基于分析的水体热污染评价方法

Evaluation of Water Heat Pollution Based on Exergy Analysis

将分析与水体热污染结合在一起,从分析角度阐述了水体热污染的概念,并建立了水体热污染的分析模型,给出了温排水和水环境生态系统的计算公式,在此基础上,定义了水体热污染率,并运用于水体热污染评价上。以美国某电厂温排水为例,根据分析法计算了水体热污染率。结果表明,分析能够定量和统一地评价水体热污染程度,与其他评价方法相比,该方法能更加直观地评判水体热污染状况,为水体热污染控制和水资源开发利用提供了科学决策依据。

Combining exergy analysis with water heat pollution,and the concept of water heat pollution is described from the standpoint of exergy analysis.Besides,exergy analysis is applied to evaluate the degree of water heat pollution.In addition,the model of water heat pollution based exergy analysis is set up.Both the calculation formula of cooling water exergy and water environment ecosystem exergy are deduced.Meanwhile,water heat pollution rate is defined on the basis of exergy analysis.And we applied it to evaluate water heat pollution.Furthermore,apower plant in America is taken as an example.Its water heat pollution rate is calculated based on exergy analysis.The results show that the exergy analysis presents a unified thermodynamic measure in the evaluation of water heat pollution.Compared with other evaluation methods,it could be observed directly.And it provides scientific decision basis for the development and utilization of discharge water and water heat pollution controlling.