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A Review of Energy-Efficient Technologies and Decarbonating Solutions for Process Heat in the Food Industry

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  • François Faraldo

    (Civil and Mechanical Engineering Laboratory, University of Rennes, 35000 Rennes, France
    PackGy, Industrial Deeptech Start-Up, 56700 Kervignac, France)

  • Paul Byrne

    (Civil and Mechanical Engineering Laboratory, University of Rennes, 35000 Rennes, France)

Abstract

Heat is involved in many processes in the food industry: drying, dissolving, centrifugation, extraction, cleaning, washing, and cooling. Heat generation encompasses nearly all processes. This review first presents two representative case studies in order to identify which processes rely on the major energy consumption and greenhouse gas (GHG) emissions. Energy-saving and decarbonating potential solutions are explored through a thorough review of technologies employed in refrigeration, heat generation, waste heat recovery, and thermal energy storage. Information from industrial plants is collected to show their performance under real conditions. The replacement of high-GWP (global warming potential) refrigerants by natural fluids in the refrigeration sector acts to lower GHG emissions. Being the greatest consumers, the heat generation technologies are compared using the levelized cost of heat (LCOH). This analysis shows that absorption heat transformers and high-temperature heat pumps are the most interesting technologies from the economic and decarbonation points of view, while waste heat recovery technologies present the shortest payback periods. In all sectors, energy efficiency improvements on components, storage technologies, polygeneration systems, the concept of smart industry, and the penetration of renewable energy sources appear as valuable pathways.

Suggested Citation

  • François Faraldo & Paul Byrne, 2024. "A Review of Energy-Efficient Technologies and Decarbonating Solutions for Process Heat in the Food Industry," Energies, MDPI, vol. 17(12), pages 1-50, June.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:12:p:3051-:d:1419188
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    References listed on IDEAS

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