In this paper, based on the existed model, a heat transfer model was created by choosing some experimental correlations all over again. The computing results demonstrate that the new model is superior to the existed one. Then the new model was used to calculate the efficiency and the outlet temperature of parabolic trough solar receiver heat-transfer fluid with different solar irradiation, flow rate and heat-transfer fluid inlet temperature. Through the analysis and collation of these data,non-linear Nelder Mead method was used to obtain multivariate relationships of efficiency and heat-transfer fluid outlet temperature. The relationship will be an important reference to the setting experiment parameter and improving the performance of parabolic trough receiver.%在已有模型的基础上,重新选择实验关联式,建立了计算模型.求解后,将计算结果与实验结果比较,证明该模型优于原有模型.使用该模型计算了不同辐射强度、工质入口温度、流量下的效率与出口温度,通过对这些数据的分析和整理,采用非线性Nelder Mead算法进行拟合,得出了以辐射强度、工质入口温度、流量为变量的LS-2型集热器效率和工质出口温度的多变量关系式.该关系式对设定实验参数及进一步提高聚光集热器性能具有指导意义.
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