珠海电厂温排水分布特征及排水工程降温效果研究

Distribution of Warm Discharge Water and Cooling Effect of Drainage Engineering at the Zhuhai Power Station

根据2009-07和2010-01三次调查的数据,分析了珠海电厂温排水分布特征、季节变化;同时,利用调查资料分析排水明渠和跌入式阶梯的降温效果。结果显示,以排水口为中心,电厂温排水向外海扩散的距离越远,水温越低;最高温升4℃的影响面积小潮期大于大潮期,冬季大于夏季。电厂排水方式采用排水明渠有一定的降温效果,但效果不太明显,而温排水经跌入式阶梯跌落入海的降温效果较为突出,平均降温约3.7℃。

Distributions and seasonal variations of the warm discharge water from the Zhuhai Power Station are analyzed based on the data obtained in July 2009 ,December 2009 and January 2010 .Meanwhile ,the cooling effect of drainage engineering such as surface w ater channel and falling into step is also analyzed using those data .T he results show that taking the outfall as the center ,the further the warm discharge water from the power station moves toward the sea ,the lower the water temperature drops .The sea surface area influenced by the highest temperature rising （4 ℃） is larger in the neap season than in the spring season and in winter than in summer .The drainage ways ap-plied by this power station have different cooling effects .The surface water channel has a certain cooling effect ,but not apparent ;whereas the way of falling into step has a substantial cooling effect ,with the average temperature reduction being about 3 .7 ℃ .