Human Body Gaseous Emission

Reference data and engineering information about human body gaseous emission for combustion applications.

humanbodygaseousemission

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.

9 rows

Typical hourly gaseous emissions from a human body.
Gaseous Emission(-)	Emission Rate(g/h)
Acetaldehyde	3.5×10⁻⁸
Acetone	4.8×10⁻⁷
Ammonia	1.6×10⁻⁵
Carbon dioxide	3.2×10⁻²
Carbon monoxide	1×10⁻⁵
Hydrogen sulfide	1.5×10⁻⁸
Methane	1.7×10⁻⁶
Methanol	6×10⁻⁹
Toluene	2.3×10⁻⁸

Source: engineeringtoolbox.com

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

Source: engineeringtoolbox.com