通風系統風口配置對大型空間之通風性能影響研究

本研究探討以座椅出風系統結合置換通風之應用型態，其氣流分佈之獨特性能否配合劇院大空間熱負荷特性與空間複雜性，形成合理的氣流組織達到降低能耗及空調設計需求雙重要素。研究利用計算流體力學，探討劇院觀眾座席區在不同風口配置下其通風性能及氣流分佈之變化情形，模擬參數規劃除劇院之原有配置外，另外針對座席區之出回風口配置規劃下出風上回風、下出風側回風與上側出風下回風三種案例，透過性能指標評估各配置之氣流組織特性並找出較佳之配置。由研究可發現，座椅下出風方式在氣流分佈均勻性與節能潛力皆優於上側出風方式；對於此座椅下出風之特性上，劇院之原配置案例，因出風受回風口之牽引，在出風風速不足之情形下，有氣流造成局部短循環之慮；上回風及側回風案例之回風口距離出風口位置較遠，故對活動人員區之氣流組織無明顯影響。

關鍵字

大空間建築；通風配置；計算流體力學

並列摘要

An application type combining seat airout system with displacement ventilation is introduced in this study. The key point discussed in this study is whether the uniqueness of its air flow distribution matches the large space heat load characteristic and space complexity of theaters to form reasonable air flow organization, so as to reduce the energy consumption and air conditioning design requirements. This study used computational fluid mechanics to discuss the changes in the ventilation performance and air flow distribution in the auditoria with different vent layouts. The simulated parameter planning considered the original layout of theater, and three cases, including the lower outlet and upper return air, lower outlet and side return air, upper side outlet and lower return air, which are designed according to the air outlet/return air inlet layout of the auditoria. The air flow organization characteristics of various layouts were evaluated by the performance indexes and the better layout was determined. According to the findings, the lower outlet of seat is better than the upside outlet in the air flow distribution uniformity and energy conservation potential; in terms of lower outlet characteristic of seat, the airout of the original layout case of theater is attracted by the return air inlet, if the airout velocity is insufficient, the air flow may cause local small-size loop; in the upper return air and side return air cases, the return air inlet is far from the air outlet, so there is not obvious influence on the air flow organization in the active area.

並列關鍵字

large space building ； vent configuration ； Computational fluid dynamics

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