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Spontaneous heating and ignition in stored palm kernels. III.—Steady‐state temperature distribution in a uniform mass of material subject to atmospheric oxidation: A uni‐dimensional treatment
Author(s) -
Burgoyne J. H.,
Thomas A.
Publication year - 1951
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740020104
Subject(s) - ignition system , thermodynamics , convection , thermal conduction , chemistry , steady state (chemistry) , oxygen , mechanics , materials science , physics , organic chemistry
On the basis of previously measured rates, rate‐temperature coefficient and heat of the reaction between oxygen and palm‐kernel fat, the steady‐state temperature distribution in uniform columns of palm kernels due to atmospheric oxidation is determined theoretically using a uni‐dimensional model. Temperature rise may be controlled by three factors; (i) conduction loss, (ii) oxygen deficiency and (iii) convection loss. In practice (i) and (ii) or (i) and (iii) usually operate together; however, they may be considered separately in order to define the lengths of column, external temperatures and ventilation rates at which the column is certainly safe from spontaneous ignition; but the margin of safety cannot be determined by this simplified method.