闭式冷却塔直接供冷及其经济性分析  

Direct cooling by a closed cooling tower and its economic analysis

作　　者：朱冬生[1] 涂爱民[1] 

机构地区：[1]华南理工大学传热强化与过程节能教育部重点实验室

出　　处：《暖通空调》2008年第4期100-103,61,共5页Heating Ventilating & Air Conditioning

基　　金：广东省关键领域重点突破项目(编号:B10-B2060090);广东省自然科学基金重点项目(编号:04105950);高等学校博士学科点专项科研基金项目(编号:20050561017);教育部新世纪优秀人才计划项目(编号:NCET-04-0826)

摘　　要：对过渡季或全年需要供冷的空调系统,提出了在室外环境湿球温度比系统要求的冷水温度低3～5℃时制冷机停止运行,利用蒸发冷却技术由闭式冷却塔直接为系统提供冷量的节能方案;采用对数平均温差法计算得到了系统转换为直接供冷模式的工况条件;实例分析表明,采用闭式冷却塔在主机不运行工况下直接供冷节能效果明显,增加的设备投资可在两年内收回,具有较好的经济效益。Puts forward the energy saving scheme using evaporative cooling where the closed cooling tower serves for air conditioning systems directly without operation of refrigerating machines when the outdoor wet-bulb temperature is 3～5℃ lower than the required chilled water temperature in transition seasons even the whole year. Obtains the condition of the system shifting to the direct cooling operating mode by using logarithmic mean temperature difference method. The case analysis result indicates that the effect of energy saving is obvious when the direct cooling mode is adopted under the condition without operating the refrigerating machine, and that the additional equipment investment can be recovered in less than two years, with a better economic benefit.

关 键 词：蒸发冷却 闭式冷却塔 直接供冷 节能 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]