Abstract
At present, being environmental friendly and with the potential of energy efficiency, ground-source heat pump (GSHP) systems are widely used in the world. The GSHP system can transfer heat stored in the earth into a building during the winter, and transfer heat gained in the building into the earth during the summer. An office building in Shanghai which uses a GSHP system and dual-U-pipe vertical geothermal heat exchangers (GHEs) under the ground is taken as an example in this paper for analysis. Experiments on the operation performance of this GSHP system were carried out. When cooling in summer, the soil temperature increased during the day and decreased at night, and the maximum soil temperature reached 29.5 °C. The maximum heat exchange capacity of one borehole reached 53 W/m and the maximum coefficient of performance (COP) reached 4.2, which shows the GSHP system is quite energy efficient. In addition, design and simulation software for the GSHP system was developed by authors. When putting the corresponding parameters of the GSHP system into the software, the simulated results well match the measured ones.
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