通过理论分析，分析了换热器对集热器效率的影响，确定了换热器对集热器的削弱因子。
We analyzed the effect on the collector efficiency of using a heat exchanger and determined a "heat exchanger penal factor".
推导出了四种结构的热迁移因子、效率因子和时间常数等表达式，搭建了槽式太阳能集热器系统，进行了试验测试和验证。
Expressions of heat removal factor, efficient factor and time constant of the four types of cavity receiver have been deduced and test for trough solar collector system has been set up.
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