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The downhole heat exchanger (DHE) geothermal system is commonly used for space heating in the residential and commercial buildings. The reservoir properties have significant effects on the reservoir heat production capacity of DHE geothermal system. However, to the best of our knowledge, few researches are conducted to study this problem. In this paper, an unsteady-state fluid flow and heat transfer...
Heat extraction from a geothermal reservoir using a single U-tube in a reservoir has been applied in the field. The advantages include extracting only heat instead of water. Based on the geological data of Bazhou geothermal field, China, a three-dimensional steady state numerical model, including the U-tube, wellbore and reservoir is established to analyze the entire flow field comprehensively. The...
A downhole heat exchanger (DHE) geothermal system has been widely used for space heating in commercial and residential buildings. The DHE is important in heat extraction performance of the geothermal system. Nevertheless, to the best of our knowledge, the single U-tube is the most common configuration for a DHE. An investigation of the heat extraction performances of various DHE configurations is...
Geothermal energy is one of the most promising renewable resources and an alternative to conventional fossil fuels. Downhole heat exchanger is the most common form used for exploitation. Based on the geological data of Xinji geothermal field, China, the entire flow field of a single U-tube downhole heat exchanger inside the borehole is analyzed comprehensively by a three-dimensional steady state model...
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