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The effect of the urban environment on the infiltration component of the building heat balance.

Number: pap. 369

Author(s) : BROCKLEHURST A. F., BARLOW J. F., HALIOS C., et al.

Summary

The urban climate has an altering effect on the living conditions of its human inhabitants. Predicting the energy demand arising from the need to alter an indoor climate to a desired level of comfort requires an accurate building heat balance simulation. Components of this heat balance are affected by the building’s micrometeorology. Infiltration is defined as the unintentional flow of air from outdoors directly into a building. This component of the indoor heat balance is directly influenced by the pressure forces exerted on the building exterior by wind therefore understanding the wind profiles around a building is crucial to modelling infiltration. Many heat balance simulations within building energy models assume a power law or logarithmic wind profile around a building which does not vary with wind direction but these assumptions may not be valid in an urban environment. Experimental work is presented in which infiltration rates were measured via two different methods in a single thermal zone within a building in central London simultaneously to indoor temperature and local meteorological measurements via a rooftop mast. Full scale data sets such as this are crucial for model validation and results are compared here to simplistic modelling approaches.

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Pages: 9 p.

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Details

  • Original title: The effect of the urban environment on the infiltration component of the building heat balance.
  • Record ID : 30008908
  • Languages: English
  • Source: Clima 2013. 11th REHVA World Congress and 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings.
  • Publication date: 2013/06/16

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