Numerical investigation on the flow and thermal behaviors of the volumetric solar receivers with different morphologies

扫码查看

原文链接

万方数据

外文摘要：Morphologies of the porous materials influence the processes of solar radiation transport,flow,and thermal behaviors within volumetric solar receivers.A comprehensive comparative study is conducted by applying pore scale numerical simulations on volumetric solar receivers featuring various morphologies,including Kelvin,Weaire-Phelan,and foam configurations.The idealized unit cell and X-ray computed tomography scan approaches are employed to reconstruct pore scale porous models.Monte Carlo ray tracing and pore scale numerical simulations are implemented to elucidate the radiative,flow,and thermal behaviors of distinct receivers exposed to varying thermal boundary conditions and real irradiation situations.The findings demonstrate that the foam structure exhibits greater solar radiation absorptivity,while Kelvin and Weaire-Phelan structures enhance the penetration depth under non-perpendicular solar irradiation.In comparison with Kelvin and Weaire-Phelan con-figurations,the foam structure presents efficient convective heat transfer,with the Weaire-Phelan structure showing pronounced thermal non-equilibrium phenomena.The variance in convective heat transfer coefficient between Kelvin and Weaire-Phelan configurations is approximately 8.4％.The foam structure exhibits higher thermal efficiency and flow resistance under non-perpendicular irradiation compared to Kelvin and Weaire-Phelan structures,attributed to its smaller pore size and intricate flow channels.An increase of 1.3％in thermal efficiency is observed with a substantial rise in pressure drop of 32.2％.

外文关键词：

volumetric solar receiverporous morphologypore scale methodsolar radiation absorptionthermal performanceflow resistance

作者：

DU Shen、LI Dong、LI MengJie、HE YaLing

展开 >

作者单位：

National Innovation Platform(Center)for Industry-Education Integration of Energy Storage Technology,Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education,Xi'an Jiaotong University,Xi'an 710049,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaPostdoctoral Research Project Funding in Shaanxi Province

项目编号：

52341601523062722023BSHYDZZ40

出版年：

2024

DOI：

10.1007/s11431-024-2635-9

中国科学:技术科学(英文版)

中国科学院

中国科学:技术科学(英文版)

CSTPCDEI

影响因子：1.056

ISSN：1674-7321

年,卷(期)：2024.67(9)