Technical Note TN 7/92 Ventilation heat loss in factories and warehouses

Publication Year

1992

Document Status

Withdrawn

Abstract

Describes the design and construction of a mobile test facility for measuring the air leakage characteristics of a large single cell factory and warehouse units. The facility can pressurise buildings up to and beyond 20,000m³, depending on their air leakage characteristics. Twelve factory units of various construction types have been tested and the ventilation rate has been predicted for all of the factories using a BSRIA air infiltration calculation model. The air infiltration rates were calculated for mean wind speeds at three wind directions and for a temperature difference of 10°C. The results of the air infiltration rates were further processed to provide the ventilation heat loss of each unit based on a normal five day working week and the results were compared with the CIBSE guidance data and with what are considered to be easily achievable reductions in the ventilation of these buildings by careful attention to sealing the structures where air leakage paths through the structure are reasonably identifiable. States the main conclusion from the research is that the CIBSE ventilation allowances are lower than those being realised in practice and that there is considerable scope for energy conservation by better sealing of these types of structures.

ISBN

9780860222965

Publisher Information