In this paper different approaches to groundwater flow and its effect in the vicinity of a borehole ground heat … exchanger are discussed. The common assumption that groundwater flow in hard rock may be modelled as a homogeneous flow in a … medium with an effective porosity is confronted and models for heat transfer due to groundwater flow in fractures and …

most ground-coupled heat pump environments with the exception of geological settings where there is significant groundwater … numerical groundwater flow and heat transfer model. The input temperature signal is specified at the entrance of the ground heat …

Computer simulation of borehole ground heat exchangers used in geothermal heat pump systems was conducted using three …-dimensional implicit finite difference method with rectangular coordinate system. Each borehole was approximated by a square column … circumscribed by the borehole radius. Borehole loading profile calculated numerically based on the prescribed borehole temperature …

The objective of this study is to show the temperature distribution development in the borehole of the ground … was placed in a vertical borehole (VB) with 30 (VB1), 60 (VB2) and 90 (VB3)m depths and 150mm diameters. The experimental …

groundwater velocity with varying thermal dispersivity values, however, has a significant influence on the thermal borehole …Thermal conductivity and thermal borehole resistance are basic parameters for the technical and sustainable design of … the borehole heat exchanger (BHE) and all transport effects are combined in the parameters of effective thermal …

gradient in and around the borehole is achieved. This causes convective flow in the groundwater due to density differences. In … groundwater filled BHE the convective heat flow influences the heat transport in the borehole system. The size of the influence …During a thermal response test (TRT) or during operation of a borehole heat exchanger (BHE) system, a temperature …

In this paper an improvement of the model CaRM (CApacity Resistance Model) is presented to consider the borehole … thermal capacitance, both of the filling material of the borehole and of the heat carrier fluid inside the ground heat …-coupled heat pump systems. According to the modelling for the surrounding ground, the new approach for the inside of the borehole …

needed during design: both the borehole and the surrounding ground are affected by thermal exchange. The model here presented …-tube or coaxial pipes. Besides, ground temperature at different distances from borehole are calculated, taking into account …