机械工程学报 >

2018 , Vol. 54 >Issue 18: 180 - 186

DOI: https://doi.org/10.3901/JME.2018.18.180

可再生能源与工程热物理

冷却水耗功对有机朗肯循环影响的热力学分析

  • 朱轶林 ,
  • 李惟毅 ,
  • 孙冠中
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  • 1. 天津大学中低温热能高效利用教育部重点实验室 天津 300350;
    2. 中国电力科学研究院 北京 100192
朱轶林,男,1989年出生,博士研究生。主要研究方向为中低温余热发电、能源与环境工程。E-mail:zhuyilin@tju.edu.cn

收稿日期: 2017-05-12

  修回日期: 2017-11-10

  网络出版日期: 2018-09-20

基金资助

国家自然科学基金（51507093）和天津市科技计划（14ZCDGGX00788）资助项目。

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Thermodynamic Analysis of an Organic Rankine Cycle with Cooling Water Power Consumption Considered

  • ZHU Yilin ,
  • LI Weiyi ,
  • SUN Guanzhong
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  • 1. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy of Ministry of Education, Tianjin University, Tianjin 300350;
    2. China Electric Power Research Institute, Beijing 100192

Received date: 2017-05-12

  Revised date: 2017-11-10

  Online published: 2018-09-20

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摘要

由于有机朗肯循环的热效率相对较低，冷凝过程放热量大，冷却水耗功对系统性能的影响较大。研究中考虑冷却水循环，定义水泵耗功比为冷却水耗功与循环功的比值，对有机朗肯循环的系统性能进行热力学分析，研究了冷却水耗功模型中重要参数的影响规律。研究结果表明：提高蒸发温度，水泵耗功比下降；提高冷凝温度，水泵耗功比增大。环境温度为20℃和冷却水初温为25℃时，冷凝器有最小的不可逆损失19.03 kW，系统有最小的不可逆损失为140.32 kW。冷却水温升对水泵耗功比的影响显著，冷却水温升减小，水泵耗功比非线性下降；提高水泵扬程，水泵耗功比线性增大。冷却水温升小于8 K或水泵扬程大于15 m，水泵耗功比大于5%，冷却水耗功对系统净输出功的影响不能忽略。

关键词： 余热回收; 有机朗肯循环; 冷却水循环; ?分析; 净输出功

本文引用格式

朱轶林 , 李惟毅 , 孙冠中 . 冷却水耗功对有机朗肯循环影响的热力学分析[J]. 机械工程学报, 2018 , 54(18) : 180 -186 . DOI: 10.3901/JME.2018.18.180

Abstract

The thermal efficiency of organic Rankine cycle (ORC) is usually low because of the abundant rejection heat rate in the condensation process. Besides, the cooling water power consumption influences the system performance significantly. Considering the cooling water circulation, the ratio for cooling water power consumption is defined as the value of water pump power consumption per power output of the loop, and the effects of important factors have been investigated. The results show that the ratio for cooling water power consumption declines with increasing evaporation temperature, whereas it rises with increasing condensation temperature. With the ambient temperature of 20℃ and the initial temperature for cooling water of 25℃, the expander has the minimum irreversible loss of 19.03 kW and the system has the minimum irreversible loss of 140.32 kW. The influence of temperature rise for cooling water on the ratio for cooling water power consumption is significant. It has a nonlinear fall with decreasing the temperature rise of cooling water, and increases linearly with increasing water pump head. When the temperature rise for cooling water is less than 8 K or the water pump head is more than 15 m, the ratio for cooling water power consumption is larger than 5%, which manifests that the cooling water power consumption cannot be neglected for the ORC system.

Key words： waste heat recovery; organic Rankine cycle (ORC); circulating cooling water; exergy analysis; net power output

