Heat Penetration Studies of the retort of sterilizer are conducted by using distributed temperature measuring sensors or wireless datalogger to determine the heating & cooling characteristics of a product or package in a retort system for the establishment of a safe & optimum thermal process to deliver a sterile product.
General or Ball Formula Method:
a. Calculation of heating rate factor, the slope of the heating curve, fh
b. Calculation of value of dimensionless lag factor, jch
c. Calculation of Total process time, B = fh [log (jch·Ih) – log g],
d. Calculation of process time, Pt = B – 0.42 CUT
e. Calculation of Ball process Lethality, Fo = fh/[(fh/U) x Fi]
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