Abstract

The dairy industry needs new and more energy-efficient technological procedure for milk pasteurization. This article introduces a comparative efficiency assessment of various milk pasteurization technologies and electrotechnological means.
The study featured milk, which was heated from 20 to 75°C with a capacity of 1000 kg/h at an estimated power of 58.95 kW. The treatment involved a steam-to-milk pasteurizer with electric indirect or direct heating, an induction pasteurizer, and a thermosiphon pasteurizer with direct or indirect electric heating. The study relied on the methods of energy and exergy analyses.
The system of steam-to-milk pasteurizer with electric indirect (elemental, induction) or direct (electrode) heating demonstrated the following indicators: exergy loss – 1.29 kW, power consumption – 71.29 kW, exergy efficiency – 0.99, energy efficiency – 0.827. The thermosiphon pasteurizer with direct or indirect electric heating demonstrated the following properties: exergy loss – 1.29 kW, power consumption – 60.92 kW, exergy efficiency – 0.99, energy efficiency – 0.9676. The induction pasteurizer had the least competitive parameters: exergy loss – 10.8 kW, power consumption – 70.43 kW, exergy efficiency – 0.867, energy efficiency – 0.837.
The thermosiphon pasteurizer with direct or indirect electric heating was able to increase the energy efficiency of milk pasteurization, while the induction pasteurizer proved to be a promising R&D direction.

Keywords

Pasteurization, dairy products, exergy efficiency, energy efficiency, electrotechnology, direct heating, indirect heating, induction heating, thermodynamic properties

Contribution

A.A. Bagaev developed the research concept and methodology, set up the goal, formulated the conclusions and prospects, analyzed the data, provided scientific counselling, performed 2/3 of the analytical research, and proofread the manuscript. S.O. Bobrovskiy reviewed the literary sources, performed 1/3 of the analytical research, and proofread the article.

CONFLICTS OF INTEREST

The authors declare that there is no conflict of interests regarding the publication of this article.

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