Liquefied Natural Gas Lng

Reference data and engineering information about liquefied natural gas lng for combustion applications.

liquefiednaturalgaslng

Overview

Engineering reference data for Liquefied Natural Gas Lng 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	—

LNG (Liquefied Natural Gas) is produced by cooling natural gas to -161°C (-258°F) at atmospheric pressure. Prior to liquefaction, impurities and heavy hydrocarbons are removed, leaving a liquid that is primarily composed of methane.

Key Characteristics

Density: LNG density ranges from 410 kg/m³ to 500 kg/m³.
Volume Reduction: The volume of LNG is approximately *1/600 of the volume of natural gas at standard atmospheric conditions (e.g., 15°C and 1 atm).

References

Original Source

Source: engineeringtoolbox.com