• Journal of Urban Science
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• v.13 no.1
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• pp.65-74
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• 2024

This study is a preliminary study to establish the criteria for evaluating the performance of the window-integrated ventilation system. This study analyzed various references that can evaluate the performance of the ventilation system and established the evaluation method. In addition, the performance evaluation method was quantitatively evaluated by conducting a pilot experiment to verify and supplement the performance evaluation method of the ventilation system. The performance of the ventilation system was categorized into ventilation, air quality, airtightness, noise, visibility and view according to the evaluation category. In particular, according to the ventilation and air quality evaluation, it was found that the indoor carbon dioxide concentration can be reduced by about 14 % when the window-integrated ventilation system is applied. The ventilation performance evaluation method and experimental data of this study will serve as basic data for subsequent studies to establish comprehensive performance evaluation criteria for similar ventilation systems.

• Journal of Korean Society for Atmospheric Environment
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• v.31 no.4
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• pp.385-395
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• 2015

This study evaluated indoor environmental characteristics in an office room equipped both with ventilation window system and central cooling system. Fresh air is supplied only by the central cooling system whereas indoor air is discharged outside through both ceiling diffuser and a ventilation window system. Numerical study is conducted by changing the volumetric flow rates of exhaust ports of each system. For estimating the performance of this coupled system, $CO_2$ concentration and Predicted Mean Vote (PMV) were calculated using Computational Fluid Dynamics (CFD) simulation. The more the ceiling diffuser exhausts indoor air, the more the $CO_2$ concentration decreases. However, when the ventilation window system exhausts more indoor air, thermal comfort level gets improved in the office room with cooling system. Therefore, when the ventilation window system is operated, the coupled operation with central cooling system should be considered for enhancing indoor air quality and thermal comfort, together.