湖水源热泵系统温排水数学模型研究及应用  

Study on mathematical model of thermal discharge from lake water source heat pump systems and its application

作　　者：黄向阳[1,2] 周健[2] 姜文超[2] 刘轶[2] 

机构地区：[1]长江大学城市建设学院,湖北荆州434023 [2]重庆大学三峡库区生态环境教育部重点实验室,重庆400030

出　　处：《安全与环境学报》2010年第3期62-65,共4页Journal of Safety and Environment

基　　金：国家"十一五"科技支撑计划重点项目(2007BAB21B03-1)

摘　　要：根据湖水源热泵系统温排水模拟试验,得到最优排放口形式。基于这种排放口形式,在边界条件中充分考虑湖泊水域的特征,采用有限体积法,构建了基于Fluent软件的湖泊温升分布三维数学模型,并模拟计算了穿孔管横向分散出流射流排放方式下,排放口近水域的温升分布情况,模拟计算结果与试验实测水温吻合较好。对重庆开县人民医院湖水源热泵示范工程在系统最大冷负荷和长期运行负荷2种工况下,温排水对排放口附近水域的温升分布影响范围及程度应用该模型进行了模拟计算。结果表明,2种运行工况下温排水的影响水域面积较为接近,但温升值大小不同。最大冷负荷下温排水影响水域面积仅占湖泊面积的1%左右,而温升超过0.5℃的水域面积未超出湖泊总面积的0.5%。The resuhs from the simulation test on thermal discharge of lake water source heat pump system revealed that the port jet type perforated pipe with horizontal dispersion has minimum impact to the environment. Based on this outflow way and considering the influence of air to the diffusion of superficial water body, three dimensional mathematical model of thermal discharge is constructed by using finite volume method. Temperature rise distribution near the outfall when applying perforated pipe with horizontal dispersion as thermal discharge is simulated with mathematical model based on FLUENT software. The results of model fit well to actual temperature measurements. The model is applied to the lake water source heat pump of KaiXian People＇ s Hospital of Chongqing. The temperature distribution area and influence degree of thermal discharge on the water body near to the ouffall was simulated under the maximum cold load operation mode and normal operation mode. The result indicates that both operation modes have the similar affected water area, but the temperature rise is different with each other. The farthest distance of temperature rise is 35.55 meters and 31.65 meters for two operation mode respectively. The water area affected by the temperature rise is about two percent of overall lake area, whereas the area of temperature rise over 1.5 ℃ is less than 0.5 % out of overall lake area. Both influence degree and the range of temperature rise are within the national standard.

关 键 词：市政工程 水源热泵 湖泊 温排水 数学模型 

分 类 号：X57[环境科学与工程—环境工程] X524