Fire Dynamics Tools | Ch. 2 | Eq. 2.1

Hot Gas Temperature Increase (MQH Method)

Calculates the hot gas temperature increase for naturally ventilated enclosures using the MQH correlation.

Reference

Fire Dynamics Tools (FDTs): Quantitative Fire Hazard Analysis Methods for the U.S. Nuclear Regulatory Commission Fire Protection Inspection Program. NUREG-1805.

Equations

\Delta T_g = 6.85 \cdot \left( \frac{Q^{2}}{\left(\sum_{i} A_v \cdot \sqrt{H_v}\right) \cdot (A_t \cdot h_k)} \right)^{1/3}

Inputs

Heat release rate ( Q ) — kW

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Total interior surface area ( A_t ) — m^2

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Heat transfer coefficient ( h_k ) — kW/(m^2 \cdot K)

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Ventilation Openings

Ventilation Openings 1

Opening Name ( Name )

Ventilation opening area ( A_v ) — m^2

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Ventilation opening height ( H_v ) — m

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