Bacharach Gas Pup Instruções de Operação descarregar pdf (Página 52)

BASIC PRINCIPLES OF CALCULATING RESULTS GA-40 T plus

2ref

-reference oxygen - the parameter used to calculate relative concentrations of

components (formula 4). It is a standard quantity. In the table, it has been assumed

that as in DIN standards that it is: 11% - for solid fuels and 3% for gaseous and

liquid ones.

HV - fuel quality - the amount of energy emitted during complete combustion of 1

kilogram (or 1m

in case of gas) of fuel.

6.8 The influence of fuel parameters on the accuracy of result calculations

As has already been mentioned, GA-40 T plusplus does not measure the concentration of carbon dioxide, but

calculates it from the measured oxygen concentration and the CO

2max

parameter. On basis of CO

concentration calculated in this way, the chimney loss, combustion efficiency and loss by incomplete

combustion are calculated. Obviously, the fuel parameters (especially CO

2max

), have a fundamental influence

on calculations of combustion processes. The following results calculated by GA-40 T plusplus are affected by

fuel parameters:

contents - depends on CO

max

chimney loss - depends on CO

max, A1 and B

η and η

- depends on CO

max , A1 and B

IL loss by incomplete combustion - depends on CO

max and α.

As formula

•

shows, the value of the excess air factor is independent of

fuel parameters. The calculated results of gas quantities (except CO

) and the results of

temperature measurements and power quantities do not depend on fuel parameters either.

Please note that fuel quality HV does not appear in any formula. This parameter does not

influence any measurement result shown by GA-40 T plusplus.

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