A 3D Monte Carlo ray tracing model was developed in FORTRAN for a linear Fresnel reflector solar collector in order to investigate and optimize its optical performance. The performance of three typical mirrors, the effects of the mirror aim lines, slope error, and location, etc. were investigated. The results show that the optimal radius and focal length could be found for the cylindrical and parabolic mirrors, respectively. The optimized cylindrical mirror could achieve the same performance as that of the optimized parabolic mirror. The uniformity of the concentrated solar flux on the absorber tube could be improved by designing the aim lines and using the mirror with a certain slope error. In addition, the LFR system whose yearly mean optical efficiency ranges between 52% and 37% from N20° to N50° could be applied in most area of China.
Yu Qiu;雅玲 何;Ze Dong Cheng
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics