Fast Simulation of a Vertical U-Tube Ground Heat Exchanger by Using a One-Dimensional Transient Numerical Model

An explicit one-dimensional transient numerical model has been built for a single-borehole ground heat exchanger, and two computing algorithms are given. The outlet temperature of the U-tube and the soil temperature can be predicted by using arbitrary time-varying load or inlet temperatures as input...

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Bibliographic Details
Published inNumerical heat transfer. Part A, Applications Vol. 60; no. 4; pp. 328 - 346
Main Authors Su, H., Li, Q., Li, X.-H., Zhang, Y., Kang, Y.-T., Si, Z.-H., Shi, X.-G.
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis Group 15.08.2011
Taylor & Francis Ltd
Subjects
Computation
Computer simulation
Grounds
Heat exchangers
Heat transfer
Inlet temperature
Mathematical analysis
Mathematical models
Numerical analysis
Outlets
Simulation
Temperature
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Summary:An explicit one-dimensional transient numerical model has been built for a single-borehole ground heat exchanger, and two computing algorithms are given. The outlet temperature of the U-tube and the soil temperature can be predicted by using arbitrary time-varying load or inlet temperatures as inputs. This numerical model has been compared with analytical models and validated by using test data of three boreholes. Conclusions are that this numerical model is considerably accurate and efficient; the computational time of a one-year-period simulation is about 52 s; recommended is the discrete scheme with 60-s step time and spatial increment of 0.033-0.067 m.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1040-7782
1521-0634
DOI:10.1080/10407782.2011.600600