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Utilization of an Air-PCM Heat Exchanger in Passive Cooling of Buildings: A Simulation Study on the Energy Saving Potential in Different European Climates

Author

Listed:
  • Pavel Charvát

    (Department of Thermodynamics and Environmental Engineering, Brno University of Technology, Technická 2896/2, 61669 Brno, Czech Republic)

  • Lubomír Klimeš

    (Sustainable Process Integration Laboratory—SPIL, NETME Centre, Brno University of Technology, Technická 2896/2, 61669 Brno, Czech Republic)

  • Martin Zálešák

    (Department of Thermodynamics and Environmental Engineering, Brno University of Technology, Technická 2896/2, 61669 Brno, Czech Republic)

Abstract

The energy saving potential (ESP) of passive cooling of buildings with the use of an air-PCMheat exchanger (cold storage unit) was investigated through numerical simulations. One of the goals of the study was to identify the phase change temperature of a PCM that would provide the highest energy saving potential under the specific climate and operating conditions. The considered air-PCM heat exchanger contained 100 aluminum panels filled with a PCM. The PCM had a thermal storage capacity of 200 kJ/kg in the phase change temperature range of 4 ∘ C. The air-PCM heat exchanger was used to cool down the outdoor air supplied to a building during the day, and the heat accumulated in the PCM was rejected to the outdoors at night. The simulations were conducted for 16 locations in Europe with the investigated time period from 1 May–30 September. The outdoor temperature set point of 20 ∘ C was used for the utilization of stored cold. In the case of the location with the highest ESP, the scenarios with the temperature set point and without the set point (which provides maximum theoretical ESP) were compared under various air flow rates. The average utilization rate of the heat of fusion did not exceed 50% in any of the investigated scenarios.

Suggested Citation

  • Pavel Charvát & Lubomír Klimeš & Martin Zálešák, 2019. "Utilization of an Air-PCM Heat Exchanger in Passive Cooling of Buildings: A Simulation Study on the Energy Saving Potential in Different European Climates," Energies, MDPI, vol. 12(6), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:6:p:1133-:d:216548
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    References listed on IDEAS

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    1. Gang Liu & Yuanji Li & Pan Wei & Tian Xiao & Xiangzhao Meng & Xiaohu Yang, 2022. "Thermo-Economic Assessments on a Heat Storage Tank Filled with Graded Metal Foam," Energies, MDPI, vol. 15(19), pages 1-16, September.
    2. Jiří Jaromír Klemeš & Petar Sabev Varbanov & Paweł Ocłoń & Hon Huin Chin, 2019. "Towards Efficient and Clean Process Integration: Utilisation of Renewable Resources and Energy-Saving Technologies," Energies, MDPI, vol. 12(21), pages 1-32, October.
    3. Antonio Real-Fernández & Joaquín Navarro-Esbrí & Adrián Mota-Babiloni & Ángel Barragán-Cervera & Luis Domenech & Fernando Sánchez & Angelo Maiorino & Ciro Aprea, 2019. "Modeling of a PCM TES Tank Used as an Alternative Heat Sink for a Water Chiller. Analysis of Performance and Energy Savings," Energies, MDPI, vol. 12(19), pages 1-18, September.

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