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Optimization of the counter-flow heat and mass exchanger for M-Cycle indirect evaporative cooling assisted with entropy analysis

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  • Wang, Lei
  • Zhan, Changhong
  • Zhang, Jianli
  • Zhao, Xudong

Abstract

The dew point Indirect Evaporative Cooling (IEC) achieved through Maisotsenko cycle (M-Cycle) is a complicated thermodynamic process. For further understanding of the heat and mass transfer occurred in a dew point indirect evaporative air cooler with M-Cycle counter-flow configuration, the paper presents a novel mathematical model that combined the law of energy conservation and the principle of the irreversible thermodynamic theory. The model, comprising of numerous mass, energy and entropy equations, was used to carry out the parametric study of the dew point air cooler under various operational and structural conditions. The entropy production number is found to be a promising indicator for optimized design. Through the combined analysis of energy efficiency and thermodynamic irreversibility of the target IEC system, the recommended average air velocity in dry channels should be less than 1.0 m/s, the channel length should be in the range of 1–1.75 m and the channel gap should be controlled to 3–5 mm, while the working to intake air ratio should be around 0.3–0.4. The modeling analysis has provided a theoretical perspective of irreversible degree of energy utilization for thermal analysis of dew point IEC, and thus laid the theoretical foundation for the optimization design of this kind of cooler.

Suggested Citation

  • Wang, Lei & Zhan, Changhong & Zhang, Jianli & Zhao, Xudong, 2019. "Optimization of the counter-flow heat and mass exchanger for M-Cycle indirect evaporative cooling assisted with entropy analysis," Energy, Elsevier, vol. 171(C), pages 1206-1216.
    • Handle: RePEc:eee:energy:v:171:y:2019:i:c:p:1206-1216
    DOI: 10.1016/j.energy.2019.01.099
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    References listed on IDEAS

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    1. Xu, Peng & Ma, Xiaoli & Diallo, Thierno M.O. & Zhao, Xudong & Fancey, Kevin & Li, Deying & Chen, Hongbing, 2016. "Numerical investigation of the energy performance of a guideless irregular heat and mass exchanger with corrugated heat transfer surface for dew point cooling," Energy, Elsevier, vol. 109(C), pages 803-817.
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    3. Zhan, Changhong & Duan, Zhiyin & Zhao, Xudong & Smith, Stefan & Jin, Hong & Riffat, Saffa, 2011. "Comparative study of the performance of the M-cycle counter-flow and cross-flow heat exchangers for indirect evaporative cooling – Paving the path toward sustainable cooling of buildings," Energy, Elsevier, vol. 36(12), pages 6790-6805.
    4. Hsu, Shyr Tzer & Lavan, Zalman & Worek, William M., 1989. "Optimization of wet-surface heat exchangers," Energy, Elsevier, vol. 14(11), pages 757-770.
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    Cited by:

    1. Yan, Weichao & Cui, Xin & Meng, Xiangzhao & Yang, Chuanjun & Liu, Yilin & An, Hui & Jin, Liwen, 2023. "Effect of random fiber distribution on the performance of counter-flow hollow fiber membrane-based direct evaporative coolers," Energy, Elsevier, vol. 282(C).
    2. Yan, Weichao & Cui, Xin & Meng, Xiangzhao & Yang, Chuanjun & Liu, Yilin & An, Hui & Jin, Liwen, 2023. "Effects of membrane characteristics on the evaporative cooling performance for hollow fiber membrane modules," Energy, Elsevier, vol. 270(C).
    3. Cui, Yuanlong & Zhu, Jie & Zoras, Stamatis & Liu, Lin, 2021. "Review of the recent advances in dew point evaporative cooling technology: 3E (energy, economic and environmental) assessments," Renewable and Sustainable Energy Reviews, Elsevier, vol. 148(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. Cui, Xin & Yang, Chuanjun & Yan, Weichao & Zhang, Lianying & Wan, Yangda & Chua, Kian Jon, 2023. "Experimental study on a moisture-conducting fiber-assisted tubular indirect evaporative cooler," Energy, Elsevier, vol. 278(PB).
    6. Tariq, Rasikh & Sheikh, Nadeem Ahmed & Livas-García, A. & Xamán, J. & Bassam, A. & Maisotsenko, Valeriy, 2021. "Projecting global water footprints diminution of a dew-point cooling system: Sustainability approach assisted with energetic and economic assessment," Renewable and Sustainable Energy Reviews, Elsevier, vol. 140(C).
    7. 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).
    8. Shao, Shuangquan & Liu, Haichao & Zhang, Hainan & Tian, Changqing, 2019. "Experimental investigation on a loop thermosyphon with evaporative condenser for free cooling of data centers," Energy, Elsevier, vol. 185(C), pages 829-836.

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