title: Comparison-based optical study on a point-line-coupling-focus system with linear Fresnel heliostats.
abstract: Concentrating the concept of a beam-down solar tower with linear Fresnel heliostat (PLCF) is one of the feasible choices and has great potential in reducing spot size and improving optical efficiency. Optical characteristics of a PLCF system with the hyperboloid reflector are introduced and investigated theoretically. Taking into account solar position and optical surface errors, a Monte Carlo ray-tracing (MCRT) analysis model for a PLCF system is developed and applied in a comparison-based study on the optical performance between the PLCF system and the conventional beam-down solar tower system with flat and spherical heliostats. The optimal square facet of linear Fresnel heliostat is also proposed for matching with the 3D-CPC receiver.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Dai
authors.forename: Xian
authors.initials: X
authors.lastname: Li
authors.forename: Lingyu
authors.initials: L
authors.lastname: Zhou
authors.forename: Xuan
authors.initials: X
authors.lastname: Ma
authors.forename: Ruzhu
authors.initials: R
authors.lastname: Wang