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Term of the week:

Heat release rate (HRR)

the rate at which heat is generated by fire. The HRR can be viewed as the engine driving the fire. This tends to occur in a positive-feedback way: heat makes more heat. HRR is measured in Joules per second (also called Watts). Since a fire puts out much more than 1 Watt, HRR is usually quantified in kilowatts (1000 W) or megawatts (a million watts).

For more information on this term, see the interFIRE VR Resource File article: “Heat Release Rate: A Brief Primer” by Dr. Vytenis Babrauskas

 
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