Design and optimization of a downhole coaxial heat exchanger for an enhanced geothermal system (EGS)

• Published in: Renewable energy Vol. 55; pp. 128 - 137
• Main Authors: Yekoladio, P.J., Bello-Ochende, T., Meyer, J.P.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.07.2013; Elsevier
• Subjects: Applied sciences; Binary cycle; Computational fluid dynamics; cooling; Devices using thermal energy; Downhole coaxial heat exchanger; Earth; Energy; Energy. Thermal use of fuels; Enhanced geothermal system; entropy; Entropy generation minimization analysis; Exact sciences and technology; Exergy analysis; Fluid flow; friction; Geothermal; Heat exchangers; Heat exchangers (included heat transformers, condensers, cooling towers); heat transfer; mass flow; Natural energy; Optimization; pipes; renewable energy sources; temperature; Turbulence; Turbulent flow; Binary cycle; Downhole coaxial heat exchanger; Exergy analysis; Enhanced geothermal system; Entropy generation minimization analysis; Energy analysis; Renewable energy; Heat exchanger; Optimization

The present study considers the design, performance analysis and optimization of a downhole coaxial heat exchanger for an enhanced geothermal system (EGS). The optimum mass flow rate of the geothermal fluid for minimum pumping power and maximum extracted heat energy was determined. In addition, the...