Influence of rotational speed on the statistical variability of heat penetration parameters and on the non uniformity of lethality in retort processing

摘要

In a case study on white beans, the e ect of rotation on the statistical variability of heat penetration parameters and on the nonuniformityof lethality in industrial-scale retort processing was investigated. In addition, the in¯uence of process time on the nonuniformityof lethality was evaluated. No clear relation between the non-uniformity of the heating parameters and the rotationalspeed was observed. Rotation seemed to in¯uence process lethality variability throughout the retort by its e ect on non-uniformityin heating characteristics and in retort temperature. Absolute non-uniformity (i.e. standard deviation) increased with increasingholding time, whereas relative non-uniformity (i.e. coe cient of variation) decreased as holding time increases