Performance Analysis of a Cooling Room and Thermal Effect of Inside a Heat Body

• Main Authors: WU, Ching-Shing, 吳承興
• Other Authors: Lee Ji-Jen
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/61400789612149839466

碩士 === 大同工學院 === 機械工程學系 === 85 === _摘　　　要本研究的目的在於探討冷房中的散熱效應，討論不同的熱體 放置位置對於冷房內的溫度分佈，以及冷卻過程中冷房居佔空間內溫度與 速度的變化影響，此外也研究冷氣機安裝位置及出口速度的效應。本研究 利用數值模擬作為研究方法，並採取簡單的平均值與標準差來描述三維冷 房內溫度與速度的變化與分佈情形。結果發現，在冷房內放置熱體於不同 位置,大約會提高冷房居佔空間內的平衡溫度0.6度至1度，而降低出風口 速度會延長冷房內溫度至均勻分佈的時間，而冷氣機安裝高度對熱體的散 熱效果則並不明顯。 ABSTRACT This study presents the field distribution of temperature and the variation of air temperature and velocity during the cooling process in the occupied zone of a cooling room with a heat body. And the effect of inletvelocity and the effect of height of air conditioner are also discussed. Numerical simulation is performed to study all the effects in this thesis. For simplicity, the average value and standard deviation are utilized in revealing the state and distribution of air temperature and velocity in a three dimensional cooling room. It is concluded that installing a heat body inside a cooling room will increase the equilibrium temperature by 0.6(C to 1.0(C in the occupied zone. The decrease of inlet velocity will increase the time needed to achieve the equilibrium temperature. The influence of changing air conditioner height is not obvious on the effect of heat flux in occupied zone.