Experimental Study And Numerical Simulation Of Phase Change Heat Source For Water-bearing Sand Ground Source Heat Pump

In this paper,the method combining engineering experiment and numerical simulation is used to study the soil temperature change and phase change during the winter heating of ground source heat pump with buried pipe heat exchanger of water-bearing sand soil.The main research methods and contents are as follows:Consult relevant material and research progress in Qinhuangdao coastal shoal area design and structures,aqueous sandy soil source heat pump heating engineering experiment,the monitoring of the surrounding water sand heating period of ground heat exchanger of temperature change,heat pump hot water and heat on both sides of the import and export temperature changes,indoor and outdoor meteorological parameters and power consumption,etc.,found that water sand layer heat release potential is tremendous,ground source heat pump heating effect is good,the COP of 2.41 integrated system.The fluid-structure coupling heat transfer analysis of buried pipe heat exchanger in sandy soil was carried out,and the numerical model of buried pipe heat exchanger in sandy soil was established based on the theoretical basis of turbulence model,solidification and thawing model and porous medium model in the numerical solution process.Based on the experiment of ground source heat pump heating project in Qinhuangdao,the physical and geometric model of the buried pipe heat exchanger and the surrounding water sand soil was established.