Oxygen Consumption Calorimetric Method is generally used for measuring heat release rate (HRR) of combustible items. However, this method might have an uncertain result for gas concentration in case of during water discharged such as sprinkler.
In this study, we tried to find out an appropriate and simple method for measuring HRR during water discharged. A relation between HRR in free burning condition, which was calculated by mass loss rate, and radiative heat flux was obtained experimentally. The Mie theory was applied to estimate a radiative attenuation by the absorption of water droplet, because the radiative heat flux during water discharged needs to take it into account. As a result, the radiative attenuation calculated by the theory was verified by experimental data.
