Fire Dynamics 311 W2 Discussion

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American Public University *

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FSMT 362

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Mechanical Engineering

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Feb 20, 2024

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Fire Dynamics 311 W2 Discussion Heat Release Rate 1. Define heat release rate. Heat Release Rate can be described as power of the fire. In other words, it is the rate upon which energy is released from fire. 2. Discuss the importance for the fire service professional to understand and recognize heat release rates and its measurement. Understanding the Heat Release Rate is important for the fire service professional because it assists us in determining and verbalizing the complexity of fires. Knowing the heat release rates for known items in a structure fire can drastically help fire service members estimate potential fire growth and temperatures inside of the building. Knowing the potential heat release rate of a mattress warehouse can help determine a safe plan of action according to the complexity and rapid growth of such fire. 3. Discuss two ways heat release rate is measured. Oxygen consumption calorimetry is the most common way to measure Heat Release Rate. It works based on the understanding that most gases, liquids, and solids release a constant amount of energy for each unit mass of oxygen consumed. The second method of measuring Heat Release Rate is to measure the mass loss rate, also known as the burning rate. This can be accomplished by weighing the fuel package as it is burning using a load cell. 4. What did you find from your research and the readings to be the most interesting aspect of the heat release rate? I found the Heat Release Rates of Burning Items in Fires to be very interesting and useful information in the week 2 reading section. There was data available for heat release rate vs. time for many items such as plastics, cribs, furniture, mattresses, pillows, and Christmas trees. This information can be useful for conducting pre fire plans as well as determining potential fire growth and interior temperatures before making entry. v/r Brandon Monte References: Lilley, Hyeong-Jin Kim and David G., et al. “Heat Release Rates of Burning Items in
Fires.” Journal of Propulsion and Power , 23 May 2012, https://arc.aiaa.org/doi/10.2514/2.6011.
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