基于热污染率的湖水源热泵温排水影响评价方法  

Evaluation on thermal discharge effect from lake water heat pump based on heat pollution rate

作　　者：胡秋明 罗景辉 武雪梅 刘彪 吴晓轩 张昌建 HU Qiuming;LUO Jinghui;WU Xuemei;LIU Biao;WU Xiaoxuan;ZHANG Changjian(School of Energy and Environmental Engineering,Hebei University of Engineering,Handan 056038,China;Redco(Tianjin)Real Estate Co.,Ltd.,Tianjin 300480,China;Northern China Branch,China Construction Eighth Engineering Division Corp.,Ltd.,Tianjin 300450,China)

机构地区：[1]河北工程大学能源与环境工程学院,河北邯郸056038 [2]力高(天津)地产有限公司,天津300480 [3]中国建筑第八工程局有限公司华北公司,天津300450

出　　处：《人民长江》2023年第11期158-165,共8页Yangtze River

基　　金：河北省重大科技成果转化资助项目(21284102Z);邯郸市科学技术研究与发展计划项目(21212128055);河北省创新能力提升计划项目(202250702010094)。

摘　　要：湖水源热泵因其节能及运行稳定等优点而被广泛应用,但是湖水源热泵温排水的排放可能会引发水体热污染问题。通过建立湖水热平衡模型,分析了湖水源热泵温排水的热影响,并根据中国现有的地表水环境质量标准,以湖水温度变化为切入点,将水体热污染定量化,定义了水体热污染率,提出了湖水源热泵温排水影响的评价方法。将该评价方法在南京工程大学天印湖水源热泵系统中进行应用,测试了湖水源热泵系统及湖水的相关参数,得出了最热周和最冷周湖水在竖直方向和水平方向的温度梯度,计算出水体最热周最大和平均水体热污染率分别为0.69和0.48;最冷周最大和平均水体热污染率分别为0.42和0.38,与冬季相比,夏季更容易造成水体热污染。实践表明,该方法可以定量评价湖水源热泵温排水影响,可为类似湖水源热泵的设计应用提供参考。Lake water heat pump(LWHP)is widely used because of its advantages of energy saving and stable operation.But water heat pollution can be generated by the thermal discharge from LWHP.In this paper,the thermal discharge effect of LWHP was analyzed by establishing the lake heat balance model.According to the existing surface water environmental quality standards,and taking the lake water temperature changes as an index,the water heat pollution was quantified by the water heat pollution rate,so a method for evaluating the influence of thermal discharge from LWHP was proposed.By applying this evaluation method to Tianyin Lake LWHP system in Nanjing Institute of Technology,we tested the relevant parameters of the system and the lake water,and obtained the vertical and horizontal temperature gradients of lake water in the hottest and coldest week.The maximum and average water heat pollution rates of the hottest week were 0.69 and 0.48.Besides,the maximum and average water heat pollution rates of the coldest week were 0.42 and 0.38,respectively.Compared with winter,it is more likely to cause water heat pollution in summer.The practice showed that this method can be used to evaluate the influence of thermal discharge from LWHP quantitatively and provides guidance for the design and application of similar LWHP in the future.

关 键 词：湖水源热泵 温排水 水体热污染 热污染率 热平衡 

分 类 号：X524[环境科学与工程—环境工程]