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Preliminary experimental results with a solar driven ejector air conditioner in Portugal

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  • Varga, Szabolcs
  • Oliveira, Armando C.
  • Palmero-Marrero, Anna
  • Vrba, Jakub

Abstract

The first experimental results with a small scale solar driven ejector cooling system installed in Porto, Portugal are reported. The system is constituted by three sub-systems: solar collector field, cooling cycle and thermal energy distribution sub-systems. The novelty in the cooling cycle is a 1.5 kW nominal capacity variable geometry ejector using R600a as working fluid. The integrated system is designed such that it can be used for cooling (summer) and heating (winter) of a 16 m2 test room. Experimental performance data, including e.g. collector efficiency, COP, cooling power, were collected between April and July 2016. The results indicated that the cooling capacity ranged from 1 to 2 kW depending on the operating conditions. Thermal COP of the ejector cycle was found to vary between 0.15 and 0.40. Average electrical COP was 4.6. The results indicated excellent working stability on clear days and on partially cloudy days with short interruptions of the solar radiation (<20 min). The benefits of using a variable geometry ejector and optimal operation are also demonstrated.

Suggested Citation

  • Varga, Szabolcs & Oliveira, Armando C. & Palmero-Marrero, Anna & Vrba, Jakub, 2017. "Preliminary experimental results with a solar driven ejector air conditioner in Portugal," Renewable Energy, Elsevier, vol. 109(C), pages 83-92.
    • Handle: RePEc:eee:renene:v:109:y:2017:i:c:p:83-92
    DOI: 10.1016/j.renene.2017.03.016
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    References listed on IDEAS

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    Cited by:

    1. Peris Pérez, Bernardo & Ávila Gutiérrez, Miguel & Expósito Carrillo, José Antonio & Salmerón Lissén, José Manuel, 2022. "Performance of Solar-driven Ejector Refrigeration System (SERS) as pre-cooling system for air handling units in warm climates," Energy, Elsevier, vol. 238(PA).
    2. Braimakis, Konstantinos, 2021. "Solar ejector cooling systems: A review," Renewable Energy, Elsevier, vol. 164(C), pages 566-602.
    3. Andrés Villarruel-Jaramillo & Manuel Pérez-García & José M. Cardemil & Rodrigo A. Escobar, 2021. "Review of Polygeneration Schemes with Solar Cooling Technologies and Potential Industrial Applications," Energies, MDPI, vol. 14(20), pages 1-30, October.
    4. Wu, Yifei & Zhao, Hongxia & Zhang, Cunquan & Wang, Lei & Han, Jitian, 2018. "Optimization analysis of structure parameters of steam ejector based on CFD and orthogonal test," Energy, Elsevier, vol. 151(C), pages 79-93.
    5. Kittiwoot Sutthivirode & Tongchana Thongtip, 2022. "Experimental Determination of an Optimal Performance Map of a Steam Ejector Refrigeration System," Energies, MDPI, vol. 15(12), pages 1-19, June.
    6. Petrovic, Andrija & Jovanovic, Milos Z. & Genic, Srbislav & Bugaric, Ugljesa & Delibasic, Boris, 2018. "Evaluating performances of 1-D models to predict variable area supersonic gas ejector performances," Energy, Elsevier, vol. 163(C), pages 270-289.
    7. Tongchana Thongtip & Natthawut Ruangtrakoon, 2021. "Real Air-Conditioning Performance of Ejector Refrigerator Based Air-Conditioner Powered by Low Temperature Heat Source," Energies, MDPI, vol. 14(3), pages 1-20, January.
    8. Van Vu Nguyen & Szabolcs Varga & Vaclav Dvorak, 2019. "HFO1234ze(e) As an Alternative Refrigerant for Ejector Cooling Technology," Energies, MDPI, vol. 12(21), pages 1-14, October.
    9. Tang, Yongzhi & Liu, Zhongliang & Li, Yanxia & Shi, Can & Lv, Chen, 2019. "A combined pressure regulation technology with multi-optimization of the entrainment passage for performance improvement of the steam ejector in MED-TVC desalination system," Energy, Elsevier, vol. 175(C), pages 46-57.

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