Gas Vent Terminations Roof

Overview

Engineering reference data for Gas Vent Terminations Roof 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	—

Vent Termination Clearance Data

The required clearance between gas vent terminations and the roof surface increases with steeper roof slopes to ensure proper venting and safety. This table provides the clearance specifications based on roof slope and corresponding degrees.

Interactive Charts

References

• Original Source