侧风作用下火电厂冷却塔性能的实验研究

Experimental Research on Wet-cooling Tower Performance Under Cross-wind Conditions

冷却塔是火电厂重要设备之一,冷却塔冷却性能的优劣直接影响机组效率与安全。通过建立火电厂冷却水系统实验平台,研究了侧风作用下冷却塔的冷却性能。研究发现:随着环境侧风的增加,冷却温差和效率呈先减小后增大的趋势,拐点风速值为0.8m/s;迎风面的进塔风速随之变大,背风面的通风量减小;并采用弗劳德准则数分析了环境侧风对冷却塔性能的影响。

Cooling tower is one of the most important equipment of thermal power plant, the cooling performance of cooling towers will affect the efficiency and safety of units. An experimental platform of cooling water system in power plant had been established to study the wet-cooling tower pelformance under cross-wind conditions. Researches show that with cross- wind velocity increasing, cooling temperature difference and cooling efficiency decrease first then increase at the knee point when the velocity value is 0.8m/s; the inlet wind＇at the windward side velocity increases, the leeward side of ventilation decreases. It also analysis the effect from the cross-wind to the performance of cooling towers with Froude number.