Dissertation
Dissertation > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Air-conditioning > Air-conditioning systems

Ground Source Heat Pump Wells Numerical Simulation and Computer-Aided Software Development

Author JiangQiuYun
Tutor MaYunDong
School Dalian Jiaotong University
Course Environmental Science
Keywords Energy Conservation Groundwater Source Heat Pump Boundary Set Numerical Simulation Optimization Design
CLC TU831.3
Type Master's thesis
Year 2011
Downloads 98
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Energy conservation is one of the major social problems in the world today. The ground water source heat pump system has been promoted as a new renewable energy technology in the world. Due to the shallow groundwater’s temperature is constant, this system uses groundwater as an energy carrier. Using the compressor system, the heat within the buildings transferred to the groundwater in the summer and conversely in the winter. The bottleneck problem is the poor efficiency during operation the groundwater source heat pump system. Only by consuming more energy to draw more groundwater for the buildings’heat transfer because of the unreasonable layout of groundwater heat source wells, improper equipment selection or unfavorable flow velocity of groundwater. It is necessary that the groundwater heat source wells’layout should be optimization design according to the hydromechanics and the fundamental partial differential equations of thermodynamics.Groundwater source heat pump system has great impact on the temperature of groundwater for a long-term. According to the continuity equations, motion equations and energy equations of fluid cylindrical coordinate system and the boundary conditions of pumping production and injection well, the forced convection in turbulent flows model of smooth cylinder has been established. Consider three ways of heat transfer, the inside wall of cylinder based on solid heat conduction theory and the other parts of the drill based on fluid convective heat transfer. Groundwater advection has great impact on the heat transfer of groundwater heart source system in the soil and the temperature of groundwater for a long-term. It needs to be a reasonable layout. From Darcy’s law, to analyze the heat transfer of groundwater heat source wells in saturated soil. The coupled Thermal-Hydrological-Mechanical model has been established. Study on different groundwater advection velocity effect on temperature for the support of system’s optimal design and reasonable parameters. Using COMSOL Multiphysics software to analyze the coupled Thermal-Hydrological Mechanical model simulation. Theory and example show that this model can be applied in the " simulation of groundwater source wells under coupled coupled Thermal - Hydrological Mechanical conditions by the setting of material, bound and mesh. Using Visual Studio integrated development environment to compile the ground source heat pump computer-aided design software for engineering designers.

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