Abstract
Through the self-developed ground source heat pump ground tube heat transfer mechanism simulation test bench, the purpose of this paper is to explore the heat transfer mechanism of ground source heat pump based on the single U-shaped vertical buried pipe inlet and outlet spacing. The experiment uses the control variable method to measure and record the temperature of each inlet and outlet of the single U-shaped vertical buried pipe and the temperature of each measuring point inside the quartz sand of the backfill material by changing the spacing of the inlet and outlet of the single U-shaped vertical buried pipe. The curve of the temperature of each measuring point inside the quartz sand with time back is drawn and the relation expression is obtained. In addition, the relationship between the temperature difference between the inlet and outlet and the distance between the buried pipes is obtained. The relevant results and conclusions of this experimental study can provide scientific guidance for the practical application of a single U-shaped vertical buried-tube ground source heat pump.
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