Jisel Del Rosario-Santiago, Erick Mario López-Méndez, Héctor Ruiz-Espinosa, Carlos Enrique Ochoa-Velasco, Alejandro Escobedo-Morales, Irving Israel Ruiz-López
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Modelling post-frying oil absorption, water loss, and cooling of potato cylinders
A simultaneous heat and mass transfer model based on global coefficients was proposed to describe the oil absorption, water loss, and temperature changes occurring during the post-frying period of potato cylinders. The model was solved in Matlab® and simultaneously fitted to post-frying kinetics from literature, describing the surface and penetrated surface oil contents, as well as the surface and centre temperatures of potato cylinders at six holding temperatures (25, 100, 120, 140, 160, and 180°C). Besides, simple algorithms were developed to evaluate the oil layer thickness and the minimum oil penetration distance, obtained by assuming the potato cylinder was split into a dry zone, where the oil was absorbed, and a moist zone free from oil. The model achieved a good reproduction of fitted responses with average deviations ranging from 1.9 to 11.7% for all post-frying holding temperatures. Estimated distribution coefficients evidenced higher oil absorption at low holding temperatures, increasing from 0.66 kg surface oil/kg absorbed oil at 25°C to 2.60 kg surface oil/kg absorbed oil at 180°C, while no temperature influence on mass transfer coefficient was found under the explored experimental conditions (p > 0.05). The estimated minimum oil penetration distance (thickness of the dry zone region) after the post-frying stage (229 to 506 µm) showed a good agreement with crust thickness values from literature.
期刊介绍:
The International Food Research Journal (IFRJ) publishes papers in English, six (6) issues a year with the coverage of:
Food Science and Technology
Nutrition and Dietetics
Agriculture, multidisciplinary
Chemistry, multidisciplinary
The scope of the Journal includes:
Food Science, Food Technology and Food Biotechnology
Product Development and Sensory Evaluation
Food Habits, Nutrition, and Health
Food Safety and Quality
Food Chemistry, Food Microbiology, Food Analysis and Testing
Food Engineering
Food Packaging
Food Waste Management
Food Entrepreneur
Food Regulatory
Post-Harvest Food Management
Food Supply Chain Management
Halal Food and Management