1인 주거 모듈러 유니트의 쾌적환기 개선 가능성 분석

초록

In this study, the possibility of improving comfort ventilation of single-room modular homes for free cooling was examined by usingCFD(Computational Fluid Dynamics) simulation. A modular house with existing residential units connected in parallel and an improved modelwith additional operable window for cross ventilation was selected for comparative evaluation. Conventional single rooms have only oneoperable window at the front, allowing restricted natural ventilation performance. Even though fan-assisted natural ventilation using abathroom exhaust fan was performed, the indoor airflow speed was found to be very low. At this time, the indoor airflow speed canpartially contribute to discharging excessive heat of indoors during intermediate seasons, but it is difficult to improve the thermal comfort ofresidents during the hot summer season. As a result, it was confirmed that the average indoor airflow speed improved from 0.0375 m/s (Case4) under the condition of operating only the exhaust fan to 0.456 m/s (Case 5) when cross ventilation was implemented.. Consequently, thePMV (Predicted Mean Vote) of occupants could be lowered from 1.2 to 0.39. In this study, it was found out that it is practically difficult toprovide comfortable ventilation in a modular single-person residential unit with only one window on the front, and that comfortableventilation performance can be significantly improved by changing the unit layout and adding operable windows.

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