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Experimental Assessment of the Thermal Performance of a Heat Pump Dryer System Based on the Variations in Compressor Discharge Pressure on Oregano Drying

Author

Listed:
  • Arley Salazar-Hincapié

    (Facultad de Ingeniería, Institución Universitaria Pascual Bravo, Medellín 050041, Colombia)

  • Alvaro Delgado-Mejía

    (Facultad de Ingeniería, Institución Universitaria Pascual Bravo, Medellín 050041, Colombia)

  • Andrés Felipe Romero-Maya

    (Facultad de Ingeniería, Institución Universitaria Pascual Bravo, Medellín 050041, Colombia)

  • Eduardo Duque-Grisales

    (Facultad de Ingeniería, Institución Universitaria Pascual Bravo, Medellín 050041, Colombia)

Abstract

The current study shows an empirical analysis to establish the effects of the variations in compressor discharge pressure on the drying performance of aromatic herbs, in terms of the coefficient of performance (CoP), moisture content (MC), specific moisture extraction rate (SMER), drying temperature, drying time and energy consumption. In conducting the research, a heat pump drying system was utilized as a mechanism for dehydrating herbs, seeds, and fruits. It was used thanks to its benefits like higher efficiency and its low power consumption. Three levels of discharge pressure were considered, 1380 kPa, 1100 kPa, and 827 kPa, using 1,1,1,2-tetrafluoroethane (R134a) as a refrigerant and oregano leaves as the main product. The findings show that, concerning the same oregano moisture sample, the lower the compressor discharge pressure, the lower drying temperature, also, the higher drying time was obtained. Despite the fact that the CoP decreased with the compressor discharge pressure, in comparison with the baseline case, it remained essentially the same for the other two cases.

Suggested Citation

  • Arley Salazar-Hincapié & Alvaro Delgado-Mejía & Andrés Felipe Romero-Maya & Eduardo Duque-Grisales, 2020. "Experimental Assessment of the Thermal Performance of a Heat Pump Dryer System Based on the Variations in Compressor Discharge Pressure on Oregano Drying," Energies, MDPI, vol. 13(23), pages 1-14, December.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:23:p:6333-:d:454267
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    References listed on IDEAS

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