SFPE Engineering Guide on Fire Exposures to Structural Elements
By The SFPE Task Group on Fire Exposures to Structural Elements

Glossary

Nomenclature Used in the Enclosure Fires Section

A
Surface area of interior of enclosure (m 2)
A f
Surface area of fuel (m 2)
A floor
Surface area of floor (m 2)
A o
Area of ventilation opening (m 2)
b
Stick width (m)
b p
Factor (-)
C
Wood constant (g/m 1.5-s)
c
Specific heat of enclosure lining (J/kg-K)
c p
Specific heat of air (J/kg-K)
D
Depth of compartment (m)
F
View factor (-) or opening factor (m )
G
Gravitational constant (9.81 m/s 2)
h
Equivalent conductance (W/m 2-K)
h c
Convection coefficient (W/m 2-K)
h k
Conduction coefficient (W/m 2-K)
h r
Radiation coefficient (W/m 2-K)
H
Height of compartment (m)
H o
Height of ventilation opening (m)
k
Thermal conductivity of enclosure lining (W/m-K)
k o
Coefficient (-)
L
Latent heat of vaporization (kJ/g)
m f
Mass of fuel (kg)
Mass burning rate of fuel (kg/s)
m ? f
Mass of fuel per unit area (kg/m 2)
Mass burning rate of fuel per unit area (kg/m 2-s)
Free burning mass loss rate of fuel per unit area (kg/m 2-s)
Asymptotic mass loss rate of fuel per unit area (kg/m 2-s)
Mass flow rate of air (kg/s)
p
Pressure (Pa)
q
Fuel load density (Mcal/m 2)
Heat loss rate (kW)
Heat loss through walls (kW)
Heat flux from fire (kW/m 2)
q E
Effective heat flux (W/m 2
Copyright Society of Fire Protection Engineers 2004 under license agreement with Books24x7
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