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Influence of debonding in ground heat exchangers used with geothermal heat pumps

✍ Scribed by Aristodimos J. Philippacopoulos; Marita L. Berndt

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
517 KB
Volume
30
Category
Article
ISSN
0375-6505

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✦ Synopsis

Debonding in ground heat exchangers used with geothermal heat pumps may occur for a variety of reasons, such as shrinkage of the backfill materials or surrounding formation, improper grouting and thermal mismatch. The effect of thermal contact resistance on the heat conduction due to debonding in ground heat exchangers was investigated using a set of onedimensional simplified analytical models as well as two-dimensional finite element models. From the cases studied, debonding at the backfill/pipe interface was found to be of greater significance than debonding between grout and surrounding formation.

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