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ISO 19703:2018 Generation and analysis of toxic gases in fire - Calculation of species yields, equivalence ratios and combustion efficiency in experimental fires >
ISO 19703:2018 Generation and analysis of toxic gases in fire - Calculation of species yields, equivalence ratios and combustion efficiency in experimental fires, 2018
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols and units
- 5 Appropriate input data required for calculations
- 5.1 Data handling
- 5.1.1 Uncertainty
- 5.1.2 Significant figures and rounding off
- 5.2 Test specimen information
- 5.2.1 Composition
- 5.2.2 Net heat of combustion
- 5.3 Fire conditions
- 5.3.1 Apparatus
- 5.3.2 Set-up procedure
- 5.4 Data collection
- 5.4.1 Data acquisition
- 5.4.2 Measured data and observations
- 6 Calculation of yields of fire gases and smoke, stoichiometric oxygen-to-fuel mass ratio and recovery of key elements
- 6.1 Calculation of measured yields from fire gas concentration data
- 6.2 Calculation of notional gas yields
- 6.2.1 General
- 6.2.2 From the elemental composition
- 6.2.3 From the empirical formula
- 6.3 Calculation of recovery of elements in key products
- 6.4 Calculation of stoichiometric oxygen-to-fuel mass ratio
- 6.4.1 General
- 6.4.2 From the chemical equation for complete combustion
- 6.4.3 From the net heat of combustion, ΔHc
- 6.4.4 From the carbon content of the material
- 6.5 Calculation of smoke yields
- 6.5.1 General
- 6.5.2 Smoke yields based on mass of smoke particulates
- 6.5.3 Smoke yields based on light obscuring properties
- 6.5.4 Relationship between mass measurement and light obscuration
- 7 Calculation of equivalence ratio
- 7.1 General
- 7.2 Derivation of ϕ for flow-through, steady-state experimental systems
- 7.3 Derivation of ϕ for flow-through, calorimeter experimental systems
- 7.4 Derivation of ϕ for closed chamber systems
- 7.5 Derivation of ϕ in room fire tests
- 8 Calculation of combustion efficiency
- 8.1 General
- 8.2 Heat release efficiency
- 8.3 Oxygen consumption efficiency
- 8.3.1 General
- 8.3.2 Oxygen depletion method
- 8.3.3 Oxygen-in-products method
- 8.4 Oxides of carbon method
- Bibliography [Go to Page]