Effects of aspect ratio and inlet wind velocity on thermal characteristics of Trombe wall channel under different ventilation strategies: An indoor experiment

Wu, Shuang–Ying; Wu, Long‐Fei; Xiao, Lan

doi:10.1016/j.expthermflusci.2022.110800

Cited by 15 publications

(2 citation statements)

References 42 publications

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“…A typical solar chimney configuration consists of an air channel and a surface absorbing solar energy to induce air flow for ventilation (Chen et al, 2003; Nguyen and Nguyen, 2023; Tan and Wong, 2012). Other forms of solar chimney are Trombe wall (Wu et al, 2023) or double-skin facades (Arabi et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Comparison of the induced flow obtained with 2D and 3D CFD simulations of a solar chimney at different width-to-gap ratios

Nguyen,

Huynh,

Le-Cao

2024

Journal of Building Physics

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Solar chimneys are among the most common methods for natural ventilation of buildings. Computational Fluid Dynamics (CFD) has been widely applied in research and design of solar chimneys. Most of the previous studies are based on 2D CFD models which ignore the effects of the width (the third dimension) of the air channel. In addition, the applicability of 2D models for the solar chimneys with a low width-to-gap ratio is still questionable. This study investigates both 2D and 3D CFD models for window-sized vertical solar chimneys. The 2D model is applied to the domain comprising the central plane of the channel gap ( G) and height ( H) while the 3D model is applied to the domain consisting of the channel gap, height, and width ( W). The flow fields, flow rates and thermal efficiencies computed with the 2D and 3D models at different heights, gaps, and widths are compared. The results show that W/ G is the most crucial factor. The effects of the side walls are significant at a low W/ G but gradually diminishes as W/ G increases. At W/ G = 15, the side wall effects are confined to a region of about 2.6% W. Particularly, for W/ G>8, the differences between the 2D and 3D flow rates and thermal efficiencies are within ±5%. These findings offer a reference for researchers and engineers to select between 2D and 3D CFD models for a specific solar chimney.

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Section: Introductionmentioning

confidence: 99%

Comparison of the induced flow obtained with 2D and 3D CFD simulations of a solar chimney at different width-to-gap ratios

Nguyen,

Huynh,

Le-Cao

2024

Journal of Building Physics

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“…However, not all incident solar radiation can be used entirely (due to several factors, such as diffusion, resistance, and losses); therefore, solar heat gain through a Trombe wall glass layer can be calculated with the following equation [62]:…”

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confidence: 99%

A Review on Trombe Wall Technology Feasibility and Applications

et al. 2023

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The current global energy challenges require strategies to increase energy-independence across regions and individual countries in order to facilitate and foster the utilization of passive energy sources. As such, solar energy utilization for covering and offsetting building heating loads is a sustainable way to reduce energy consumption (electricity, gas etc.) for space heating. Trombe wall technology is a passive building solar heating system that can be modified and applied to mild and cold regions. This work presents a review of Trombe wall system’s feasibility and applications across different climatic regions. Trombe wall systems are applicable as a secondary space heating source in mid-sunshine and cold regions. However, a number of design and structural aspects must be thoroughly considered, including the incorporation of PCMs, and the integration of PV/BIPV elements and other performance-improving aspects to enhance the system’s thermal performance and output. The findings of this work can be used in potential future assessments of the Trombe wall system’s technology in different climatic regions.

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A review of recent techniques in performance augmentation and evaluation metrics of Trombe walls

Gu,

Li,

Xiermaimaiti

et al. 2023

Energy and Buildings

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Effects of aspect ratio and inlet wind velocity on thermal characteristics of Trombe wall channel under different ventilation strategies: An indoor experiment

Cited by 15 publications

References 42 publications

Comparison of the induced flow obtained with 2D and 3D CFD simulations of a solar chimney at different width-to-gap ratios

Comparison of the induced flow obtained with 2D and 3D CFD simulations of a solar chimney at different width-to-gap ratios

A Review on Trombe Wall Technology Feasibility and Applications

A review of recent techniques in performance augmentation and evaluation metrics of Trombe walls

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