22 May 2008

NUMERICAL SIMULATION OF GROUND HEAT AND WATER TRANSFER FOR GROUNDWATER HEAT PUMP SYSTEM


By utilizing the relatively stable temperature of groundwater, groundwater heat
pump systems can achieve a higher coefficient of performance and can save more energy
than conventional air-source heat pump (ASHP) systems. However, the regulations for
making the well and pumping in the centre of cities are too strict. For the optimization of
design and operation of GWHP systems, it is necessary to develop a method for considering
heat flow under the ground and the building’s condition comprehensively. This paper
describes the optimization of GWHP systems based on an air-conditioning experiment
utilizing real-scale equipment and 3D numerical heat-water transfer simulation. Analysis
results were compared with the experimental results, and the validity of the simulation model
developed in this study was confirmed. Furthermore, optimum operation methods have been
considered by calculating the coefficient of performance for various groundwater and well
conditions.