Analysis of Borehole Heat Exchangers Design in View of Stream of Heat Exchanged Maximization with the Rock Mass
- Key words
- borehole heat exchanger designs, heat transfer factor, BHE heat resistance, heat pump, low temperature geothermal energy
- Conference
- World Geothermal Congress
- Year
- 2010
- Session
- 29. Geothermal Heat Pumps
- Language
- English
- Paper number
- 2930
Full text
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Abstract
Five borehole heat exchangers of different design were made at the Faculty of Drilling, Oil and Gas AGH University of Science and Technology in Cracow (Poland). These are a coaxial system, a single and double U-pipes. Different grouts of various heat conductivity were used for sealing. The effective heat transfer value (eff) of the drilled profile and the heat resistance (Rb) of the heat exchanger were compared on the basis of thermal response tests (TRT) performed at various heat carrier streams. As a result various efficiency values were obtained for different technological solutions of borehole heat exchangers.
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