Optimized Design of Ground-Source Heat Pump System Heat Exchanger

The research of heat pump mainly focus on experimental research which emphasizes the determination of heat transfer per unit depth, system COP, reasonable buried pipe spacing, soil thermal physical property and so on, but there has been no breakthrough in the aspect of how to ensure the reliability of the system during a long runtime. This paper first heat exchanger, heat pump, the mathematical pump and buildings was modeled and integrated by the mean of connection condition. The optimized method of the heat exchanger was puts forward. The drill hole depth and drilling hole number are taken as optimization variables, the inlet temperature as objective function. Through a case study, the tradition calculation and optimized drill length was compared. The result shows the optimized design method can decreased drill length and number.