摘要
为了筛选出适宜于闪蒸-双工质联合发电系统的循环工质,建立了闪蒸-双工质联合发电系统的热力学模型。在这个计算模型中,采用热水温度范围为100~150℃,热水流量取为36t/h,冷却水进口温度设定为15℃。以单位热水净发电量、热效率、?效率和系统不可逆损失作为联合系统性能的评价指标,研究5种有机工质(R236fa、R600a、R600、R245fa、R601a)的运行参数,比较不同地热流体温度条件下这5种有机工质的做功能力,确立了联合发电系统的最佳循环工质。研究结果表明:联合系统的净发电量随着闪蒸温度的增加呈先增大后减小的趋势,每种工质都有一个最佳的闪蒸温度使得联合系统的单位热水净发电量达到最大;综合考虑这5种工质的环保性能和热力学性能,工质R245fa是综合性能最好的工质,可作为闪蒸-双工质联合发电系统的有机工质。
To select a suitable working fluid for flash-binary power system （FBPS）, a thermodynamic model for FBPS was established. In this calculation, the heat source temperature of the FBPS is 100-150℃ with a flow rate of 36t/h and cooling water inlet temperature is 15℃. Five organic working fluids （R236fa, R600a, R600, R245fa, R601a） were selected to analyze their work capacity based on the performance index of net power output per ton of geofluid, thermal efficiency, exergy efficiency and irreversible loss of the system. Finally, the best working fluid was determined. Results showed that the net power output of FBPS increases with the increase of flash temperature and then decreases. Each working fluid has an optimum flash temperature which makes the net power output to be maximum. Taking environmental and thermodynamic performance into consideration, R245fa is the best working fluid for the flash-binary power system.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2017年第4期1521-1528,共8页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(5140060664)
广东省科技计划(2014A020223001)项目
关键词
闪蒸-双工质联合发电
工质选择
最佳闪蒸温度
热效率
[火用]效率
flash-binary power system
working fluid selection
optimal flash temperature
thermal efficiency
exergy efficiency
作者简介
第一作者:罗珂(1988-),男,硕士研究生,主要从事地热能利用方面的研究。E-mail:luoke@ms.giec.ac.cn;联系人:龚宇烈,博士,研究员,主要从事地热发电和地热综合利用方面的研究。E-mail:gongyl@ms.giec.ac.cn。
