可再生能源2024，Vol.42Issue(1)：30-37,8.
新型槽式太阳能真空吸热管设计方法及其光学性能研究
Design method and optical performance research of a new vacuum absorber tube of parabolic trough collector
摘要
Abstract
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.关键词
槽式太阳能集热器/真空吸热管/聚光比/能流密度分布/光学效率Key words
parabolic trough collector/vacuum absorber tube/concentration ratio/solar flux distribution/optical efficiency分类
能源科技引用本文复制引用
余强,单文玺,李自豪,雷东强..新型槽式太阳能真空吸热管设计方法及其光学性能研究[J].可再生能源,2024,42(1):30-37,8.基金项目
北京市自然科学基金面上项目(3222033) （3222033）
国家自然科学基金面上项目(52376219). （52376219）
