空冷平台提升换热效率装置的监测实验研究

Experimental Study on Monitoring of Heat Exchange Efficiency of Air-cooled Platform

电厂空冷机组的换热效率极易受所处环境风的影响,在其空冷平台下设置智能提升换热效率装置,将空冷平台下方全封闭,通过智能控制系统传感器识别环境风速、风向,根据程序计算由计算机通过执行机构自动完成对风障叶片单元模块的开启,最大限度满足轴流风机进风量,保证热量交换效率。监测加装空冷平台提升换热效率装置对空冷平台换热效率的影响,结果表明在大风条件下,汽轮机运行背压显著降低,稳定在正常背压,在小风条件下,改善了空冷平台周围的流场,背压稍有降低。所得结论空冷平台提升换热效率装置在不同风向下使机组风机平均流量差异不超过设计限额,使风机入口平均温度降低,降低背压,进而使冷凝器换热效率提升,提高发电量及发电的安全性,同时节能减排,大大减少电厂的煤炭消耗,为改善环境风工况下空冷平台性能提高及防风设计提供参考。

The heat transfer efficiency of the air-cooled unit of power plant is very susceptible to the influence of the ambient wind.Under its air-cooled platform,an intelligent heat transfer efficiency device is set up,and the air-cooled platform is completely enclosed through the intelligent control system sensor to identify the environmental wind speed and the direction of the wind,the computer automatically completes the opening of the blade of wind barrier through the actuator according to the program,and ensure the efficiency of heat exchange.The effect of heating efficiency device on the heat transfer efficiency of the air-cooled platform is monitored.The results show that under high wind conditions,the running back pressure of the steam turbine is obviously reduced and is to be stable under the normal back pressure and under the condition of small wind,the flow field around the air-cooled platform was improved with a slight reduction in back pressure.The results show that the difference of the average flow rate of fan in the air-cooled platform under different wind directions does not exceed the design limit so that the average temperature of the inlet of fan is lowered,the back pressure is reduced,and the heat transfer efficiency of the condenser is increased,improving the safety of power generation and power generation,saving energy and reducing emissions,thus greatly reducing the consumption of coal in power plants.It provides references for the improvement of the performance of air-cooled platform and the design of air-cooled platform under environmental wind conditions.