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Investigation of the forced-convection heat-transfer in the boiler flue-gas heat recovery units employing the real-time measured database

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  • Zhang, Wei
  • Wang, Suilin
  • Mu, Lianbo
  • Jamshidnia, Hamid
  • Zhao, Xudong

Abstract

Extra moistures condensation and extraction from the boiler flue-gas have been proven to be an effective measure to enhance the thermal efficiency of the boiler system. Previous researches on the condensing flue-gas heat recovery unit was based on the controlled lab condition or instant site measurement which was unable to reflect the long-term real performance of the boiler system with flue-gas heat recovery units. This research employed the real-time measurement database established between 2008 and 2019 to investigate the heat transfer at the flue-gas heat recovery unit. This solution can evaluate the long-term dynamic heat-transfer performance of the flue-gas heat recovery unit. A semi-experimental formula was established to address the relationship between the dew point temperature and heat transfer coefficient of the flue gas. It was found that the heat-transfer coefficient is sensitive to the inlet temperature of cooling water. Further, a dimensionless formula was established to address the relation among the convection heat-transfer coefficient and its other operational parameters. The all-applicable criterion equation that can judge the heat and mass transfer performance of flue-gas heat recovery units, and assess the energy saving potential of the boiler system with such a unit.

Suggested Citation

  • Zhang, Wei & Wang, Suilin & Mu, Lianbo & Jamshidnia, Hamid & Zhao, Xudong, 2022. "Investigation of the forced-convection heat-transfer in the boiler flue-gas heat recovery units employing the real-time measured database," Energy, Elsevier, vol. 238(PA).
    • Handle: RePEc:eee:energy:v:238:y:2022:i:pa:s0360544221019630
    DOI: 10.1016/j.energy.2021.121715
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    References listed on IDEAS

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    Cited by:

    1. Mu, Lianbo & Wang, Suilin & Lu, Junhui & Liu, Guichang & Zhao, Liqiu & Lan, Yuncheng, 2023. "Effect of flue gas condensing waste heat recovery and its pressure drop on energy saving and carbon reduction for refinery heating furnace," Energy, Elsevier, vol. 279(C).
    2. Mu, Lianbo & Wang, Suilin & Lu, Junhui & Li, Congna & Lan, Yuncheng & Liu, Guichang & Zhang, Tong, 2024. "Effect of hydrogen-enriched natural gas on flue gas waste heat recovery potential and condensing heat exchanger performance," Energy, Elsevier, vol. 286(C).
    3. Dezhi Jiang & Haoxian Yu & Zhihan Wang & Adam Glowacz & Grzegorz Królczyk & Zhixiong Li, 2022. "Influence of Exhaust Temperature and Flow Velocity of Marine Diesel Engines on Exhaust Gas Boiler Heat Transfer Performance," Sustainability, MDPI, vol. 15(1), pages 1-15, December.
    4. Lianbo Mu & Suilin Wang & Guichang Liu & Junhui Lu & Yuncheng Lan & Liqiu Zhao & Jincheng Liu, 2023. "On-Site Experimental Study on Low-Temperature Deep Waste Heat Recovery of Actual Flue Gas from the Reformer of Hydrogen Production," Sustainability, MDPI, vol. 15(12), pages 1-19, June.
    5. Zhao, Qiaonan & Yang, Qiguo & Xu, Hongtao & Jiao, Anyao & Pan, Donghui, 2023. "Experimental study on pollutant emission characteristics of diesel urea-based selective catalytic reduction system based on corrugated substrate," Energy, Elsevier, vol. 267(C).

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