摘要
文章构建了复叠式非共沸工质有机朗肯循环系统模型,并利用该模型对复叠式非共沸工质有机朗肯循环系统的热力学性能进行分析,得到了高温级循环质量流量、低温级循环质量流量、冷却水质量流量、高温级循环净输出功率、低温级循环净输出功率、冷却水泵功耗和系统净输出功率等随工质摩尔组分的变化规律。分析结果表明,高温级循环蒸发泡点温度和高温级蒸发器夹点位置会影响复叠式非共沸工质有机朗肯循环各项性能参数随工质摩尔组分的变化趋势,当高温级循环混合物中环戊烷的摩尔组分为0.8,低温级循环混合物中异丁烷摩尔的组分为0.1时,复叠式非共沸工质有机朗肯循环系统的净输出功率达到最大值,为92.79 kW,比复叠式纯工质有机朗肯循环系统提高了3.83%。
System model of the cascade zeotropic working fluid organic Rankine cycle(ORC) is established. Thermodynamic performance of the system is analyzed by using the model. The effects of working fluids mole fractions on high-temperature cycle mass flow rate, low-temperature cycle mass flow rate, cooling water mass flow rate, high-temperature cycle net power output, low-temperature cycle net power output, cooling water pump power consumption, and system net power output is investigated. The results show that the high-temperature cycle evaporation bubble point temperature and high-temperature cycle evaporator pinch point positions will affect the variation trend of cascade zeotropic working fluid ORC performance parameters with high-temperature cycle working fluid mole fraction;When mole fractions of cyclopentane are 0.8 and isobutane is 0.1 respectively, the cascade zeotropic working fluids ORC system net power output has the maximal value 92.79 kW, which is 3.83% higher than that of the cascade pure working fluids ORC system.
作者
解志勇
段远源
葛众
李健
Xie Zhiyong;Duan Yuanyuan;Ge Zhong;Li Jian(Yunnan University,School of Architecture and Urban Planning,Kunming 650091,China;Tsinghua University,Department of Energy And Power Engineering,Beijing 100084,China)
出处
《可再生能源》
CAS
北大核心
2019年第5期776-783,共8页
Renewable Energy Resources
基金
国家自然科学基金(51736005
11461078)
关键词
有机朗肯循环
复叠式循环
非共沸工质
热性能分析
organic Rankine cycle
cascade cycle
zeotropic working fluid
thermal performance analysis
作者简介
解志勇(1964-),男,高级工程师,研究方向为建筑能源及能源高效利用。E-mail: 279235496@qq.com.
