ML Consultancy Hyderabad

No-Overpressure Vent Area Formula (External Heating) Calculator

Constant External Heat Input (Qₜ) [kJ/min]:

Initial Mass (m₀) [kg]:

Specific Volume of Liquid (vₓₐ) [m³/kg]:

Mass Flux (G) [kg/m²s]:

Volume (V) [m³]:

Latent Heat of Vaporization (hₓₐ) [kJ/kg]:

Note:

The No-Overpressure Vent Area Formula is used to calculate the required vent area to prevent excessive pressure buildup due to external heating.

Explanation of Parameters:

Qₜ: The external heat energy applied to the system (measured in kJ/min).
m₀: The initial mass of the liquid present in the vessel (kg).
vₓₐ: The specific volume of the liquid in m³/kg.
G: The mass flux, representing the rate of mass movement per unit area (kg/m²s).
V: The total volume of the container (m³).
hₓₐ: The latent heat required to vaporize the liquid (kJ/kg).

Real-Life Applications:

Used in designing emergency venting systems in chemical plants.
Ensures fire safety compliance in storage tanks containing volatile substances.
Prevents boiling liquid expanding vapor explosion (BLEVE) scenarios.

Conclusion:

This formula is crucial for safety and fire protection engineers to ensure that equipment and storage vessels do not rupture under excessive pressure due to heat exposure.