Numerical Simulation Analysis and Full-Scale Experimental Validation of a Lower Wall-Mounted Solar Chimney with Different Radiation Models

Ping Yuan, Zhicheng Fang (), Wanjiang Wang (), Yanhui Chen and Ke Li
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Ping Yuan: School of Architecture and Engineering, Xinjiang University, Urumqi 830047, China
Zhicheng Fang: School of Architecture and Engineering, Xinjiang University, Urumqi 830047, China
Wanjiang Wang: School of Architecture and Engineering, Xinjiang University, Urumqi 830047, China
Yanhui Chen: School of Architecture and Engineering, Xinjiang University, Urumqi 830047, China
Ke Li: School of Architecture and Engineering, Xinjiang University, Urumqi 830047, China

Sustainability, 2023, vol. 15, issue 15, 1-16

Abstract: As a type of passive architectural structure, wall-mounted solar chimneys enhance the natural ventilation volume of a building’s interior, and maximize reductions in the building’s operational energy consumption. They are indispensable in the building’s energy conservation and emission reduction. Therefore, measuring the wall-mounted solar chimney’s flow characteristics and relevant index parameters is particularly important. This paper uses a combination of full-scale experiments and numerical simulation to conduct a detailed analysis of the wall-mounted solar chimney. Four different radiation models, namely DO (discrete ordinates), S2S (surface-to-surface), MC (Monte Carlo), and Rosseland are used for comparison, and the results of the numerical simulation are compared with the experimental data. The results show that the maximum turbulent viscosity of the fluid predicted by the S2S radiation model is higher than that of the MC and DO models by 16.87% and 8.44%, respectively. The errors of the DO radiation model in the midline and glass cover plate direction concerning the experimental results are only 0.33% and 0.15%, respectively. The mistakes of the MC radiation model in these two directions are 0.51% and 0.47%, respectively. The DO radiation model is more suitable in numerical simulation predictions related to the wall-mounted solar chimney.

Keywords: wall-mounted solar chimney; numerical simulation; natural ventilation; radiation model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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