不同太阳能热源下混合工质ORC系统性能分析

doi:10.12096/j.2096-4528.pgt.2018.028

发电技术 ›› 2018, Vol. 39 ›› Issue (2): 177-187.DOI: 10.12096/j.2096-4528.pgt.2018.028

不同太阳能热源下混合工质ORC系统性能分析

顾煜炯(),陈礼敏,耿直()

华北电力大学国家火力发电工程技术研究中心, 北京市昌平区 102206

收稿日期:2017-12-10 出版日期:2018-04-30 发布日期:2018-07-27
作者简介:顾煜炯(1968),男,教授,博士生导师,主要研究方向为电站设备状态维修理论与技术、可再生能源的利用与开发, guyujiong@263.net|陈礼敏(1994),女,硕士研究生,主要研究方向为中低温太阳能热发电有机朗肯循环系统|耿直(1991),男,博士研究生,主要研究方向为太阳能热发电技术、有机朗肯循环及热力系统优化, huadiangengzhi@163.com
基金资助:
北京市自然科学基金(3172031);中央高校基本科研业务费专项资金(2016XS24);中央高校基本科研业务费专项资金(2017MS017)

Performance Analysis of ORC System for Non-Zeotropic Mixtures Under Different Solar Energy Sources

Yujiong GU(),Limin CHEN,Zhi GENG()

National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Changping District, Beijing 102206, China

Received:2017-12-10 Published:2018-04-30 Online:2018-07-27
Supported by:
Beijing Natural Science Foundation(3172031);Fundamental Research Funds for the Central Universities(2016XS24);Fundamental Research Funds for the Central Universities(2017MS017)

摘要/Abstract

摘要：

工质性质是影响有机朗肯循环(organic Rankine cycle，ORC)系统性能的重要因素之一。在不同热源温度下，对采用R601、R245fa作为组分的9种不同质量配比工质的ORC系统热力性和经济性进行计算，然后采用灰色关联法对系统性能进行分析及综合评价，并与纯工质的性能进行对比。研究表明，混合工质系统的热力学指标与温度滑移大小近似成反比。当温度滑移大于5K时，纯工质性能更优，且经济性也优于混合工质系统。综合来看，热源温度一定时，灰色关联度随着蒸发温度的升高呈现先增大后减小的趋势；混合工质R601/R245fa(0.1/0.9)的温度滑移最小，其性能也最优。采用R601和R245fa混合作为工质的系统在热源温度为160℃时，灰色关联度最大，系统性能更优。

关键词: 太阳能, 非共沸混合工质, 有机朗肯循环(ORC), 灰色关联度, 热源温度

Abstract:

The characteristic of working fluids is one of the important factors that affect organic Rankine cycle (ORC) system.Under the different heat source temperature, 11 substances were adopted as the subcritical ORC working fluids, R245fa and R601, as well as 9 non-zeotropic binary mixtures in different mass ratios.The thermal and economic model of the ORC had carried on the analysis.Finally, the method of grey correlation was used to evaluate the system performance.The study shows that the thermodynamic indexes of non-zeotropic binary mixtures are approximately inverse proportional to the temperature glides.When the temperature slip is greater than 5℃, the pure industrial performance is better.The system using the non-zeotropic mixtures is less economical than the pure working fluids.Incombination, when the heat source temperature is fixed, the grey correlation grade increases first and then decreases with the increase of evaporation temperature.The temperature glide of R601/R245fa(0.1/0.9) is the best and its performance is optimal.Using mixed R601 and R245fa as working fluid, system performance is best when the heat source temperature is 160℃.

Key words: solar energy, non-zeotropic mixtures, organic Rankine cycle (ORC), grey correlation grade, heat source temperature

顾煜炯,陈礼敏,耿直. 不同太阳能热源下混合工质ORC系统性能分析[J]. 发电技术, 2018, 39(2): 177-187.

Yujiong GU,Limin CHEN,Zhi GENG. Performance Analysis of ORC System for Non-Zeotropic Mixtures Under Different Solar Energy Sources[J]. Power Generation Technology, 2018, 39(2): 177-187.

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不同太阳能热源下混合工质ORC系统性能分析

Performance Analysis of ORC System for Non-Zeotropic Mixtures Under Different Solar Energy Sources

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