AUTHOR=Li Zhenzhong , Wang Bowen , Xu Liangjin , Wei Jinjia , Bu Shanshan , Chen Deqi 

TITLE=Numerical study on influence of wind on thermal performance of a solid particle solar receiver

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.916559

DOI=10.3389/fenrg.2022.916559

ISSN=2296-598X

ABSTRACT=The effects of wind speed and wind attacking angle on thermal performance of a solid particle solar receiver (SPSR) are studied by numerical simulation. In addition, the effect of aerowindow on the efficiency of solar receiver is also explored. The results show that under different wind speeds and attack angles, wind can differently prevent hot air from flowing out and carry cold air into the solar receiver. These two effects compete with each other, resulting in complex influence law of wind on receiver efficiency. Generally, the increasing wind speed will eventually lead to the negative effect on the thermal efficiency of receiver. At the incident radiation aperture, aerowindow formed by the air nozzle can effectively reduce convection heat loss and significantly improve receiver efficiency. Under the simulation conditions of the present study, there is an optimal air jet velocity to maximize the protection effect of aerowindow. The heat receiver efficiency increases from 41.7% to 58.2% when the wind is 2.5 m/s and the wind attacking angle is 135°. In the analysis of the energy balance inside the solar receiver, the proportion of radiation heat loss is about one-third, and it is not affected by aerowindow. Thus reducing radiation heat loss is very important for further improving receiver’s efficiency of SPSR.