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Mean Kinetic Temperature
There are some products and materials that exist which have accelerated rates of
degradation at higher temperatures. For example, perishable food items, pharmaceutical
products and many forms of bacteria can grow/degrade exponentially as the
environmental temperature increases. Mean kinetic temperature is a calculation that
accommodates the non-linear thermal effect temperature can have on products. Mean
kinetic temperature is represented as the equivalent temperature the product was
thermally subjected to during the period of time the various temperature reading were
recorded.
Mathematically the formula for calculating the mean kinetic temperature can expressed as
illustrated in the following picture:
Where:
mkt Mean kinetic temperature, in degrees Celsius
the activation energy. LogTag Analyzer uses an
activation energy value of 83.144 KJ/mol for the
calculation.
R the universal gas constant, which is 0.0083144 KJ/mol K
n the number of data points to include in the calculation
t
i
a data point to include in the calculation, in degrees
Celsius
For example, if there were 5 data points to calculate the mean kinetic temperature of and
they were, 12.3, 15.9, 16.2, 14.7 and 14.9 degrees Celsius, then the mean kinetic
temperature would be 14.9 degrees Celsius.