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应用能源技术
doi:10.3969/j.issn.1009 -3230.2012.10.0i
2012年第10期(总第178期)
直接空冷系统初始温差值的优化设计
雷振寰,刘齐寿”,谢一民”,魏凯”
(1.华北电力大学(保定)河北保定071003;2.西安交通大学西安;
3.唐山三友热电有限公司河北唐山)
摘要:直接空冷系统设计,核心之一是最佳初始温差值ITD的优化设计。文中介绍了直接空冷系统初始温差值的优化理论,探讨了优化过程和计算方法,由于初始温差和空气侧流速大小关系到空冷系统造价和系统运行费用,所以以这两者作为设计变量,以空冷系统年总费用为目标函数,对某一空冷机组进行了分析,优化设计了机组ITD值,得到系统最小年总费用和最佳ITD值。
关键词:直接空冷系统;初始温差值;ITD设计;设计变量;年总费用中图分类号:TU831.3
文献标志码:B文章编号:1009-3230(2012)10-0040-04
Optimum Design of the Initial Temperature Difference of
DirectAir-CoolingSystems
LEI Zhen-huan, LIU Qi-shou, XIE Yi-min, WEI Kai
(NorthChinaElectricPower University,Baoding071003,China)
Abstract: Optimizing design of the Initial Temperature Difference(ITD), which is one of the significant design parameters in air-cooling systems. An introduction to the optimization theory of direct air-cooling system' s Initial Temperature Difference is being presented, together with an explanation of the optimization process and way of calculation. Because the amount of Initial Temperature Difference( ITD) and the velocity of air side have relation with cost of air-cooling system and system's running expense, these two are acted as design variable, with the total annual expenditure of a direct air-cooling system as the objective function and such a system in a certain region as an example,the system's ITD value was designed optimally to make the total annual cost minimal.
Key words: Direct air-cooling system; Initial temperature difference; Design of ITD; Design varia. ble; Total annual cost
0引言
随着我国十二五计划的开展,电力市场竞争机制的深人的改革与发展,节水已成为我国经济可持续发展战略的重要实施内容之一。作为节水新途径之一的空冷技术,具有良好的经济效益和社会效益,已经表现出蓬勃的发展潜力。同时直接空冷系统以其节水多,设备少,系统简单,空气
收稿日期:2012-0818
修订日期:2012-0829
作者简介:雷报案,男,在读硕士。万方数据
量调节灵活,防冻性能好优于间接空冷系统,成为空冷技术发展的必然方向(1)。
初始温差值ITD是空冷系统最主要的设计参数,ITD值的合理选取能够使空冷系统初投资与空冷机组的运行费用之间获得合理匹配,对提高
直接空冷系统的经济性有着重大意义。 1.1ITD的含义
直接空冷凝汽器的初始换热温差ITD(Initial TemperatureDifference)是指汽轮机排汽饱和温度