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Approaches to energy efficiency in air conditioning: A comparative study on purge configurations for indirect evaporative cooling

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  • Oh, Seung Jin
  • Shahzad, Muhammad Wakil
  • Burhan, Muhammad
  • Chun, Wongee
  • Kian Jon, Chua
  • KumJa, M.
  • Ng, Kim Choon

Abstract

This paper presents a mathematical model to enable a more in-depth understanding of the combined heat and mass transfer processes of a counter-flow indirect evaporative cooler operating in semi-arid regions. A series of simulation was conducted to compare the performances between a single-purge and four-purge configurations. Furthermore, the effect of several parameters on the performance of the single-purge configuration was investigated under the baseline condition. The developed model was validated against experimental data from literature to within 2% discrepancy. Key results revealed that the single-purge configuration produced higher cooling capacity (around 20% higher), as well as higher dew-point effectiveness under the same operating conditions. A parametric study was also made on the single-purge configuration. The results revealed that lower product air temperature and higher dew-point effectiveness were achieved with longer channel length and larger purge ratio. However, the maximum cooling capacity approached its maximum with longer channel length and 35% purge ratio.

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  • Oh, Seung Jin & Shahzad, Muhammad Wakil & Burhan, Muhammad & Chun, Wongee & Kian Jon, Chua & KumJa, M. & Ng, Kim Choon, 2019. "Approaches to energy efficiency in air conditioning: A comparative study on purge configurations for indirect evaporative cooling," Energy, Elsevier, vol. 168(C), pages 505-515.
    • Handle: RePEc:eee:energy:v:168:y:2019:i:c:p:505-515
    DOI: 10.1016/j.energy.2018.11.077
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    Cited by:

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    3. Han, Zongwei & Ji, Qiang & Wei, Haotian & Xue, Da & Sun, Xiaoqing & Zhang, Xueping & Li, Xiuming, 2020. "Simulation study on performance of data center air-conditioning system with novel evaporative condenser," Energy, Elsevier, vol. 210(C).
    4. Yang, Hongxing & Shi, Wenchao & Chen, Yi & Min, Yunran, 2021. "Research development of indirect evaporative cooling technology: An updated review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 145(C).
    5. Zhu, Guangya & Wen, Tao & Wang, Qunwei & Xu, Xiaoyu, 2022. "A review of dew-point evaporative cooling: Recent advances and future development," Applied Energy, Elsevier, vol. 312(C).
    6. Li, Wuyan & Li, Yongcai & Shi, Wenxing & Lu, Jun, 2021. "Energy and exergy study on indirect evaporative cooler used in exhaust air heat recovery," Energy, Elsevier, vol. 235(C).
    7. Qian Chen & Muhammad Burhan & M Kum Ja & Muhammad Wakil Shahzad & Doskhan Ybyraiymkul & Hongfei Zheng & Xin Cui & Kim Choon Ng, 2022. "Hybrid Indirect Evaporative Cooling-Mechanical Vapor Compression System: A Mini-Review," Energies, MDPI, vol. 15(20), pages 1-17, October.
    8. Shahzad, Muhammad Wakil & Lin, Jie & Xu, Ben Bin & Dala, Laurent & Chen, Qian & Burhan, Muhammad & Sultan, Muhammad & Worek, William & Ng, Kim Choon, 2021. "A spatiotemporal indirect evaporative cooler enabled by transiently interceding water mist," Energy, Elsevier, vol. 217(C).

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