Lake Water Source Heat Pump Units Operating Characteristics And Its Impact On The Surrounding Environment

In some regions of our country, with the hot summer and cold winter, the water resource in surface is abundant, especially the surface water of summer and winter has provided the natural advantage for the applications of surface water ground-source heat pump. Although surface water ground-source heat pump has a wide range of promotion in Chain, there are still some problems in design and application of the system. Especially in some big projects, the design does not take full account of water temperature, quantity of water and influence of water quality for the system. At the same time, the problem of pollution of surface water ground-source heat pump is also quite serious. We aim to study each factor and the drainage of hot and cold water, and analysis how they effect storage of ecological system. The environmental evaluation system of surface water ground-source heat pump has been established.An surface water ground-source heat pump of a hotel in Qiandao Lake has been as the research model in this paper. Firstly we introduce the design of survey system, and analysis the simulation of load by using DEST software. Comparing the condition of water resources of Qiandao Lake with the domestic and foreign standards, we confirm the water source in Qiandao Lake is suitable for the development and utilization of surface water ground-source heat pump. The water temperature, water quality, water quantity and water intake and drainage way are all within the scope of our condition, analyzing how they influence the operating characteristics of system. Analyzing the effects of water temperature with different load rate for the unit COP, by establishing the energy consumption model of the heat pump units.Secondly, we take the waters surrounding as the goal, using the computational fluid dynamics software to establish a two-dimensional temperature model, as the initial conditions.Then we simulate how different temperature and water drainage effect on the water temperature distribution.Finally, we analyze the simulation results of project, and confirm the influence of the scope of various temperature rise. The temperature change caused by the drainage in our project is within 2℃,which is in a controllable range of international and domestic standards. Analyzing the environmental factors caused by the temperature change of water in this paper, we determine the main influence factors, and establish the evaluation index system which considers the extent of eutrophication, water quality, ecological quality aspects initially.