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Document ID (ISN)111352
CIS number 11-0110
Year 2008
Convention or series no. HSE Research Report RR630
Author(s) Ivings M.J., Clarke M.S., Gant S.E., Fletcher B., Heather A., Pocock D.J., Pritchard D.K., Santon R., Saunders C.J.
Health and Safety Executive
Title Area classification for secondary releases from low pressure natural gas systems
Bibliographic information HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 2WA, United Kingdom, 2008. viii, 182p. Illus. 26 ref.
Internet access Report_RR630.pdf [in English]
Abstract This report reviews current methods of evaluating the effectiveness of the ventilation of enclosures. British Standard BS 5925 which describes a method for calculating air change rates was applied to two enclosures where the air change rate was measured experimentally. In the first of the two cases considered, the calculated air change rate was in good agreement with the measurements, whereas in the other case it under-predicted the ventilation rate. An improved model was proposed and validated against 29 experimental tests carried out in a purpose built enclosure. The experimental tests consisted of releases of simulated methane gas for a range of leak rates and ventilation rates. Findings are discussed.
Descriptors (primary) United Kingdom; air movement; gaseous effluents; mathematical models; ventilation systems
Descriptors (secondary) natural gas; premises; research; gas distribution; leakage; report
Document type E - Books, reports, proceedings
Country / State or ProvinceUnited Kingdom
Subject(s) Fire and explosions
Heating, ventilation and climate
Broad subject area(s) Fires, explosions and major hazards
Browse category(ies) Ventilation