File:Fse-ignition-source-v3.svg

Fse-ignition-source-v3.svg (SVG file, nominally 900 × 600 pixels, file size: 6 KB)

Summary

Self-heating can create an internal ignition source. Based on Gray (2002), pp. 2-211–2-212.

Diagram for the article Ignition source (Fire Safety Academy wiki, level 1 Basic).

Source basis: Gray (2002), pp. 2-211–2-212
Alt text: Heat generated inside a body exceeds losses and produces internal runaway.

New drawing by Fire Safety Academy. © Fire Safety Academy.

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	Date/Time	Dimensions	User	Comment
current	15:49, 2 November 2026	900 × 600 (6 KB)	Sanne (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity
	08:52, 2 November 2026	900 × 600 (6 KB)	Sanne (talk \| contribs)	Add modest Fire Safety Academy logo-icon watermark
	08:14, 2 November 2026	900 × 600 (4 KB)	Sanne (talk \| contribs)	Upload fse-ignition-source-v3.svg: diagram for Ignition source (level-1 visual plan V3)

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Short title	Heat generated inside a body exceeds losses and produces internal runaway.
Image title	Two porous bodies of the same size. Left, subcritical: internal chemical heat generation is balanced by heat loss from the surface and the body stays only mildly warm. Right, thermal runaway: generation exceeds the surface losses and a hot centre develops inside the body, not at its surface.
Width	900
Height	600