Abstract
The subject of this study is to establish design and operation method of the ground source heat pump system affected by ground water flow. In order to investigate relation between the ground temperature response around ground heat exchanger (GHEX) and ground water velocity, multilayered ground simulation model is developed. It was shown that heat medium temperature is not kept in steady state in thermal response test when the groundwater flow in all geological layer is not generated. It is suggested that the thickness of geological layer with ground water flow and the ground water velocity can be estimated by analyzing the apparent effective thermal conductivity, which is obtained by the thermal resp-1 onse -1test . Also, if the apparent effective thermal conductivity at elapsed time of 50 h is more than 4.5 W・m ・K ,the ratio of thickness of geological layer that have ground water flow with the velocity of 300 m・y-1 is more than 25 % in all geological layer.
