Fire/Arson Investigations : Fire/Arson Investigations
A place to ask questions and add to probative and informative discussions associated with the various aspects of the field of fire investigation. -- FORUM RULES---BE CIVIL AND NO NAME CALLING, NO BELITTLING, NO BERATING, NO DENIGRATING others. Postings in violation of these rules can be removed or editted to remove the offending remarks at the discretion of the moderators and/or site administrator.
Re: Watching Paint Dry: Hypothesis Testing of Ignition Scenarios Involving Spontaneous Heating
Posted by: dcarpenter (IP Logged)
Date: January 21, 2022 10:16AM
The testing referenced in John's presentation is used for the classification of a material for transport. There are three-classifications that are the result of conducting a limited number of tests with specific characteristic lengths (i.e., "pile sizes") and ambient temperatures.
The classification tests are not able to determine if a material can self-heat to thermal runaway under a range of characteristic lengths and ambient temperatures. The characteristic length is coupled to an ambient temperature. Thus, the testing can produce an ignition model that "maps" the characteristic length and the ambient temperature required to produce thermal runaway. A much more intensive testing process than the UN tests.
Douglas J. Carpenter, MScFPE, CFEI, PE, FSFPE
Vice President & Principal Engineer
Combustion Science & Engineering, Inc.
8940 Old Annapolis Road, Suite L
Columbia, MD 21045
(410) 884-3266
(410) 884-3267 (fax)
www.csefire.com
The classification tests are not able to determine if a material can self-heat to thermal runaway under a range of characteristic lengths and ambient temperatures. The characteristic length is coupled to an ambient temperature. Thus, the testing can produce an ignition model that "maps" the characteristic length and the ambient temperature required to produce thermal runaway. A much more intensive testing process than the UN tests.
Douglas J. Carpenter, MScFPE, CFEI, PE, FSFPE
Vice President & Principal Engineer
Combustion Science & Engineering, Inc.
8940 Old Annapolis Road, Suite L
Columbia, MD 21045
(410) 884-3266
(410) 884-3267 (fax)
www.csefire.com
Sorry, only registered users may post in this forum.