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Study on the heat transfer model and the application of the underground pipe system.

Author(s) : ZHOU X., ZHU Y., XIA C.

Summary

The underground pipe system (UPS) cools the intake outdoor air through the underground pipe before supplying it to the indoor space, so that the cooling load of the air-conditioning system of the building can be obviously reduced. In this paper, a quasi-three-dimensional heat transfer model was developed, which was made up with a two-dimensional unsteady heat transfer model of earth and a one-dimensional fluid model of air. The total heat transfer process was considered when the condensation happened on the pipe wall during the calculation. Moreover, the model was validated by the comparison between simulated result and measured data of a built project applied UPS. By means of this model, the earth-to-air heat exchanging process was simulated and the effect of the pipe parameters, such as the length, depth of burial and ventilation velocity of underground pipe system, on the cooling/heating capability was analyzed. The simulated result was also used to direct the design, operation and management of the UPS.

Details

  • Original title: Study on the heat transfer model and the application of the underground pipe system.
  • Record ID : 2008-2641
  • Languages: English
  • Source: Clima 2007. WellBeing Indoors. Proceedings of the 9th REHVA World Congress [CD-ROM + Abstract book].
  • Publication date: 2007/06/10

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