Heat yield

n. Net caloric content of wildland fuel after reductions for moisture content and water of reaction.

 

  • Discussion

 

Byram (1959) calculated heat yield as the high heat of combustion minus losses resulting from radiation, incomplete combustion, water of reaction, and fuel moisture. A standard value of 1263 kJ/kg of fuel is assumed for estimating the heat loss associated with the latent heat of vaporization of the water of reaction of wildland fuels (Byram 1959).

 

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Radiation is arguably not a loss of heat at all and should not be removed from high heat of combustion. Losses due to incomplete combustion are variable and difficult to measure (Alexander 1982).