异形钢管蒸发式冷凝器的传热与能耗性能  

Heat and power characters of evaporative condenser with special-shape steel tubes

作　　者：蒋翔[1] 李元希[1] 涂爱民[1] 朱冬生[1] 

机构地区：[1]华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室,广东广州510640

出　　处：《现代化工》2008年第9期66-70,72,共6页Modern Chemical Industry

基　　金：教育部博士点基金项目(20050561017);粤港关键领域重点突破招标项目(2007A010701001);广州市科技成果转化项目(2007C13G0041)

摘　　要：提出了弹形管和扭曲管对蒸发式冷凝器强化传热,测试了冷却水喷淋密度和风速对其传热与能耗性能的影响,并与圆管进行了对比。研究结果表明,传热系数和能耗均随冷却水喷淋密度和风速的增大而增大,但冷却水喷淋密度增大到一定值后,传热系数基本不变甚至略有减小;弹形管和扭曲管比圆管的传热系数分别高9·2%～19·0%和18·0%～33·1%,总能耗分别低2·6%～4·9%和高2·6%～4·9%,综合性能比分别高11·1%～23·0%和16·7%～23·7%。To enhance the heat transfer and flow processes, both especial-shape tubes that included bullet-tube and twist- tube are used in the evaporative condenser, and compared the existing round-tube. An experimental system is established, heat transfer coefficient and power performance characters of the evaporative condenser are investigated with various operation parameters. The results indicate that the heat transfer coefficient and power are increased with the airflow velocity and sprayed water flowing rate, while the heat transfer coefficient is changeless after the sprayed water flowing rate reaches a minimum of 0.055 kg/（m·s）.The heat transfer coefficient of the bullet-tube is 9.2% - 19.0% more higher than that of round-tube in evaporative condenser,while the power decreased 2.6% -4.9%. The heat transfer coefficient of the twist-tube is 18.0% - 33.1% more higher than that of round-tube in evaporative condenser, and the power increased 2.6 % - 4.9 %.

关 键 词：蒸发式冷凝器 节能 节水 强化传热 异形管 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TQ021.3[动力工程及工程热物理—热能工程]