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 …

. 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 …