Estimating Cooling Process Lethality for Different Cooling j Values.

Cooling lethalities were determined using Ball's formula method and other lethality evaluation equations for fc from 10-120 min, jc of 0.25-2.21, L/D geometry values of 0.25-2.0, and the difference between final heating and cooling temperatures of 72.2-111.1°C. For jc < 1.35 the Ball method overestimated the cooling lethality (>42% for jc = 1). For fc of 35-130 min and jc > 0.7, all but one of the models that account for variable jc were conservative in estimating cooling lethality and underestimated lethality as jc increased above 1.41. The proposed modified hyperbolic function estimated conservative cooling lethalities over the entire range of c and jc values studied and was 60% more accurate in estimating actual lethality than the next best conservative method at jc = 2.0. [ABSTRACT FROM AUTHOR]