Finite cylinder-source model for energy pile heat exchangers: Effects of thermal storage and vertical temperature variations

  1. Bandos, T.V. 1
  2. Campos-Celador, Á. 1
  3. López-González, L.M. 2
  4. Sala-Lizarraga, J.M. 1
  1. 1 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

  2. 2 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

Revista:
Energy

ISSN: 0360-5442

Ano de publicación: 2014

Volume: 78

Páxinas: 639-648

Tipo: Artigo

DOI: 10.1016/J.ENERGY.2014.10.053 SCOPUS: 2-s2.0-84920719474 WoS: WOS:000347579200062 GOOGLE SCHOLAR

Outras publicacións en: Energy

Obxectivos de Desenvolvemento Sustentable

Resumo

A mean integral solution to the FCS (finite cylindrical source) model for ground heat exchangers that takes into account the heat capacity inside the borehole or foundation and allows estimation of temperature field for an arbitrary borehole configuration is presented as a single integral. Approximate expressions for the average temperature over a wide range of time values are derived analytically in the vicinity of both sides of the finite cylindrical surface of heat source. Exact and approximate results for the mean temperature are compared to those calculated at the mid-depth from the exact solution of the same FCS model.