| Title |
Numerical Analysis for the Effect of Ground and Groundwater Conditions on the Performance of Ground Source Heat Pump Systems |
| Keywords |
지열히트펌프시스템 ; 수치시뮬레이션 ; 케이스스터디 Ground source heat pump ; Numerical simulation ; Case Study |
| Abstract |
Recently, ground source heat pump (GSHP) systems have been introduced in many modern buildings which use the annually stable characteristic of underground temperature as one of the renewable energy uses. However, all of GSHP systems cannot achieve high level of energy efficiency and energy-saving, because their performance significantly depends on thermal properties of soil, the condition of groundwater, building loads, etc. In this research, the effect of thermal properties of soil on the perfomance of GSHP systems has been estimated by a numerical simulation which is coupled with ground heat and water transfer model, ground heat exchanger model and surface heat balance model. The thermal conductivity of soil, the type of soil and the velocity of groundwater flow were used as the calculation parameter in the simulation. A numerical model with a ground heat exchanger was used in the calculation and, their effect on the system performance was estimated through the sensitivity analysis with the developed simulation tool. In the result of simulation, it founds that the faster groundwater flow and the higher heat conductivity the ground has, the more heat exchange rate the system in the site can achieve. |