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Long-term commercial GSHP performance. 2. Ground loops, pumps, ventilation air and controls.

Author(s) : KAVANAUGH S., KAVANAUGH J.

Type of article: Article

Summary

Ground heat exchanger performance is a critical factor in ground source heat pump (GSHP) system success. The ground heat exchanger type for all but one of the systems surveyed were vertical highdensity polyethylene single U-tubes. Bore length (Lb) is used as a primary indicator, although there are several other factors that affect performance including ground thermal properties (temperature, conductivity, and diffusivity), vertical bore separation, conductivity of the annular grout/fill, integrity of the grout/fill placement, and heat exchanger type. Some scatter in the results is expected since these characteristics varied from site to site and was often not available.

Details

  • Original title: Long-term commercial GSHP performance. 2. Ground loops, pumps, ventilation air and controls.
  • Record ID : 30004647
  • Languages: English
  • Source: ASHRAE Journal - vol. 54 - n. 7
  • Publication date: 2012/07

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