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CALCULATION OF TEMPERATURE MEASUREMENT ERRORS IN THERMOCOUPLES IN CONVECTION HEATING CANS
Author(s) -
PACKER G. J. K.,
GAMLEN J. L. B.
Publication year - 1974
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1974.tb17969.x
Subject(s) - dimensionless quantity , retort , thermal conduction , mechanics , thermocouple , thermodynamics , heat transfer , convection , materials science , observational error , heat transfer coefficient , chemistry , mathematics , physics , composite material , statistics , organic chemistry
ABSTRACTS Heat conduction along a wire and heat transfer to a wire from liquid in a can during heating and cooling in a retort are considered. Equations are derived for calculation of the temperature error, which is expressed as a fraction of the difference between the liquid and retort temperatures. Dimensionless numbers are defined for heat conduction along the wire and for heat transfer from the liquid to the wire. Graphs of temperature error are presented in terms of these dimensionless numbers which enable the reader to rapidly determine the error for several points along the wire. A method is also given for correction of the “lag factor” (j)in process calculations.