地底風管預冷系統之建築節能模擬研究

在空調系統中，外氣之冷卻耗電量佔比相當大，因此探討如何有效利用自然資源減少用電量是本研究重點。本論文主要研究在於將高溫外氣引入地底並利用土壤的環境溫度冷卻外氣，以減少使用空調系統在冷卻外氣上的用電量。本研究以台灣北部實際建築為模擬對象，在地底以風管通風系統進行外氣預冷節能模擬分析。本論文採用美國Fluent Inc.所開發以有限體積法(FVM)為架構的計算流體力學模擬軟體Fluent，並結合DOE-2建築動態能耗模擬軟體進行電腦模擬分析。探討外氣溫度引進風管通風系統經環境溫度而降溫效果，解析節能與風量的關係。本研究以中央氣象局氣象7月資料為模擬條件進行模擬，在1m/s時預冷最大溫差可達8.64℃，風速為3.5m/s時最大預冷溫差為8.27℃。把CFD模擬結果回饋到建築能源模擬時，我們可以減少外氣負荷相對可降低冰機耗電，因風速不同相對節能量也不同，以1m/s可減少約3.9%，當進風速度為3.5m/s時可有最佳節能效果達14.63%。

關鍵字

CFD ；地底風管預冷；外氣負荷

並列摘要

This research aims at reducing the energy consumption of outside air cooling load, which shares the big percentage of energy consumption in HVAC system, through the free cooling method. An underground pre-cooling duct system for outside air was proposed to reduce the outside air cooling load. The CFD and energy building energy simulation were implemented in this research. In order to simulate the cooling effect prediction of underground pre-cooling duct system, this research uses the software of computational fluid dynamics program- FLUENT based on Finite Volume Method (FVM) that is developed by FLUENT Inc. in the U.S. It also combines with the DOE-2 dynamic simulation program to proceed the energy saving analysis and the relation between energy saving and the intake flow rate of outside air. Based on the weather data of July in Taipei, the outside air temperature could be reduced by as much as 8.64 ℃ at air speed of 1m/s and 8.27℃ at 3.5m/s by CFD analysis, which accordingly resulted in 3.9% and 14.63% energy saving through the energy saving simulation thereafter.

並列關鍵字

CFD ； Underground Pre-cooling Duct System ； Out-side Air Cooling Load

參考文獻

[4] 林建甫，「台灣高雄地區地下風道系統之降溫效益評估，成大博論，2010

[3] 李宗儒，「中庭自然通風節能技術之研究」，臺北科技大學碩士論文，1999

[6] S.M. Jafarian、S.M. Jaafarian、P.Haseli、M.Taheri，「Performance analysis of a passive colling system using underground channel」，2010

[7] Atelier of the Chief Government Architects，「Green Architecture 5 sustainable buildings」

[13] Huijun Wu、Shengwei Wang、Dongsheng Ahu，「Modelling and evaluation of cooling capacity of earth-air-pipe systems」，Energy Conversion and Management48，2007

國際替代計量

地底風管預冷系統之建築節能模擬研究

全文下載

主題瀏覽