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Raising the Drying Unit for Fruits and Vegetables Energy Efficiency by Application of Thermoelectric Heat Pump

Author

Listed:
  • Dmitry Tikhomirov

    (Federal Scientific Agroengineering Center VIM, 109428 Moscow, Russia)

  • Aleksei Khimenko

    (Federal Scientific Agroengineering Center VIM, 109428 Moscow, Russia)

  • Aleksey Kuzmichev

    (Federal Scientific Agroengineering Center VIM, 109428 Moscow, Russia)

  • Dmitry Budnikov

    (Federal Scientific Agroengineering Center VIM, 109428 Moscow, Russia)

  • Vadim Bolshev

    (Federal Scientific Agroengineering Center VIM, 109428 Moscow, Russia)

Abstract

Drying food stuffs and other materials belongs to one of the most commonly used feedstock processing techniques, featuring rather high energy consumption. The major disadvantage of conventional electric convective-type household dryers is substantial thermal energy emission into the environment with a wet exhaust, worked-out drying agent. Among other principal disadvantages common to all dryers of this type, the following have to be mentioned: spatial inhomogeneity of heating a product under processing and that of drying agent distribution due to its temperature reduction and relative humidity growth as it moves upwards. A block diagram and a breadboard model of a convective-type thermoelectric dryer employing a thermoelectric heat pump have been designed. In our approach, a product is treated with the help of a drying agent (normally, heated air) with partial exhaust-air recirculation and heat recovery. Laboratory studies of the drying process have been carried out using apple fruits as a test material in order to evaluate the power consumed for evaporation of 1 kg of water in the newly developed convective-type thermoelectric drying unit. Physical parameters of apple fruits before and after drying both in the thermoelectric drying unit and in a conventional series-produced convective-type domestic dryer have been reported. The energy efficiency of the newly designed drying unit has been compared with that of some series-produced samples. It has been found out that, unlike conventional convective-type dryers, the breadboard model of the developed thermoelectric drying unit features a smoother product drying process owing to the presence of side air channels and more effective drying agent path organization in the processing chamber. This conclusion was supported by the results of the carried out tests. Application of thermoelectric heat pumps with the function of the exhaust drying agent heat recovery will make it possible to reduce the drying agent heater installed capacity and the power consumed by the newly designed convective-type thermoelectric drying unit by up to 20% in the course of the drying process, compared to series-produced household convective-type dryers.

Suggested Citation

  • Dmitry Tikhomirov & Aleksei Khimenko & Aleksey Kuzmichev & Dmitry Budnikov & Vadim Bolshev, 2024. "Raising the Drying Unit for Fruits and Vegetables Energy Efficiency by Application of Thermoelectric Heat Pump," Agriculture, MDPI, vol. 14(6), pages 1-15, June.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:6:p:922-:d:1412796
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    References listed on IDEAS

    as
    1. Patel, Viral K. & Gluesenkamp, Kyle R. & Goodman, Dakota & Gehl, Anthony, 2018. "Experimental evaluation and thermodynamic system modeling of thermoelectric heat pump clothes dryer," Applied Energy, Elsevier, vol. 217(C), pages 221-232.
    2. Dmitry Tikhomirov & Aleksei Khimenko & Aleksey Kuzmichev & Vadim Bolshev & Gennady Samarin & Ivan Ignatkin, 2023. "Local Heating through the Application of a Thermoelectric Heat Pump for Prenursery Pigs," Agriculture, MDPI, vol. 13(5), pages 1-14, April.
    3. Irshad, Kashif & Habib, Khairul & Thirumalaiswamy, Nagarajan & Saha, Bidyut Baran, 2015. "Performance analysis of a thermoelectric air duct system for energy-efficient buildings," Energy, Elsevier, vol. 91(C), pages 1009-1017.
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