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Long-term ground-temperature changes in geo-exchange systems.

Author(s) : BERNIER M. A., CHAHLA A., PINEL P.

Summary

This paper examines thermal interaction among boreholes in geo-exchange systems with vertical ground heat exchangers. Borehole thermal interaction is caused by ground thermal imbalances and results in long-term ground temperature changes that can have a significant impact on borefield sizing and heat pump performance. Long-term temperature changes are quantified in this paper using the concept of temperature penalty, which represents an effective increase (or decrease) of the undisturbed ground temperature to account for borehole thermal interactions. Finally, a general correlation, adequate for engineering calculations, is proposed to estimate temperature penalty.

Details

  • Original title: Long-term ground-temperature changes in geo-exchange systems.
  • Record ID : 2009-1316
  • Languages: English
  • Source: ASHRAE Transactions. 2008 Annual Meeting, Salt Lake City, UT. Volume 114, part 2 + CD-ROM.
  • Publication date: 2008/06/21

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