中文摘要：

提出一种基于折平板聚光器的光电光热分频利用系统，利用蒙特卡洛法对比分析3种不同结构分频利用系统的光学性能，重点研究集热石英管的几何参数、表面反射率及真空层对透光效率、光斑均匀性的影响。结果表明：先分频后聚光系统与先聚光后分频系统相比，前者具有更高的光斑均匀度与透光效率，但无法获得高品位热能；先聚光后分频系统中集热管形状分别为矩形与半圆形，矩形集热管系统的透光效率较半圆形集热管系统高，而光斑均匀度较半圆形集热管系统低；在石英管内外壁面间布置真空层，透光效率显著降低，能量损失主要由表面反射所引起。

英文摘要：

The paper proposes a bending-plate type concentrating PV/T system using a selective absorbing/transmitting fluid. The effects of collector tube parameters, reflectivity of the collector tube surface and vacuum layer on optical performance are discussed by Monte Carlo method. The results showed that the light band is more uniform and light efficiency is higher when the light illuminates firstly on heat-collector tube and then concentrate. However, this configuration is difficult to get high-temperature heat as the energy flux density on the surface of collector is low. When the light is firstly concentrated on heat-collector tube, two kinds of tubes are investigated. One is rectangular tube system and another is semicircular tube system. The results indicated that optical efficiency of the semi-circular tube system is lower than that of the rectangular tube system, while uniformity of the former is higher than the later. Moreover, the semi- circular tube system has a higher indicated that the reflection on the geometric concentration ratio under the same condition. In addition, the analysis heat-collector surface is a main reason of the light loss. To promote the temperature of fluid, vacuum layer should be designed in the heat-collector. However, it will lead to a significant reduction of the light efficiency.