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Open AccessArticle

Natural Ventilation Effectiveness of Round Wall-Mounted Vent Caps in Residential Kitchens

Department of Creative Design, National Yunlin University of Science and Technology, Douliu 640, Taiwan
Department of Architecture and Architectural Engineering, Kyoto University, Kyoto 606-8501, Japan
Department of Civil Engineering, National Cheng Kung University, Tainan 701, Taiwan
Author to whom correspondence should be addressed.
Energies 2018, 11(5), 1230;
Received: 21 March 2018 / Revised: 6 May 2018 / Accepted: 8 May 2018 / Published: 11 May 2018
(This article belongs to the Section Energy Storage and Application)
This study explores the effect of different numbers of wall-mounted vent caps and their installation locations on the indoor air environment in residential kitchens, for which limited information is available. Wind tunnel tests were performed to study the induced ventilation rates of a vent cap, and the impact of vent caps on the natural ventilation efficiency in residential kitchens was examined using computational fluid dynamics (CFD) numerical simulations. The results were then applied to determine the appropriate quantity of vent caps and their proper installation location. The wind tunnel test results indicated that outdoor winds with speeds of 0–6 m/s that flow parallel to the wall with a vent cap induce indoor air to exit through the cap with ventilation rates of 0–20 m3/h; when the wind blows perpendicular to the wall, outdoor air with 0–31.9 m3/h flows indoors. CFD numerical simulations showed that the installation of kitchen vent caps can reduce the average carbon monoxide concentration in the cook’s breathing zone. A sufficient quantity of vent caps and the proper installation location are required to ensure the natural ventilation effectiveness of wall-mounted vent caps. View Full-Text
Keywords: natural ventilation; air environment; kitchen; vent cap; CFD natural ventilation; air environment; kitchen; vent cap; CFD
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Lin, Y.-P.; Iba, C.; Lai, C.-M. Natural Ventilation Effectiveness of Round Wall-Mounted Vent Caps in Residential Kitchens. Energies 2018, 11, 1230.

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