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Numerical study on the influence of a ceiling height for displacement ventilation.

Author(s) : HASHIMOTO Y., YONEDA H.

Summary

This study analyses vertical temperature profiles for displacement ventilation depending on a ceiling height of an small office room. It's purpose is to investigate the influence of the ceiling height on thermal comfort of the occupants. Numerical simulations are carried out for a modelled room which dimensions are 5.3 by 5.44 by 2.5, 3 and 3.5 m ceiling height. A finite volume method is used for solving the governing equations and low Reynolds number k-E model is applied as a turbulent model. A heat source is installed at the centre of the modelled room and lighting load is given on the ceiling. The surface temperature of the ceiling-mounted lighting fixtures is given as a boundary condition by measuring surface temperature of fluorescent lamps using a thermograph. Normalised vertical temperature profiles are compared for each ceiling height room. Numerical results are compared to experimental results for 2.5 m ceiling height room. As a result, thermal comfort is surveyed for different ceiling height rooms for displacement ventilation.

Details

  • Original title: Numerical study on the influence of a ceiling height for displacement ventilation.
  • Record ID : 2010-1598
  • Languages: English
  • Publication date: 2009/07/27
  • Source: Source: Build. Simul. 2009, Glasgow
    pp. 1045-1052; fig.; photogr.; tabl.; 8 ref.

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