Simulation Study Of Wind Heating-ground Source Heat Pump Heating System

As the country vigorously promotes urbanization construction,the heating area of cities and towns in cold and severe areas has rapidly increased,and the forms of heat sources have become diversified.Wind energy and geothermal energy are two kinds of clean and renewable energy.Under the current situation of depletion of fossil energy and the worsening of the environment,both economically and technically are potential energy sources and ideal heat sources with great potential.Aiming at the characteristics of abundant wind energy and available land resources in Chongli District,Zhangjiakou City,Hebei Province,this paper proposes a new type of heating system in which wind-induced heating and soil-source heat pumps operate.The establishment of a new coupling system can not only efficiently use wind energy,but also effectively alleviate the problems of long-term heat extraction from the soil,which reduces the soil temperature,and the operation efficiency of the ground source heat pump system.Due to the complexity of the wind-induced heat-ground source heat pump coupling system,a simplified model can be established for the system.In this paper,the system is divided into two independent large modules,namely the wind heating module,the ground source heat pump-floor radiant heating module,and then the two large modules are detailedly modeled,and the dual sources are completed through the coupling between the small modules.Operational analysis of heat pump systems.In the process of establishing a wind-induced heating model,a wind turbine model is first established to determine the optimal scaling factor between the rotational angular velocity of the wind turbine and the dominant wind speed to achieve the maximum capture of wind energy by the wind turbine.The simulation model of the wind heating system based on the mathematical model of the wind turbine,the heater,and the heat exchanger in the wind heating system,intuitively reflects the parameter relationship of the various components of the hydraulic wind heating system and the resulting causes.Thermal effect.The maximum heating efficiency obtained by wind heating is 55.8%.The data can provide a certain theoretical basis for the application of wind heating system in heating.Generate model code of wind heating system through simulation model,which provides convenience for system optimization.When a ground source heat pump-floor radiant heating model is established,the model is divided into two small modules: a heat pump unit and a buried tube heat exchanger.For theheat pump unit,it is simplified as an energy transmission device for modeling.The establishment of the buried pipe heat transfer model combines the domestic and foreign research on the heat transfer of the buried pipe with the actuality of this project.Heat flow heat transfer calculation model;briefly introduce and analyze the heat transfer mechanism using floor radiation at the end of the user,and complete the establishment of the ground source heat pump-floor radiation heating model.By simulating the operation of a wind-heated-ground-source heat pump dual-heat source heating system simulation model,the analysis concludes that when the coupled system is operated in parallel mode,increasing the flow through the buried pipe increases the energy efficiency of the system.When the heat source system is operated in series,the circulating medium flowing from the evaporator side of the heat pump unit is first heated by the buried tube heat exchanger and then reheated by the wind heating system.The series mode works better;After comprehensive comparison of parallel mode,it is found that series mode Ⅰ has higher system operation efficiency and better operation effect.From the perspective of technical and economic benefits and environmental and energy benefits,a comprehensive benefit analysis of the project objects in this article shows that compared with the traditional coal-fired boiler heating wind and heat-ground source heat pump coupling system has significant environmental and energy benefits Compared with the heating system using a single ground source heat pump as the heat source,the wind-induced heat-ground source heat pump dual heat source heating system also has obvious improvement effects in all aspects.