Design method and optical performance research of a new vacuum absorber tube of parabolic trough collector
This study addresses challenges associated with conventional parabolic trough solar power systems,including limited operating temperature and excessive thermal stress caused by uneven energy flux density distribution on the vacuum absorber tube's surface.Rather than altering the parabolic trough collector's structure,we introduce an innovative vacuum absorber tube design.This design involves reducing the diameter of the inner metal tube,shifting it downward,and adding a hyperbolic secondary concentrator above it to enhance solar energy concentration and improve energy flux distribution on the inner metal tube's surface.Simulation results for the new vacuum absorber tube yield promising outcomes.Optically,this novel design increases the concentration ratio from 62 to 71 and improves the uniformity of energy flux distribution by 55.05％.Importantly,these improvements come at the cost of only a 1.88％reduction in optical efficiency compared to traditional vacuum absorber tubes.Consequently,these modifications offer a substantial boost to the overall performance of the parabolic trough collector.
国家科技期刊平台
NSTL
万方数据
维普
