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运用Fluent软件对重庆市嘉陵江化龙桥段瑞安新天地江水水源热泵系统尾水排入受纳水域的过程进行二维数值模拟,选取Fluent中非耦合、隐式求解器对模型内的定常流动进行求解,得出受纳水域受水源热泵系统温排水影响后的温升面积和温度梯度。结果表明:在温排水流量为2.0×103 m3/h、温差为4℃的条件下,计算该水域沿水流方向温升超过1℃的最大影响距离为150.4 m,温升超过1℃的水域面积约为1 525 m2,为模拟江水面积的8.59%。选取1℃温升值作为温升带的边界控制值,并在热泵系统最大负荷工况下,根据W=Q×ΔT计算研究水域热环境容量为19.402 m3.℃/s,剩余热环境容量为17.736 m3.℃/s。根据地表水环境质量标准,该工程温排水量小于受纳水域的热承载力,不会对受纳水域生态环境造成热污染。
Fluent software was used to conduct two-dimensional numerical simulation of tail water discharge into the receiving waters of Shui’an Xintiandi water source heat pump system at Hualongqiao section of Jialing River in Chongqing. Fluent software was used to solve the steady flow in the model It is concluded that the temperature rise area and the temperature gradient of the receiving water area are affected by the temperature and water of the water source heat pump system. The results show that under the conditions of warm water discharge of 2.0 × 103 m3 / h and temperature difference of 4 ℃, the maximum influence distance of water temperature above 1 ℃ along the water flow direction is 150.4 m and the area of water area whose temperature rise exceeds 1 ℃ It is about 1 525 m2, accounting for 8.59% of the total area of the river. The temperature rise value of 1 ℃ was chosen as the boundary control value of the temperature rise zone. Under the condition of the maximum load of the heat pump system, the calculated thermal environment capacity was 19.402 m3. ℃ / s according to W = Q × ΔT, and the residual thermal environment capacity was 17.736 m3. ° C / s. According to the surface water environmental quality standards, the thermal insulation capacity of the project is less than the thermal carrying capacity of the receiving waters and will not cause any thermal pollution to the ecological environment of the receiving waters.