Exploring the influence of optical and thermal parameters on the effectiveness of parabolic trough collector receiver units  

作　　者：Khaled Mohamad 

机构地区：[1]Engineering and Natural Sciences Faculty,SDU University,Almaty,Kazakhstan

出　　处：《Clean Energy》2024年第4期15-33,共19页清洁能源（英文）

基　　金：following entities for their kind support:Engineering and Natural Sciences Department at SDU University;MITP(Mandelstam Institute for Theoretical Research)at the University of the Witwatersrand.

摘　　要：This study investigates the optimization of physical parameters in a parabolic trough collector receiver unit to improve its thermal and optical performance.The parameters include the transmissivity,reflectivity,absorptivity,emissivity and thermal conductivity of the outer cover and absorber pipe.This study utilizes a novel experimental design and a simulation model that accounts for the infrared reflectivity inside the receiver.The simulation results were validated by the experimental data,with a maximum deviation of 8%.The study analyses the effects of varying the physical parameters on the heat transfer fluid temperature,total plant efficiency,temperature profiles,temperature gradients and thermal stress.The study finds that increasing the reflectivity and decreasing the emissivity of the outer cover and the absorber pipe significantly enhance the performance,with maximum increases of 25.8%and 26.5%in total efficiency,respectively.The study also finds that increasing the thermal conductivity of the absorber pipe reduces the temperature gradients and thermal stress,with maximum decreases of 42.2%and 29%,respectively.This study provides valuable insights for optimizing the receiver design and operation in solar-thermal systems.

关 键 词：parabolic trough collector heat transfer fluid receiver unit outer cover absorber pipe 

分 类 号：O43[机械工程—光学工程]