McEvoy M, Southall R
Year:
2001
Bibliographic info:
22nd AIVC Conference "Market Opportunities for Advanced Ventilation Technology", Bath, UK, 11-14 September 2001

This paper is an overview of the work carried out during a 3year EPSRC funded project investigating the important factors in Supply Air window design. The structure and some of the main conclusions of this work are presented here. The project consisted of alternating experimental and simulation phases; the experimental results contributed to the model validation, and the simulation outputs provided design guidance for the following experiments. The project has shown that the window can reliably produce U-Values in the order of 0.45 W/m 2 K under semi-laboratory conditions, that the ventilation pre-heat attained was between 10 and 15% of the ventilation heat load at night, and 40 to 70% on sunny south facing facades. This was achieved with a glazing configuration optimised for thermal insulation. Both Computational Fluid Dynamics (CFD) and thermal mass network simulations have proved excellent at predicting window performance. This work has been preparatory to an EU funded project into a complete low energy ventilation system which couples the supply air windows with pressure controlled vents, and a Passive Stack Ventilation (PSV) system. The methodology of the project will be described and the main objectives discussed.