Evaporatively-cooled window driven by solar chimney to improve energy efficiency and thermal comfort in dry desert climate
| Autor: | Walid Abou Hweij, Albert Al Touma, Kamel Ghali, Nesreen Ghaddar |
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| Rok vydání: | 2017 |
| Předmět: |
Engineering
Meteorology Solar chimney Scale (ratio) business.industry Desert climate 020209 energy Mechanical Engineering Window (computing) Thermal comfort 02 engineering and technology Building and Construction Computational fluid dynamics 0202 electrical engineering electronic engineering information engineering Passive solar building design Electrical and Electronic Engineering business Civil and Structural Engineering Marine engineering Efficient energy use |
| Zdroj: | Energy and Buildings. 139:755-761 |
| ISSN: | 0378-7788 |
| Popis: | This study investigates the performance of an evaporatively-cooled window driven by solar chimney attached to external facades for providing acceptable thermal comfort at low energy consumption in an office space. A validated simplified model of the novel system was coupled with a developed 3-D computational fluid dynamics (CFD) model of the office space to predict the space window outer surface temperature. The CFD model was then coupled with a validated bio-heat model that was integrated with Zhang model to predict local and overall thermal sensation and comfort. Two representative hours were selected mainly 14 h and 17 h for hot and dry climate conditions for a space located in Riyadh. The reported results showed significant improvement in overall thermal comfort when the novel system is used to reach a thermal comfort level of 1.42 at 14 h and 1.96 at 17 h using a comfort scale varying from very uncomfortable at −4 to very comfortable at +4. Energy savings reaching 10% were recorded during both hours. |
| Databáze: | OpenAIRE |
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