ISO 19703:2018 Preview
Generation and analysis of toxic gases in fire -- Calculation of species yields, equivalence ratios and combustion efficiency in experimental fires
This document provides definitions and equations for the calculation of toxic product yields and the fire conditions under which they have been derived in terms of equivalence ratio and combustion efficiency. Sample calculations for practical cases are provided. The methods are intended to be used to produce either instantaneous or averaged values for those experimental fires in which time-resolved data are available.
This document is intended to provide guidance to fire researchers for
— recording appropriate experimental fire data,
— calculating average yields of gases and smoke in fire effluents in fire tests and fire-like combustion in reduced scale apparatus,
— characterizing burning behaviour in experimental fires in terms of equivalence ratio and combustion efficiency using oxygen consumption and product generation data.
This document does not provide guidance on the operating procedure of any particular piece of apparatus or interpretation of data obtained therein (e.g. toxicological significance of results).
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