Human Body Gaseous Emission

Overview

Engineering reference data for Human Body Gaseous Emission in combustion engineering.

Key Formulas

Heat Release

$Q = \dot{m} \cdot HV$

Fuel energy release rate.

Air-Fuel Ratio

$AF = \frac{m_{air}}{m_{fuel}}$

Mass of air per mass of fuel.

Excess Air

$EA = \frac{O_2}{21 - O_2} \times 100\%$

From flue gas oxygen measurement.

Variables

Symbol	Description	Unit
$Q$	Heat release rate	W
$\dot{m}$	Mass flow rate	kg/s
$HV$	Heating value	J/kg
$AF$	Air-fuel ratio	—

Emission Rates

The following table lists typical gaseous emissions from the human body.

Unit Conversion

For reference, the emission rate unit can be converted as follows:

$1 \text{ g/h} = 1 \times 10^{-3} \text{ kg/h} = 2.2 \times 10^{-3} \text{ lb/h}$

References

• Original Source