中文摘要：

本文研究了变面积槽式太阳能卡琳娜循环的热力性能,用以解决低辐照无法利用以及变辐照条件下卡琳娜循环变工况运行的问题。新系统主要包括两部分：可变镜面积抛物槽式太阳能集热器和可变流程卡琳娜循环。随太阳辐照强度减小,集热温度不变,透平入口温度不变,通过改变扩展聚光镜有效集热面积,维持集热量不变,减少变工况运行;当扩展聚光镜已经全部展开至主聚光镜两侧,而太阳辐照强度继续减小,需降低集热温度和传热介质进出口温差,降低透平入口温度,调整卡琳娜循环流程和主要参数。结果表明,新系统能够增大可利用的太阳辐照强度范围,维持集热场有效热能不变,减少系统变工况运行。

英文摘要：

This paper investigated the performance of Kalina cycle with variable mirror area parabolic trough collector, in order to solve the problem that low solar irradiance cannot be exploited and power block operates at off-design conditions with the variation of solar irradiation. As solar irradiation decreases, the working temperature is kept constant as well as the turbine inlet temperature and the concentrated solar heat is kept constant by extending the mirror area. When the extendable mirror is totally unfolded, but solar irradiation still decreases, the working temperature and inletoutlet temperature difference of heat transfer medium should be lowered. Correspondingly, the turbine inlet temperature should be decreased and the configuration of Kalina cycle should be adjusted. Results show that new system can enlarge the range of solar irradiance that can be utilized and reduce the off-design operation of power subsystem.