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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%。
According to the water source heat pump system temperature drainage simulation test, the best form of discharge port. Based on this discharge form, the characteristics of lake waters are fully considered in the boundary conditions. The finite volume method is used to build a three-dimensional mathematical model of temperature distribution in lakes based on Fluent software. The distribution of the temperature rise near the discharge port and the simulated calculation result are in good agreement with the measured water temperature. Based on the maximum cooling load and long-term operating load of the water-source heat pump demonstration project of Kaixian People’s Hospital of Chongqing, the model was used to simulate the range and extent of the influence of temperature and temperature on the distribution of temperature rise in the water near the discharge port. The results show that the water area affected by warm drainage in two operating conditions is close, but the magnitude of temperature rise is different. Under the maximum cooling load, the area affected by warm drainage accounts for only about 1% of the total area of the lake, while the area of the water whose temperature rises above 0.5 ° C does not exceed 0.5% of the total area of the lake.