不同波形填料对冷却塔出塔水温及电厂机组热经济性的影响  

Influence of Different Wavy Packing Material on Thermal Efficiency of Power Plant

作　　者：程友良[1] 杨星辉[1] 韩富强[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《水电能源科学》2015年第2期187-191,175,共6页Water Resources and Power

基　　金：国家自然科学基金项目(10672056);中央高校基本科研业务费专项资金项目(10MG33;2014MS110)

摘　　要：为研究不同波形填料基底对冷却塔出塔水温乃至整个电厂机组热经济性的影响,以自然通风逆流湿式冷却塔内不同波形填料基底为研究对象,借助FLUENT软件中VOF两相流模型对不同波形填料基底上的冷却液膜进行数值模拟,基于数值模拟结果,以某电厂为参照基准,采用等效焓降法,计算分析了不同波形填料基底导致的不同出塔水温对电厂热经济性指标的影响。结果表明,波形基底的倾角和振幅不变时,煤耗率随波长的增加而增加;而波长和振幅不变时,倾角的增加将会使煤耗率降低;倾角和波长不变时,随着振幅的增加,煤耗率也会降低。由此得出最佳结构的波形基底,实现了电厂的节能减排。In order to study the influence of different wavy packing material on the outlet water temperature of cooling tower and even the thermal economy of power plant,taking the cooling liquid film flowing on the packing with different waves as research object,it was simulated by using two-phase flow model（VOF）in FLUENT software.The outlet water temperature from the numerical simulation was chosen as the calculation basis and a certain power plant was selected as the reference,the influence of the outlet water temperature due to different wavy packing on the thermal economic indexes of the power plant was calculated and analyzed using equivalent enthalpy drop method.The results show that the increase of its wavelength will increase the coal consumption rate when the angle and the amplitude of the wavy packing are constant;on the other hand,the increase of the angle will decrease the coal consumption rate when the wavelength and the amplitude are constant,and the increase of the amplitude will decrease the coal consumption rate when the angle and the wavelength are constant.Therefore,the optimal structure of the wavy packing is got,and the energy saving and emissions reducing of the plant is achieved.

关 键 词：机组热经济性 不同波形填料 出塔水温 真空度 汽轮机效率 

分 类 号：TK733.1[交通运输工程—轮机工程]