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Advanced Method of Variable Refrigerant Flow (VRF) Systems Designing to Forecast On-Site Operation—Part 1: General Approaches and Criteria

Author

Listed:
  • Mykola Radchenko

    (Department of Air Conditioning and Refrigeration, Admiral Makarov National University of Shipbuilding, Heroes of Ukraine Avenue 9, 54025 Mykolayiv, Ukraine)

  • Andrii Radchenko

    (Department of Air Conditioning and Refrigeration, Admiral Makarov National University of Shipbuilding, Heroes of Ukraine Avenue 9, 54025 Mykolayiv, Ukraine)

  • Eugeniy Trushliakov

    (Department of Air Conditioning and Refrigeration, Admiral Makarov National University of Shipbuilding, Heroes of Ukraine Avenue 9, 54025 Mykolayiv, Ukraine)

  • Anatoliy Pavlenko

    (Department of Building Physics and Renewable Energy, Kielce University of Technology, Avenue 1000—Years of the Polish State 7, 25-314 Kielce, Poland)

  • Roman Radchenko

    (Department of Air Conditioning and Refrigeration, Admiral Makarov National University of Shipbuilding, Heroes of Ukraine Avenue 9, 54025 Mykolayiv, Ukraine)

Abstract

All the energetic management and controlling strategies in ambient air conditioning systems (ACS) are aimed to match design load to current needs. This might be achieved by determining a rational value of design thermal load without overestimation that can minimize its deviation from the actual values. The application of variable refrigerant flow (VRF) systems with speed-regulated compressors (SRC) is considered as the most advanced trend in building air conditioning due to the ability of SRCs to cover changeable heat loads without lowering their efficiency. The level of load regulation by SRC is evaluated as the ratio of the load range, regulated by SCR, to the overall design load range. With this, the range of actual changeable loads is usually supposed to be covered by SRC entirely while keeping the rest, unregulated, and load range unchangeable. However, to confirm this, the rest load range behind the regulated one should be investigated to estimate the efficiency of SRC operation. Therefore, the approach to dividing the overall thermal load range of ambient air conditioning into the ranges of changeable and unchangeable loads to compare with those covered by SRC is used. From this approach, the method of rational designing and shearing a design refrigeration capacity in response to current loading, based on the principle of two-stage ambient air conditioning, has been widened on the VRF systems to estimate the efficiency of SCR application. This was realized by imposing the load ranges regulated by SRC onto the ranges of changeable and unchangeable loads within the overall range of actual loading. The proposed innovative criteria and indicators for rational shearing the load ranges to match current duties and load level evaluation can reveal the reserves for improving the efficiency of SRC compressor operation and the ACS of VRF type as a whole.

Suggested Citation

  • Mykola Radchenko & Andrii Radchenko & Eugeniy Trushliakov & Anatoliy Pavlenko & Roman Radchenko, 2023. "Advanced Method of Variable Refrigerant Flow (VRF) Systems Designing to Forecast On-Site Operation—Part 1: General Approaches and Criteria," Energies, MDPI, vol. 16(3), pages 1-18, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1381-:d:1051073
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    References listed on IDEAS

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    1. Maraver, Daniel & Sin, Ana & Royo, Javier & Sebastián, Fernando, 2013. "Assessment of CCHP systems based on biomass combustion for small-scale applications through a review of the technology and analysis of energy efficiency parameters," Applied Energy, Elsevier, vol. 102(C), pages 1303-1313.
    2. Andrii Radchenko & Mykola Radchenko & Dariusz Mikielewicz & Anatoliy Pavlenko & Roman Radchenko & Serhiy Forduy, 2022. "Energy Saving in Trigeneration Plant for Food Industries," Energies, MDPI, vol. 15(3), pages 1-14, February.
    3. Zongming Yang & Roman Radchenko & Mykola Radchenko & Andrii Radchenko & Victoria Kornienko, 2022. "Cooling Potential of Ship Engine Intake Air Cooling and Its Realization on the Route Line," Sustainability, MDPI, vol. 14(22), pages 1-15, November.
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    Cited by:

    1. Serhiy Serbin & Mykola Radchenko & Anatoliy Pavlenko & Kateryna Burunsuz & Andrii Radchenko & Daifen Chen, 2023. "Improving Ecological Efficiency of Gas Turbine Power System by Combusting Hydrogen and Hydrogen-Natural Gas Mixtures," Energies, MDPI, vol. 16(9), pages 1-23, April.

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