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 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 …

simulation of energy flows and temperature changes in and around a borehole heat exchanger when a fluid circulates through a U … obtained from experiments with real borehole set-ups in Cyprus. Then the validated model is used to study the heat flow and the …, the variation of the ground thermal conductivity and specific heat and the borehole filling material affect the …

. First, a one-dimensional radial numerical heat transfer model is developed to evaluate heat transfer from the borehole wall … using temperature measurements. The apparatus mimics the behavior of a geothermal borehole and uses a homogeneous saturated …

of safe and consistent water supplies for drinking and other domestic or agricultural uses. Borehole supplies are capable …

Analysis of borehole thermal resistance is important for the standard sizing of ground heat exchanger (GHE). In this … paper, a p-linear dimensionless average fluid temperature is proposed to estimate borehole thermal resistance. A p …

properties. A ground loop consisted of a rectangular field of 15 borehole heat exchangers is utilized to cover building loads …. GLD 2009 sizing software calculates borehole length setting two different fixed temperatures for the heat carrier fluid …

Energy piles have recently emerged as a viable alternative to borehole heat exchangers, but their energy efficiency has …

and borehole thermal resistance as parameters. An in-situ thermal response test provides a method to estimate these two … for the late-time period of the in-situ test. With this model one can estimate the soil thermal conductivity and borehole … length of the borehole. The analysis also indicates a p-linear averaging method gives smaller errors than the mean …