Performance Enhancement of Parabolic Trough Collector by Using Homogenizer and Spiral

作     者：LI Peijing LIU Taixiu QIN Yuanlong ZHENG Zhimei ZHAO Kai LIU Qibin LI Peijing;LIU Taixiu;QIN Yuanlong;ZHENG Zhimei;ZHAO Kai;LIU Qibin

作者机构：School of EnergyPowerand Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing100190China University of Chinese Academy of ScienceBeijing100049China Department of Thermal Science and Energy EngineeringUniversity of Science and Technology of ChinaHefei230027China Research Institute of Science and Technology of China Three Gorges Group CorporationBeijing100038China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2024年第33卷第2期

页      面：658-674页

核心收录：

学科分类：080703[工学-动力机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 

基　　金：supported by the Distinguish Young Scholars of the National Natural Science Foundation of China (No.52225601) the Major Program of the National Natural Science Foundation of China (No.52090061) 

主　　题：parabolic trough collector homogenizer thermal deformation spiral 

摘      要：In conventional parabolic trough collectors(PTCs),sunlight is concentrated at the bottom of the absorber tube,resulting in a significant circumferential temperature gradient across the absorber tube,heat loss and thermal deformation,which affects the safety and thermal performance of *** this study,a new receiver with homogenizer and spiral(RHS) is proposed,achieving the optical and thermal synergy to ameliorate the thermal deformation of the absorber tube and enhance thermal efficiency.A plane structure homogenizer is designed to improve uniformity of the concentrated solar flux of absorber tube through second *** combination with the spiral,it improves the optical-thermal efficiency of the PTC by enhancing heat exchange between the fluid and the backlight side of the absorber *** performance of the collector is numerically studied by building a three-dimensional coupled light-thermal-structure *** results show that the thermal deformation of the RHS is reduced by more than 96% and the optical-thermal efficiency is improved by 1.2%-0.63% compared with conventional receivers(CRs) under the same inlet temperature *** proposed receiver is validated to be effective in reducing thermal deformation and improving optical-thermal efficiency.