Heat Release Rate Calculator

Calculate heat release rate (HRR) for common fuels based on burning area and heat flux per unit area.

Input Parameters

Results

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Total HRR
kW
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Mass Loss Rate
g/s
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Convective HRR (~70%)
kW
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Radiative HRR (~30%)
kW
Note: Typical HRRPUA values: upholstered furniture 250-500 kW/m², pool fires 600-2000 kW/m², wood cribs 150-300 kW/m². Per SFPE Handbook of Fire Protection Engineering.

Reference

Q = A * q''(dot) [SFPE Handbook Ch. 26] m_dot = Q / (chi * delta_Hc) Q_c ~ 0.70 * Q (convective fraction) Q_r ~ 0.30 * Q (radiative fraction) Where A = burning area, q'' = HRRPUA, chi = combustion efficiency