参考文献

[1] YANG M,YEH R H. Thermo-economic optimization of an organic Rankine cycle system for large marine diesel engine waste heat recovery[J]. Energy,2015,82:256-268.
[2] 谭雨亭,赵力,鲍军江,等. 有机朗肯循环太阳能热发电辅助燃煤电厂CO2 捕集系统技术经济性分析[J]. 机械工程学报,2014,50(20):151-156. TAN Yuting,ZHAO Li,BAO Junjiang,et al. Technoeconomic study of carbon capture from coal-fired powerplant using MEA assisted by solar organic Rankine cycle for power generation[J]. Journal of Mechanical Engineering,2014,50(20):151-156.
[3] JIANG L,WANG L,WANG R,et al. Investigation on cascading cogeneration system of ORC (Organic Rankine Cycle) and CaCl2/BaCl2,two-stage adsorption freezer[J]. Energy,2014,71(12):377-387.
[4] SHU G,GAO Y,TIAN H,et al. Study of mixtures based on hydrocarbons used in ORC (Organic Rankine Cycle) for engine waste heat recovery[J]. Energy,2014,74(5):428-438.
[5] 张红光,王宏进,杨凯,等. 基于双有机朗肯循环的柴油机余热回收系统性能分析[J]. 北京工业大学学报,2015(8):1240-1246. ZHANG Hongguang,WANG Hongjin,YANG Kai,et al. Performance analysis of waste heat recovery with a dual loop organic Rankine cycle system for diesel engine[J]. Journal of Beijing University of Technology,2015(8):1240-1246.
[6] SONG J,LI Y,GU C,et al. Thermodynamic analysis and performance optimization of an ORC (Organic Rankine Cycle) system for multi-strand waste heat sources in petroleum refining industry[J]. Energy,2014,71(21):673-680.
[7] 方金莉,魏名山,王瑞君,等. 采用中温有机朗肯循环回收重型柴油机排气余热的模拟[J]. 内燃机学报,2010,28(4):362-367. FANG Jinli,WEI Mingshan,WANG Ruijun,et al. Simulation of waste heat recovery from a heavy-duty diesel engine with a medium temperature ORC system[J]. Transactions of CSICE,2010,28(4):362-367.
[8] 杨凯,张红光,宋松松,等. 变工况下车用柴油机排气余热有机朗肯循环回收系统[J]. 化工学报,2015,66(3):1097-1103. YANG Kai,ZHANG Hongguang,SONG Songsong,et al. Waste heat organic Rankine cycle of vehicle diesel engine under variable working conditions[J]. CIECS Journal,2015,66(3):1097-1103.
[9] SONG J,SONG Y,GU C. Thermodynamic analysis and performance optimization of an Organic Rankine Cycle (ORC) waste heat recovery system for marine diesel engines[J]. Energy,2015,82:976-985.
[10] 刘杰,陈江平,祁照岗. 低温有机朗肯循环的热力学分析[J]. 化工学报,2010,61(s2):9-14. LIU Jie,CHEN Jiangping,QI Zhaogang. Thermodynamic analysis of low temperature organic Rankine cycle[J]. CIECS Journal,2010,61(s2):9-14.
[11] 谈西锋,李惟毅,史维秀. 非共沸混合工质用于螺杆膨胀机双循环低温余热回收系统的理论研究[J]. 机械工程学报,2012,48(6):136-141. TAN Xifeng,LI Weiyi,SHI Weixiu. Analysis of zeotropic mixtures used in double circulatio low-temperature waste heat recovery system with screw expander[J]. Journal of Mechanical Engineering,2012,48(6):136-141.
[12] 杨新乐,黄菲菲,李惟慷,等. 考虑换热温差的新型有机朗肯循环-分流闪蒸系统热力性能分析[J]. 机械工程学报,2015,51(8):151-157. YANG Xinle, HUANG Feifei, LI Weikang,et al. Thermal performance analysis on the new organic Rankine cycle-bypass flash system considering the temperature difference of heat exchanger[J]. Journal of Mechanical Engineering,2015,51(8):151-157.
[13] YANG F,ZHANG H,BEI C,et al. Parametric optimization and performance analysis of ORC (organic Rankine cycle) for diesel engine waste heat recovery with a fin-and-tube evaporator[J]. Energy,2015,91:128-141.
[14] 陈奇成,徐进良,苗政.中温热源驱动有机朗肯循环工质研究[J].中国电机工程学报,2013,33(32):1-7. CHEN Qicheng,XU Jinliang,Miao ZHENG.Working fluid selection for medium temperature organic Rankine cycle[J]. Proceedings of the CSEE,2013,33(32):1-7.
[15] 魏名山,方金莉,王瑞君,等. 柴油机工况对中温有机朗肯循环性能影响的模拟[J]. 内燃机学报,2011,29(3):248-252. WEI Mingshan,FANG Jinli,WANG Ruijun,et al. Simulation of diesel engine conditions on a medium temperature ORC system[J]. Transactions of CSICE,2011,29(3):248-252.
[16] YANG F,ZHANG H,SONG S,et al. Thermoeconomic multi-objective optimization of an organic Rankine cycle for exhaust waste heat recovery of a diesel engine[J]. Energy,2015,93:2208-2228.
[17] 杨富斌,董小瑞,王震,等. 基于有机朗肯循环的车用柴油机排气余热回收系统性能分析[J]. 车用发动机,2015,1:33-38. YANG Fubin,DONG Xiaorui,WANG Zhen,et al. Performance analysis for waste heat recovery system of vehicle diesel engine based on organic Rankine cycle[J]. Vehicle Engine,2015,1:33-38.
[18] SIDDIQI M A,ATAKAN B. Alkanes as fluids in Rankine cycles in comparison to water,benzene and toluene[J]. Energy,2012,45:256-263.
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