ANALYSIS METHODS FOR NATURAL AND HYBRID VENTILATIO

Annex 35 is an International Energy Agency(IEA) task-sharing project which commenced on 1 August 1998 for a duration of four years, and in which fifteen countries participate. The objectives of Annex 35 are to promote energy-and cost-effective hybrid ventilation systems and develop control strategies and performance analysis methods for office and educational buildings . This paper presents a critical literature review of the key available mathematical analysis methods that are applicable to natural and hybrid ventilation. It includes a review of some significant issues and areas of further development ,including applicability to dirrerent design stages, large openings ,input data requirement , application of analysis methods to hybrid ventilation ,deterministic versus stochastic ,integration with thermal modelling ,evaluation of analysis methods ,and development of methods for opening sizing .Planned work in the area of analysis methods in Annex 35is summarised.