From Event: SPIE Commercial + Scientific Sensing and Imaging, 2017
Adequate fire protection of distilled spirits stored in oak barrels requires understanding the failure mode of these barrels, including quantifying the leak rate. In this study, the use of a custom-calibrated, long-wave microbolometer camera is demonstrated to seek new protection methods for rack-stored distilled spirits. Individual oak barrels ranging between 200 L and 500 L filled with 75%/25% ethanol/water were exposed to both propane gas fires and pure ethanol pool fires. The IR camera was used to see through the smoke and flames showing the location of the leaks. The increase in HRR due to the leaked content was measured using gas calorimetry of the combustion products. This study showed that barrels leaked at a rate of approximately 4-8 lpm, resulting in heat release rates ranging between 1.2 and 2.4 MW. These numbers are confirmed by the quantitative measurements of gaseous H2O and CO¬2 in the exhaust. Surface temperature of the exposed oak could reach temperatures up to 750ºC.
Jaap de Vries, "Fire testing and infrared thermography of oak barrels filled with distilled spirits (Conference Presentation)," Proc. SPIE 10214, Thermosense: Thermal Infrared Applications XXXIX, 1021403 (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 11, 2017; Published: 13 June 2017); https://doi.org/10.1117/12.2263565.5460552859001.
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