不同空調通風條件對於室內空間流場之CFD模擬; Simulation of CFD on Indoor Space Flow-Field with Variance Ventilation Conditions

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Title:	不同空調通風條件對於室內空間流場之CFD模擬;Simulation of CFD on Indoor Space Flow-Field with Variance Ventilation Conditions
Authors:	丘建宏;Yian-Hong Ciou
Contributors:	土木工程研究所
Keywords:	計算流體動力學;空間流場;室內環境品質;none
Date:	2010-07-27
Issue Date:	2010-12-08 13:35:04 (UTC+8)
Publisher:	國立中央大學
Abstract:	在都會型社會的環境衛生與國民健康等政策之研訂，室內環境品質的議題，已是產官學等各界所必須面對的挑戰與亟待解決之課題。此外，為求能進一步研訂有效的室內環境品質改善策略或管制方案，對於國人建築上經常採用之空調系統以及物體散發熱能等基礎行為之掌握與空間流場資料之建立，亦已迫在眉睫。有鑑於此，本研究嘗試以數值分析為基礎的計算流體動力學軟體—FLUENT，同時配合Gambit建模工具，針對影響室內空間流場分佈與舒適性的兩大主要因素：空調系統以及物體散發熱能，進行一系列不同空調環境的模擬、比較與分析。初步研究結果顯示：(1)不論空間模型之建置、材料與邊界等各項參數之設定、迭代運算、分析數據與圖形後處理以及動畫展示等能力，已可確認其在室內空間流場分析上具有強大且及時性的運算與分析能力；(2)小口徑的空調管線具有較低與較均勻的速度場與紊流強度場，進而可降低風擊不滿意度；(3)室內空間溫度場的反應主要受控於空調系統的冷空氣，而與回風口配置型態與出風口管徑大小等因素的關連性較低。(4)風擊不滿意度與各流場的關係性，速度場影響最大、紊流強度場其次以及溫度場影響最小。(5)小口徑空調管線數量多寡因素對於各流場平均值有著線性趨勢變化。 The issues of indoor environment quality are a significant challenge to relative organizations for the policies of environment sanitation and national health in city type society. Furthermore, it is extremely urgent that information establishment on fundamental behavior and flow field of air conditioner system and heat flux function for building space in our country. Because, it is in order to be founded effective improvement tactic or control plan for indoor environment quality. Seeing that, the CFD FLUENT program based on numerical analysis and combining with Gambit pre-processing tool are applied to a series of simulation, comparability, and analysis for air conditioner and heat flux of indoor space flow field in this research. Investigation results showed that: (1)It is confirmed that CFD FLUENT program has the powerful operation and timely analysis ability in modeling establishment, set up of material and boundary parameter, iterative calculation, analytic data, post-processing graph, and animated display etc. (2)Small-pipe model has more lower and uniform than general-pipe in velocity field and turbulent intensity field, and for this reason, it can be reduced the draft rate. (3)Temperature field is controlled main to air con type of air return way, pipe size of inlet and outlet etc. (4) The relationship between the Draft Rate and the flow fields, the speed field is the highest relation, the turbulence intensity field is the middle relation ,and temperature field is the lowest relation. (5)T he number of small diameter pipes of the flow field have linear trend for the average value.ditioner system in indoor space, and it is lower correlation with arrangement
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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