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Predicting the thermal and airflow performance of large spaces.

Author(s) : AWBI H. B., LI B.

Summary

In large glazed enclosures such as atria, temperature stratification is unavoidable because of the large heights involved but the task of the designer is to achieve acceptable thermal environment at ground level. Furthermore, energy savings can be achieved if passive ventilation is used. In the paper the air movement in a parametric atrium building is investigated using computational fluid dynamics. The solar gain through the glazing is calculated. The thermal comfort within the enclosure is calculated using the PPD index. The surface-to-surface radiation exchange is evaluated using a radiation model and the plane radiant temperature distribution in the atrium is used to determine the PPD for the occupied zone. The results show that acceptable thermal environment can be achieved in the summer if outdoor air is allowed to enter through large openings. In winter it is required to allow warm air from adjacent zones to enter the atrium space.

Details

  • Original title: Predicting the thermal and airflow performance of large spaces.
  • Record ID : 1995-1726
  • Languages: English
  • Source: ROOMVENT '94. Air distribution in rooms. Proceedings.
  • Publication date: 1994/06/15
  • Document available for consultation in the library of the IIR headquarters only.

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