摘要
为了解槽式太阳能热发电系统中各热力设备的热力完善性及过程的不可逆程度,本文以热力学第一及第二定律为基础,建立了槽式太阳能双工质回路热发电系统集热器子系统、透平发电子系统及凝汽器子系统的热平衡和平衡数学模型,并结合SEGS-VI的设计参数,计算得到了系统各部分热效率与效率,从而揭示了系统的损分布及其大小。结果表明:整个系统的热损失率为78.36%,其中热损最多的部位是凝汽器,占总辐射能的33.33%;整个系统的损失率为77.2%,其中集热场的损最多,占总太阳辐射火用的67.16%。此分析结果将为槽式热发电系统的改进以及效率的进一步提高提供依据。
The aim is to determine the thermodynamic integrity and irreversibility at all equipments in a solar thermal power generation system.Based on the first and second thermodynamic law,the exergy and thermal conservative equations of collector,turbine power generation and condenser subsystem of a trough solar thermal power generation using two medium circuit system are established.Combined with SEGS-VI design parameters,the thermal and exergy efficiency in each part of subsystems is calculated,and the distribution and value of exergy loss is revealed.The results show that the heat loss rate in the whole system is 78.36%.The largest heat loss occurs in the condenser and it equals 33.33% of the whole energy.Besides,the exergy loss of system is 77.2%.The largest exergy loss occurs in collector field and it equals 67.16% of total solar radiant exergy.The results can make contribution for the improvement of the trough solar thermal power generation.
出处
《现代电力》
北大核心
2012年第6期74-78,共5页
Modern Electric Power
基金
国家苏州工业园区科技发展资金资助项目(ZXG201035)
国家自然科学基金项目(51206049)
国家863项目(2012AA050604)
中央高校基本科研业务费专项资金(11MG07)
关键词
槽式太阳能
热效率
热损
效率
损
trough solar
thermal efficiency
heat loss
exergy efficiency
exergy loss
