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Title: Specific heat capacity of wildland foliar fuels to 434 °C

Source: Fuel

Author(s)Boardman, Charles R.; Dietenberger, Mark A.; Weise, David R.

Publication Year: 2021  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4716-3A

Abstract: Specific heat capacity of eleven live foliar fuels from the southeastern United States was measured to 434 ◦C using differential scanning calorimetry to improve the modeling of prescribed fire behavior. Techniques which allow measurement of the standard heat capacity, excluding the effects of heat of reaction, were refined. Specific heat of leaves increased with temperature until the onset of pyrolysis. Once pyrolysis began, the specific heat became nearly constant. We present a simple model, suitable for incorporation in computer simulations, which captures this functional shape. This model approach could be applied to other foliar fuels if the chemical composition is known. Measurement of standard heat capacity was used to estimate effective heat of reaction given the measurements of total heat flow which included heat of reaction. For all foliar fuels studied, effective heat of reaction was found to be mildly exothermic between 220 and 350 ◦C.

Keywords: Heat capacity; Fire modeling; Pyrolysis; Differential scanning calorimetry; Thermal analysis; Foliar fuels

Publication Review Process: Formally Refereed

File size: 3,072 kb(s)

Date posted: 04/29/2021

This publication is also viewable on Treesearch:  view
RITS Product ID: 10156
Current FPL Scientist associated with this product
Dietenberger, Mark A.
Research General Engineer
  

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