Thermal performance and design parameters investigation of a novel cavity receiver unit for parabolic trough concentrator

RENEWABLE ENERGY

卷:168

Article

Mohamad, Khaled^1,3  Ferrer, P.^1,2 

[1] Univ Witwatersrand, Sch Phys, Mat Energy Res Grp, ZA-2001 Johannesburg, South Africa

[2] Univ Witwatersrand, Sch Phys, Mandelstam Inst Theoret Phys, ZA-2001 Johannesburg, South Africa

[3] Int Alatoo Univ, Sch Engn, Bishkek, Kyrgyzstan

关键词: Parabolic trough collector;    Receiver unit;    Heat transfer fluid;    Hot mirror coating;    Cavity absorber;   

DOI  :  10.1016/j.renene.2020.12.089

来源: Elsevier

【 摘 要 】

This paper discusses an improved concept for a cavity receiver unit for Solar Parabolic Trough Collectors (PTC) with the application of hot mirror coating (HMC) on a cavity aperture. This design aims to lessen radiant energy losses while operating at higher temperature by incorporating a variety of optically active layers. The theoretical background is presented, which was derived in previous work, and the resulting implementation in a simulation code. The layout and results of an experiment were discussed, which allowed us to make contact with the simulation with minor adjustments. It was seen that the correspondence between the experiment and simulation results was encouragingly close (Chi squared p > 0.8 and p > 0.95), which allowed investigation of simulations of different receiver designs. Simulated outcomes for the temperature of the heat transfer fluid, temperature maps and efficiencies are presented. Our proposal indicates temperature related benefits when compared to other popular designs in terms of the heat transfer fluid temperature and efficiency, which is about 7% higher at temperatures exceeding similar to 600 degrees C. (c) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

Free