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Improving the Economic Efficiency of Heat Pump Integration into Distillation Columns of Process Plants Applying Different Pressures of Evaporators and Condensers

Author

Listed:
  • Stanislav Boldyryev

    (Faculty of Mechanical Engineering and Naval Architecture, The University of Zagreb, 10000 Zagreb, Croatia)

  • Mariia Ilchenko

    (Department of Integrated Technologies, Processes and Apparatuses, National Technical University “Kharkiv Polytechnic Institute”, 61000 Kharkiv, Ukraine)

  • Goran Krajačić

    (Faculty of Mechanical Engineering and Naval Architecture, The University of Zagreb, 10000 Zagreb, Croatia)

Abstract

The electrification of process industries is one of the main challenges when building a low-carbon society since they consume huge amounts of fossil fuels, generating different emissions. Heat pumps are some of the key players in the industrial sector of the carbon-neutral market. This study proposes an approach to improve the economic feasibility of heat pumps within process plants. Initial energy targeting with grand composite curves was used and supplemented with the detailed design of an evaporator and a compressor for different condensation and evaporation pressures. The trade-off between the capital cost of the heat pump and the electricity cost was investigated, and optimal configurations were selected. This case study investigates the gas fractioning unit of a polymer plant, where three heat pumps are integrated into distillation columns. The results demonstrate that the heat recovery is 174 MW and requires an additional 37.9 MW of electricity to reduce the hot utility by 212 MW. The selection of the evaporation and condensation pressures of heat pumps allows 21.5 M EUR/y to be saved for 7 years of plant operation. The emission-saving potential is estimated at 1.89 ktCO 2 /y.

Suggested Citation

  • Stanislav Boldyryev & Mariia Ilchenko & Goran Krajačić, 2024. "Improving the Economic Efficiency of Heat Pump Integration into Distillation Columns of Process Plants Applying Different Pressures of Evaporators and Condensers," Energies, MDPI, vol. 17(4), pages 1-31, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:4:p:951-:d:1340987
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    References listed on IDEAS

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