). Multiple ground layers with regard to GHE and the presence of more than one loops in each borehole (multiple U-tubes) are … study of a double U-tube GHE in a single borehole and the assessment of its efficiency with regard to its building cost … developed for energy flows and temperature changes in and around a borehole, when a fluid circulates through single and double U …

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 …

A modified model for a borehole ground heat exchanger borefield (BHE) of a ground-source heat pump (GSHP) system was … inhomogeneous groundwater flow in the soil. The model was validated using FLUENT for a single borehole based on a constant load … along the effective length of the borehole with good agreement. The present model was then used to investigate the effect of …

A numerical model has been developed to study the complex thermal behavior of a CO2-filled vertical geothermal borehole …-state conservation equations of mass, momentum and energy is applied. The borehole is divided into small volume elements due to … relatively significant changes in the thermophysical properties of the fluid. Borehole wall temperature variations as well as …