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CFD Investigation of Non‐Condensable Gases in Vacuum and Non‐Vacuum Steam Sterilizers
Author(s) -
Feurhuber Manuel,
Magno Marino,
Miranda Marco,
Prieler René,
Hochenauer Christoph
Publication year - 2019
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201800088
Subject(s) - sterilization (economics) , thermocouple , nuclear engineering , materials science , heat transfer , process engineering , environmental science , thermodynamics , engineering , physics , composite material , monetary economics , economics , foreign exchange market , foreign exchange
Steam sterilization processes rely on high heat transfer rates from the steam to the medical devices. To guarantee this, all non‐condensable gases (NCGs) must be removed from the steam sterilizer before sterilization. The ratios and distribution of the NCGs in the pre‐sterilization phases of both a vacuum and a non‐vacuum steam sterilizer are investigated. Two CFD models for simulation of the NCGs in the sterilizers were developed and validated by the measurements of a pressure sensor and eight thermocouples inside the steam sterilizer. Furthermore, a novel method was developed to calculate the real ratio of NCGs based on the standard measurement (EN 13060). The results show that the NCGs ratio defined in the EN 13060 did not accurately represent the real ratios of the NCGs.