Influence Analysis of Parameters of a Small-scale Fix-focal Linear Fresnel Lens Solar System Based on a Triangular Cavity Absorber
In order to solve the problems in linear Fresnel solar system,such as cosine loss,end loss and non-uniform distribution of radiant energy flow,a small-scale fix-focus linear Fresnel lens solar system based on the triangular cavity absorber was proposed,and the optical model of the system was established.The model was sim-ulated numerically,and the effect of the triangular cavity absorber parameters on the optical performance of the system was analyzed by the optical software TracePro based on the Monte Carlo ray-tracing method and the sta-tistical analysis software SPSS.The results show that solar time angle has the most significant effect on the opti-cal efficiency factor of the system and uniform factor of energy flow density distribution on the absorbing surface in the cavity absorber,followed by the sun declination angle and the surface absorptivity of the cavity absorber.The average optical efficiency factors of the solar time angle changing from 0°to 60°are 0.782,0.814 and 0.855 respectively when the surface absorptivity of the cavity absorber is 0.75,0.85 and 1.00 in the condition of solar declination angle equaling to 23°27′and the reflectivity of the mirror at the end of the cavity absorber equaling to 0.85.The system performs well and is suitable for application in the field of medium temperature heat collection using solar energy.
万方数据
维普
