Thermochemnistry

C02 + H20 —> C6H10O5 + O2

• Energy absoped from light

C6H10O5 + O2 —> CO2 + H20

• Energy released

• Amount of heat released during its combustion

• Lower if the moisture content is higher

• Heat

• Fuel

• Oxygen

• The higher the density the higher the flammability (more air)

Temperature at which wood starts to burn when exposed to a flame (225°C)

Temperature at which wood ignites spontaneously (280°C)

Decomposition of wood with formation of char and gas

• How long can wood hold a certain weight while burning

• Formation of char per time

Smoke is more dangerous than actual fire

• RF1: no contribution to fire

• RF2: little (hardwood)

• RF3: admissable (softwood, OSB)

• RF4: inadmissable

• Formation of char treated with protection agent

• Measurement of materials flammability using oxygen consumption caliometry

• Determine HRR by amount of oxygen the fire consumes

• Smoke measured by light extinction

• Mineralization