湖水源热泵退水对湖体温度场影响评价

Impact assessment on the effects of subsiding water of lake water source heat pump systems on lake water temperature

为了评价南京地区某湖水源热泵系统退水对湖体温度的影响,建立了退水水流模型和考虑湖面综合散热系数的温度场模型。通过将水流模型和温度场模型耦合的数值模拟方法分析了湖水源热泵系统在夏季静风,夏季东风,冬季静风和冬季东北风4种典型运行工况下,热泵系统退水对湖体温度场的影响。4种典型工况下的数值模拟结果表明,湖水源热泵退水造成的湖水水温变化在地表水环境质量标准规定的人为影响限制范围之内。不同季节受湖面风速的影响,湖面综合散热系数的改变对湖体温度场分布的影响十分显著。

In order to evaluate the effects of subsiding water of lake water source heat pump system in Nanjing, this paper builds the subsiding water flow model and temperature field model in consideration of The lake integrated coefficient of heat transfer. In this paper, there are four working condition,summer calm wind condition, summer east wind condition, winter calm wind condition, winter northeast wind condition. Using the flow model and the temperature field model coupling numerical simulation method, the paper analyses the effects of subsiding water of lake water source heat pump systems on lake water temperature under this four working condition. The results indicate that the Changes of lake water temperature made by the subsiding water of lake water source heat pump systems are in the anthropogenic influnce range stipulated by the surface water environment quality standards.In different seasons, The lake wind speed is different. The changes of the lake integrated coefficient of heat transfer have significant impact on the lake temperature field.