inlet superheat decreased, the expander mechanical efficiency increased while the expander isentropic efficiency decreased. As the superheat decreased, the shaft power and actual operating efficiency of the expander first increased, then decreased. When the expander inlet superheat was about 20℃, the expander showed the maximum output power, and the ORC system provided the highest net output power, thermal efficiency and exergy efficiency, simultaneously. Besides, expander inlet superheat influenced the exergy destruction distribution of the ORC system. With the expander inlet superheat decreased, the expander exergy destruction first increased and then decreased.

Key words: organic Rankine cycle, superheat, thermal efficiency, exergy efficiency, exergy destruction

中图分类号:

TK114

杨绪飞, 戚风亮, 刘秀龙, 邹景煌, 徐进良. 有机朗肯循环膨胀机入口过热度实验[J]. 化工进展, 2016, 35(07): 2007-2014.

YANG Xufei, QI Fengliang, LIU Xiulong, ZOU Jinghuang, XU Jinliang . Experiment on expander inlet superheat of organic Rankine cycle[J]. Chemical Industry and Engineering Progree, 2016, 35(07): 2007-2014.

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有机朗肯循环膨胀机入口过热度实验

Experiment on expander inlet superheat of organic Rankine cycle

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