壁対面経路に対する換気塔利用の有効性に関する評価密集市街地における換気塔を利用した通風•換気促進に関する研究第1報

摘要

本報では、CFDを用いた事前検討から換気塔の性能を定量的に評 価するためのモデルを提案し、そこから算出されたサイズの換気塔 を検討対象に風洞実験およびCFDシミュレーション実施した結果、 以下に示す知見を得た。%For healthy living and energy conservation, architectural design which promotes natural ventilation is one of the effective measures. However, it is often difficult to effectively utilize natural ventilation in the city because of the difficulties in predicting the wind direction angle and problems of extremely narrow building intervals. To address these problems, this study focuses on a use of residential ventilation tower in order to effectively utilize the renewable energy resources available overhead without using any power or moving parts. In this paper, in order to quantitatively evaluate the ventilation performance of a residential ventilation tower, size of ventilation towers with equivalent ventilation resistance as through the existing wall face openings was calculated. From the results of wind tunnel experiments and CFD simulations, then, it demonstrated that utilizing the ventilation tower would promote ventilation regardless of wind direction angle and density of the cities.