Title: The influence of possible definitions of a reference environment to determine the exergy of air in buildings

Authors: P. Sakulpipatsin, H.J. Van Der Kooi, L.C.M. Itard, E.C. Boelman

Addresses: Faculty of Architecture, Building Technology Section, Delft University of Technology, Berlageweg 1, 2628 CR Delft, The Netherlands. ' Faculty of Architecture, Building Technology Section, Delft University of Technology, Berlageweg 1, 2628 CR Delft, The Netherlands. ' OTB Research Institute for Housing, Urban and Mobility Studies, Delft University of Technology, P.O. Box 5030, 2600 GA Delft, The Netherlands. ' Faculty of Architecture, Building Technology Section, Delft University of Technology, Berlageweg 1, 2628 CR Delft, The Netherlands

Abstract: This paper critically analyses the influence of possible definitions of the standard state of air to determine the exergy of air in buildings. Three different contributions are considered related to differences in temperature, pressure, and humidity of air inside and outside the building envelope. The possibility to calculate the exergy of air in buildings, based on only one or two of these contributions, for example expressed by a characteristic air temperature and/or air as dry air, is explored for three different locations on earth. These values are compared to those calculated using hourly statistical climate data during one year.

Keywords: exergy; reference environment; indoor air; air temperature; air pressure; humidity.

DOI: 10.1504/IJEX.2008.018111

International Journal of Exergy, 2008 Vol.5 No.3, pp.275 - 295

Published online: 02 May 2008 *

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