Standard Test Method for Estimation of Net Heat of Combustion of Aviation Fuels

Importancia y uso:

5.1 This test method is intended for use as a guide in cases where experimental determination of heat of combustion is not available and cannot be made conveniently and where an estimate is considered satisfactory. It is not intended as a substitute for experimental measurements of heat of combustion. Table 1 shows a summary for the range of each variable used in developing the correlation. The mean value and an estimate of its distribution about the mean, namely the standard deviation, is shown. This indicates, for example, that the mean density for all fuels used in developing the correlation was 779.3 kg/m³ and that two thirds of the samples had a density between 721.4 kg/m³ and 837.1 kg/m³, that is, plus or minus one standard deviation. The correlation is most accurate when the values of the variables used are within one standard deviation of the mean, but is useful up to two standard deviations of the mean. The use of this correlation may be applicable to other hydrocarbon distillates and pure hydrocarbons; however, only limited data on non-aviation fuels over the entire range of the variables were included in the correlation.

Note 4: The procedures for the experimental determination of the gross and net heats of combustion are described in Test Methods D240 and D4809.

5.2 The calorimetric methods cited in Note 4 measure gross heat of combustion. However, net heat is used in aircraft calculations because all combustion products are in the gaseous state. This calculation method is based on net heat, but a correction is required for condensed sulfur compounds.

Subcomité:

D02.05

Referida por:

D6615-25

Volúmen:

05.01

Número ICS:

75.160.20 (Liquid fuels)

Palabras clave:

aviation fuel; gross heat of combustion; heat energy; heat of combustion; heating tests; net heat of combustion;