本文為實際案例,探討桃園國際航空站第一航廈現有汰換冷卻水塔效能分析,利用現有的地形地物,如冷卻水塔尺寸與高度、冷卻水塔與牆面間距等。在運轉時,熱氣回流對冷卻水塔效能之影響。 冷卻水塔主要就是將循環廢熱的冷卻水與塔內中的空氣進行熱交換,使空氣帶走水中廢熱,並由排風口散出至大氣中。 研究方法運用ANSYS Fluent計算流體力學模擬軟體Airpak 3.0,進行電腦模擬分析,評估冷卻水塔的擺設在最佳位置能有效減少熱回流率,使冷卻水塔達到最有效的散熱能力。 本文是針對桃園國際航空站第一航廈汰換直交流式LRC型冷卻水塔之設計以及配置位置的條件下,模擬外界風向與冷卻水塔的回流率關係並搭配水塔周遭牆面的高低與間距來做探討。 模擬結果顯示,冷卻水塔入風面與牆面間距若不足,將使得冷卻水塔回流率提高。調整冷卻水塔擺設間距,能減少回流率產生,使冷卻水塔不受熱回流率影響發揮其散熱性能。
This article provides real-life case study which explores the efficiency of current cooling towers in Taoyuan International Airport Terminal I and employs existing areas, including the size and height of the cooling towers, the distance between cooling towers and walls, etc. In operation, this study demonstrates that the influence of hot air reflows to the cooling towers. Mainly, cooling towers exchange cooling tower water of waste heat recycling and the existing air in the towers which results in bringing waste heat by air and exhausts the air into the atmosphere. Research methods of this study make use of ANSYS Fluent which calculates fluid dynamics to simulate the computer simulating analysis of software Airpak 3.0, evaluates whether setting the cooling towers in the best position can effectively reduce heat reflux rate reaching the most effective thermal capacity. This article aims at the design and setting conditions of cross-flow AC-LRC-type cooling tower in Taoyuan International Airport Terminal I, which simulates the interaction between external wind and reflux rate of the cooling towers , and considers the height of surrounding walls and space. The result indicates that the insufficient distance between the wind surface of the cooling towers and the walls leads to the increase of the reflux rate of the cooling towers. Concisely, the adjustment of display distance may reduce the reflux rate of cooling towers; therefore, the heat dissipation of cooling towers will not be influenced by heat reflux rate.