A numerical study was conducted to evaluate thepotential for using a Wellbore Heat Exchangermodel for power generation. Variables studiedincluded operational parameters such ascirculation rates, wellbore geometries andworking fluid properties, and regional propertiesincluding basal heat flux and formation rocktype. Energy extraction is strongly affected byfluid residence time and heat transfer contactarea, and by formation thermal properties. Waterappears to be the most appropriate working fluid.Aside from minimal tubing insulation, tubingproperties are second order effects.On the basis of the sensitivity study, a Best Casemodel was simulated, and results comparedagainst existing, low-temperature powergeneration plants. Even assuming ideal workconversion to electric power, a wellbore heatexchange model cannot generate 200 kW at theonset of pseudo-steady state. Using realisticconversion efficiency, the method is unlikelyable to generate 50 kW.
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