Weedar Watthanachur. Simulation of Nutrients Loss during Conduction Heating of Canned Food. Master's Degree(Food Engineering). King Mongkut's University of Technology Thonburi. KMUTT Library.. : King Mongkut's University of Technology Thonburi, 2552-12-29.
Simulation of Nutrients Loss during Conduction Heating of Canned Food
Abstract:
Alternating Direction Implicit (ADI) finite difference scheme based on Fourier's heat
conduction equation in combination with the rate of nutrients loss and spore degradation
was developed to determine the temperature history and nutrients loss of canned food
during sterilization. Seven constant retort temperatures were used to study the effect of
boundary temperature on the level of thiamin retention in canned peas at the same
lethality value. The effects of can size (300x108, 300x213, 307x201, 307x403,
401 x200), equal diagonal line can and equal volume can on the thiamin retention were
also investigated. It was found that the optimum retort temperature for thiamine retention
in canned pea was 119?C. The higher ratio of volume to surface area led to less thiamin
retention. Thiamine retention was not directly related to the diagonal line and volume but
it strongly depended on the can shape. Flat disk and long cylinder cans led to higher
thiamine retention than a typical can. Additionally, the model was used to optimize the
condition of food sterilization process in order to maximize the level of vitamins A, C,
B1, B6, pentatonic acid, green and red pigments in canned peas, tomato puree and sieved
peas with carrots in a 300x I08 can. The simulation results showed that the optimum
process temperatures for canned peas, tomato purees and sieved peas with carrots were
140, 104 and 140?C, respectively.