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Room average velocity equation - a tool to improve design of thermal comfort condiitons

Hagström K, Hakkola O, Moilanen T, 2002
air diffusion | thermal comfort | mathematical modelling
Bibliographic info: Proceedings of Indoor Air 2002 (9th International Conference on Indoor Air Quality and Climate) - June 30 - July 5, 2002 - Monterey, California - vol 3, pp 760-764, 6 figs, 9 refs
Languages: English

For a long time PPD index defined in international ISO7730 standard has been a practical tool for evaluation of measured thermal comfort conditions in existing buildings. However, its usage has not yet been realized in design phase. One of the reasons is that there has not been any practical tool available to estimate average velocity conditions within the occupied zone. A kinetic energy model for calculation of the average room velocity has been presented in earlier paper. Current paper reports additional verification results of the kinetic energy model with different types of diffusers. The verified kinetic energy method has been applied together with other appropriate theories in development of design procedure and a software tool for designing of thermal comfort conditions according to ISO7730. Additionally, the design tool enables designer to evaluate maximum draft velocity conditions from the supply jet.


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