地下淺層溫能應用技術之研究--以工研院中分院員工餐廳為例

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Title:	地下淺層溫能應用技術之研究--以工研院中分院員工餐廳為例 Technology of Geothermal Energy Used in an Employee's Cafeteria in Taiwan
Authors:	江沅晉徐千曄陳希立余培煜
Contributors:	機械系
Keywords:	地下淺層溫能地埋管熱交換器土壤溫度 geothermal energy Earth-Air Heat Exchanger (EAHE) soil temperature
Date:	2015-06
Issue Date:	2017-05-26 11:01:52 (UTC+8)
Abstract:	地下淺層溫能具有低成本且為再生潔淨自然溫能之優點，近年來在世界各地蓬勃的發展，堪稱地平線下的綠建築。地下淺層溫能利用時，可依照建築物的環境與地理位置特性，設計出各種不同型式之地埋熱交換器，並將地下淺層溫能與現有建築物通風或空調系統相結合，藉由風扇或泵浦等微小電力元件的運轉，即可達到各種不同室內需求溫度，並同時兼顧室內空氣品質與人體舒適度，以減少建築物耗能及二氧化碳排放，創造舒適健康室內居住環境。本研究主要將地下淺層溫能技術應用於工研院中分院員工餐廳空調系統中，利用地表下土壤溫能進行外氣的預泠（夏季）或預熱（冬季），已達到節約能源之目的。本研究分別針對地埋管熱交換器進行設計、施作、監造及性能量測，以得到在各種不同外氣條件下，地表下不同深度（1~4m）之土壤溫度與地埋管系統之操作性能，研究結果顯示；在本研究之量測期間內（2014年7月~2014年12月），7月~10月土壤溫度約介於25~30℃間，在11~12月土壤溫度約介於20~25℃間，而地埋管平均換熱能力約介於26kW to 8kW間。 Geothermal energy, which can be used at green building under sea level, booms world widely in the recent years with advantages of low-cost, renewable and clean. Design for this kind of green building has to consider in many ways, especially in environment and geometrical characteristics. Ground heat exchangers harvest shallow geothermal energy and apply energy to the ventilation or HVAC system of building. The integration system of ground heat exchanger and HVAC system not only achieve different indoor temperature requirement, and good indoor air quality, but also provide high comfort level by operating only low-electricity machines such as fan or pump. Because this integration system utilizes shallow geothermal energy, it reduces the building energy consumption and carbon dioxide emission. In brief, geothermal energy will dedicate to enhance energy conservation, maintain high indoor air quality and reduce carbon emission of building and towards to develop a zero-carbon emission green building.The Earth-Air Heat Exchanger (EAHE) is a passive climate control technique that has application in agricultural building utilizes the underground soil temperature that stays fairly constant at a depth of about 2.5-3 m. The present study undertakes performance evaluation of Earth-Air Heat Exchanger (EAHE) and applies to an employee's cafeteria in Nantou city Innovation & Research Park located in Central Taiwan. The main purpose of this study is the achievement of the transient behaviour of temperature fields for the external air, soil and buried air ducts and the best periods of the operation time for EAHE system device. The mean heat exchange rate including sensible and latent heat decreased from about 26kW to 8kW during the operation days.
Relation:	冷凍空調與能源科技雜誌； 93期 (2015 / 06 / 01) ， P33 - 42
Appears in Collections:	[Department of Mechanical Engineering ] journal articles

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