《Table 2 Heat transfer power per meter of heat transfer pipes》

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《Research on single hole heat transfer power of ground source heat pump system》

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According to the monitoring data of the recycling capacity of GSHP units together with temperature of supply and return main，the total heat supply volume of the heat exchange system during a heating period can be calculated.The results show that the heat transferred from gneiss to GSHP system totals 1 235.7×106 k J.Daytime heat supply fluctuates between 154 kw and 201 kw in response to changes of air temperature and operation time of heat pumps.Average output is180.8 kw，which equals to transfer power of heat exchange pipes per meter varying from 11.6 w to15.1 w，with an average power of 13.59 w（Table 2）.