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Optimizing working conditions of air blast freezers in seafood processing factories

Author(s): Minh Tuan Hoanga, Xuan Vinh Hab, Chi Chinh Vocd, Thanh Van Nguyen d, Thi Thuy Tien Nguyene

a Faculty of Thermal - Refrigeration and Construction, Hue Industrial College, Hue, Vietnam
b Faculty of Electronic, Hue Industrial College, Hue, Vietnam
c Department of Scientific Research and International Cooperation, Danang University of Science and Technology, Da Nang, Vietnam
d Faculty of Thermal and Refrigeration Engineering, Danang University of Science and Technology, Da Nang, Vietnam
e Faculty of Engineering and Technology, College of Agriculture and Forestry, Hue University, Hue, Vietnam
International Journal of Smart Grid and Clean Energy, vol. 8, no. 3, May 2019: pp. 354-360
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.8.3.354-360
Abstract: At present, there are more than 633 seafood processing companies in Vietnam that consume 19.2% of the country’s total industrial electrical power. The most popular freezers in these factories are air blast types. They are the most energy-consuming equipment, accounting for more than 50% of a company’s total energy usage. Two key variables affecting the energy consumption of the freezers are freezing time and freezing temperature. In this study, a mathematical model was designed to determine the freezing time for food products and the refrigeration load of air blast freezers. It is presented as an objective function of total energy consumption for a given processing time. In addition, optimal freezing temperature, air velocity, and freezer efficiency were also determined. Our model can be used to operate air blast freezers with highest efficiency.
Keywords: Air blast freezer, frozen seafood, energy consumption, two-stage system of refrigeration.
Full Paper.pdf

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