摘 要：为提高太阳能光热转换效率，对同轴非完整型平移抛物面聚光系统进行三维建模，采用蒙特卡洛光线追踪法进行追踪。分别改变接收器和聚光器放置位置，对聚光系统进行优化。通过分析双面受热平板接收器的能量传递及转换过程，建立平板接收器的理论计算模型。对接收器进行热性能计算，分析其热性能的变化规律。研究表明：综合考虑接收器辐射强度均值、辐射热流均匀性、辐射面积等因素的影响，选择将接收器吸热板放置于抛物面轴线远离焦点20～35 mm范围内；环境温度在0～30 ℃变化时，与单面受热接收器相比，双面受热接收器的热效率提高了8.18%～37.01％。

Abstract:In order to enhance the photothermal conversion efficiency of a concentrating solar power system,a three dimensional model for coaxial noncomplete type inparallel moved parabolic concentrating solar power systems was established and the Monte Carlo sun beam tracking method was used to trace the sun beams.The locations of the receiver and concentrator were changed to optimize the concentrating solar power system.Through analyzing the energy transfer and conversion process of the dual-side heating flat plate receiver,a theoretical model for calculating the flat plate receivers was established to calculate the thermal performance of the receivers and analyze the variation law governing the thermal performance of the receivers.It has been found that with the influence of the average value of the irradiance received by the receiver,the uniformity of the radiant heat flux and radiant area being taken into account in a comprehensive way,compared with a single side heating receiver when the heat absorption plates of the receiver are placed at a location where the axial line of the parabolic curvature surface falls in a range of 20 to 35 mm away from the focus point and the ambient temperature varies in a range from 0 to 30 ℃,the thermal efficiency of the dual-side heating receiver can increase by a percentage ranging from 8.18% to 37.01％.

TK519