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Effects of ejector geometries on performance of ejector-expansion R410A air conditioner considering cooling seasonal performance factor

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  • Jeon, Yongseok
  • Jung, Jongho
  • Kim, Dongwoo
  • Kim, Sunjae
  • Kim, Yongchan

Abstract

The objective of this study was to investigate the effects of ejector geometries on the performance of an ejector-expansion air conditioner (EEAC) considering the cooling seasonal performance factor (CSPF). The performance of the EEAC using R410A was measured and analyzed by varying the compressor speed, outdoor-bin temperature, operating pressures, nozzle-throat diameter, and mixing-section diameter. The EEAC in the medium-capacity mode exhibited maximum coefficient of performance (COP) improvement, i.e., 7.5%, over the baseline (conventional) cycle. The optimum mixing-section diameter was determined to be 9mm based on the CSPF. In addition, the optimum mixing-section diameter increased with an increase in the annual average outdoor temperature. The CSPF of the EEAC with the optimized mixing-section diameter improved in the range of 16.0–20.3% over the baseline cycle depending on the climatic conditions.

Suggested Citation

  • Jeon, Yongseok & Jung, Jongho & Kim, Dongwoo & Kim, Sunjae & Kim, Yongchan, 2017. "Effects of ejector geometries on performance of ejector-expansion R410A air conditioner considering cooling seasonal performance factor," Applied Energy, Elsevier, vol. 205(C), pages 761-768.
    • Handle: RePEc:eee:appene:v:205:y:2017:i:c:p:761-768
    DOI: 10.1016/j.apenergy.2017.08.059
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    Cited by:

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    4. Yang, Yan & Zhu, Xiaowei & Yan, Yuying & Ding, Hongbing & Wen, Chuang, 2019. "Performance of supersonic steam ejectors considering the nonequilibrium condensation phenomenon for efficient energy utilisation," Applied Energy, Elsevier, vol. 242(C), pages 157-167.
    5. Damoon Aghazadeh Dokandari & S. M. S. Mahmoudi & M. Bidi & Ramin Haghighi Khoshkhoo & Marc A. Rosen, 2018. "First and Second Law Analyses of Trans-critical N 2 O Refrigeration Cycle Using an Ejector," Sustainability, MDPI, vol. 10(4), pages 1-14, April.
    6. Wen, Chuang & Rogie, Brice & Kærn, Martin Ryhl & Rothuizen, Erasmus, 2020. "A first study of the potential of integrating an ejector in hydrogen fuelling stations for fuelling high pressure hydrogen vehicles," Applied Energy, Elsevier, vol. 260(C).
    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. Jeon, Yongseok & Kim, Sunjae & Lee, Sang Hun & Chung, Hyun Joon & Kim, Yongchan, 2020. "Seasonal energy performance characteristics of novel ejector-expansion air conditioners with low-GWP refrigerants," Applied Energy, Elsevier, vol. 278(C).
    9. Liu, Ye & Yu, Jianlin, 2018. "Performance analysis of an advanced ejector-expansion autocascade refrigeration cycle," Energy, Elsevier, vol. 165(PB), pages 859-867.
    10. Yongseok Jeon & Hoon Kim & Jae Hwan Ahn & Sanghoon Kim, 2020. "Effects of Nozzle Exit Position on Condenser Outlet Split Ejector-Based R600a Household Refrigeration Cycle," Energies, MDPI, vol. 13(19), pages 1-12, October.
    11. Bai, Tao & Yan, Gang & Yu, Jianlin, 2019. "Thermodynamic assessment of a condenser outlet split ejector-based high temperature heat pump cycle using various low GWP refrigerants," Energy, Elsevier, vol. 179(C), pages 850-862.
    12. Tashtoush, Bourhan M. & Al-Nimr, Moh'd A. & Khasawneh, Mohammad A., 2019. "A comprehensive review of ejector design, performance, and applications," Applied Energy, Elsevier, vol. 240(C), pages 138-172.
    13. Tashtoush, Bourhan M. & Al-Nimr, Moh'd A. & Khasawneh, Mohammad A., 2017. "Investigation of the use of nano-refrigerants to enhance the performance of an ejector refrigeration system," Applied Energy, Elsevier, vol. 206(C), pages 1446-1463.
    14. Bai, Tao & Yan, Gang & Yu, Jianlin, 2018. "Experimental research on the pull-down performance of an ejector enhanced auto-cascade refrigeration system for low-temperature freezer," Energy, Elsevier, vol. 157(C), pages 647-657.

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