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Theoretical and practical evaluation of an earth-tube (E-tube) ventilation system

Journal Article


Abstract


  • The concept of using earth-tube ventilation system as an energy saving technology has been theoretically

    and practically evaluated. The results have shown that the system has the potential to become an effective

    energy saving technology in buildings. For instance in March and July 2010 the E-tube system was

    able to contribute 62% and 86% of the peak heating and cooling loads respectively and also achieved corresponding

    COPs of 3.2 and 3.53. The average relative humidity level in the heating period was reduced

    by 10% whereas in summer the average humidity level increased by 15% and was attributed to high level

    of latent heat exchanges within the earth-tube. Even though the overall performance of the system was

    found to be encouraging for a typical hot and humid location there are certain conditions of soil such

    as wet, freezing and dry soils which could affect its thermal effectiveness. Further investigation into the

    impact of these factors on E-tube ventilation systems is therefore recommended.

UOW Authors


  •   Darkwa, Jo (external author)
  •   Kokogiannakis, Georgios
  •   Magadzire, C (external author)
  •   Yuan, Kate (external author)

Publication Date


  • 2011

Geographic Focus


Citation


  • Darkwa, J., Kokogiannakis, G., Magadzire, C. & Yuan, K. (2011). Theoretical and practical evaluation of an earth-tube (E-tube) ventilation system. Energy and Buildings, 43 (2-3), 728-736.

Scopus Eid


  • 2-s2.0-78651451101

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3639

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 728

End Page


  • 736

Volume


  • 43

Issue


  • 2-3

Place Of Publication


  • Netherlands

Abstract


  • The concept of using earth-tube ventilation system as an energy saving technology has been theoretically

    and practically evaluated. The results have shown that the system has the potential to become an effective

    energy saving technology in buildings. For instance in March and July 2010 the E-tube system was

    able to contribute 62% and 86% of the peak heating and cooling loads respectively and also achieved corresponding

    COPs of 3.2 and 3.53. The average relative humidity level in the heating period was reduced

    by 10% whereas in summer the average humidity level increased by 15% and was attributed to high level

    of latent heat exchanges within the earth-tube. Even though the overall performance of the system was

    found to be encouraging for a typical hot and humid location there are certain conditions of soil such

    as wet, freezing and dry soils which could affect its thermal effectiveness. Further investigation into the

    impact of these factors on E-tube ventilation systems is therefore recommended.

UOW Authors


  •   Darkwa, Jo (external author)
  •   Kokogiannakis, Georgios
  •   Magadzire, C (external author)
  •   Yuan, Kate (external author)

Publication Date


  • 2011

Geographic Focus


Citation


  • Darkwa, J., Kokogiannakis, G., Magadzire, C. & Yuan, K. (2011). Theoretical and practical evaluation of an earth-tube (E-tube) ventilation system. Energy and Buildings, 43 (2-3), 728-736.

Scopus Eid


  • 2-s2.0-78651451101

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3639

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 728

End Page


  • 736

Volume


  • 43

Issue


  • 2-3

Place Of Publication


  • Netherlands