Experimental validation of a short-term Borehole-to-Ground (B2G) dynamic model

F. Ruiz-Calvo*, M. De Rosa, J. Acuña, J. M. Corberán, C. Montagud

*Corresponding author for this work

Research output: Contribution to journalArticle

45 Citations (Scopus)


The design and optimization of ground source heat pump systems require the ability to accurately reproduce the dynamic thermal behavior of the system on a short-term basis, specially in a system control perspective. In this context, modeling borehole heat exchangers (BHEs) is one of the most relevant and difficult tasks. Developing a model that is able to accurately reproduce the instantaneous response of a BHE while keeping a good agreement on a long-term basis is not straightforward. Thus, decoupling the short-term and long-term behavior will ease the design of a fast short-term focused model. This work presents a short-term BHE dynamic model, called Borehole-to-Ground (B2G), which is based on the thermal network approach, combined with a vertical discretization of the borehole.The proposed model has been validated against experimental data from a real borehole located in Stockholm, Sweden. Validation results prove the ability of the model to reproduce the short-term behavior of the borehole with an accurate prediction of the outlet fluid temperature, as well as the internal temperature profile along the U-tube.

Original languageEnglish
Pages (from-to)210-223
Number of pages14
JournalApplied Energy
Early online date18 Dec 2014
Publication statusPublished - 15 Feb 2015
Externally publishedYes


  • Borehole heat exchanger
  • Dynamic modeling
  • Ground source heat pump
  • Heating and cooling systems

ASJC Scopus subject areas

  • Energy(all)
  • Civil and Structural Engineering

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