摘要
结合机械通风逆流湿式冷却塔自身特点,基于焓差理论建立了冷却塔热力性能变工况计算模型,研究分析了大气压力、干球温度、湿球温度、冷却水量、凝汽器热负荷、冷却面积、通风阻力以及风机风量等参数对冷却塔进、出塔水温的影响规律。结果表明:大气压力和干球温度对出塔水温的影响可以忽略不计,湿球温度是影响出塔水温的主要环境因素;冷却水量、凝汽器热负荷、失效冷却面积、通风阻力均与出塔水温成正相关关系,而风机风量增大,出塔水温会降低。研究结果将有助于准确预测变工况下冷却塔出塔水温的变化趋势,为冷却塔变工况运行调整提供理论依据。
Based on the enthalpy difference theory and the characteristics of the mechanical draft cooling tower, a mathematical method of the cooling tower performance was derived to analyze the influence of operating parameters on tower outlet water temperature. The results show that the influence of atmospheric pressure and dry-bulb temperature on the tower outlet water temperature is negligible. The wet-bulb temperature is the main environmental factor affecting the cooling tower performance. Cooling water flowrate, condenser heat load, failure cooling area and ventilation resistance all have a positive correlation with tower outlet water temperature. While the air flowrate of the fan increases, the tower outlet water temperature will decrease. The above conclusions will help to accurately predict the changing trend of tower outlet water temperature under variable operating conditions, and provide guidance for the adjustment of cooling tower operation under variable conditions.
作者
姚伟民
张瑞华
陈友良
殷春宏
曹琦
张鸿飞
YAO Weimin;ZHANG Ruihua;CHEN Youliang;YIN Chunhong;CAO Qi;ZHANG Hongfei(Jiangsu Huadian Wujiang Cogeneration Co., Ltd., Suzhou 215221, Jiangsu Province, China;Huadian Electric Power Research Institute Co., Ltd., Hangzhou 310030, Zhejiang Province, China)
出处
《发电技术》
2019年第5期493-498,共6页
Power Generation Technology
关键词
冷却塔
冷却性能
出塔水温
变工况
计算模型
cooling tower
cooling performance
tower outlet water temperature
variable operating condition
mathematical model
