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Water-In-Oil Emulsion as Boiler Fuel for Reduced NO x Emissions and Improved Energy Saving

Author

Listed:
  • Chung-Yao Hsuan

    (Green Energy Technology Research Center, Kun Shan University, Tainan 71070, Taiwan)

  • Shuhn-Shyurng Hou

    (Department of Mechanical Engineering, Kun Shan University, Tainan 71070, Taiwan)

  • Yun-Li Wang

    (Department of Mechanical Engineering, Kun Shan University, Tainan 71070, Taiwan)

  • Ta-Hui Lin

    (Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
    Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 70101, Taiwan)

Abstract

An experimental system for observing the drop vaporization and microexplosion characteristics of emulsified droplets in high-temperature environments was conducted to analyze the effects of environmental temperature, droplet size, and water content on droplet behavior. In addition, emulsified low-sulfur heavy fuel oil (HFO) with a 20 vol% water content and pure low-sulfur HFO were used as fuels for burning in an industrial boiler under normal operating conditions. The results showed that by using an emulsified HFO with a 20 vol% water content, the boiler efficiency can be improved by 2%, and that a reduction of 35 ppm in NO x emissions (corresponding to a NO x reduction rate of 18%) can be achieved. These advantages are due to the occurrence of a microexplosion during the combustion of the emulsified droplets. It was observed that when emulsified HFO with a 20 vol% water content was used, the fuel (HFO) consumption rate was 252 l/h. On the other hand, the fuel consumption rate was 271 l/h when pure low-sulfur HFO was used. Therefore, a reduction of 19 l/h in the fuel (HFO) consumption rate was achieved when using the water-in-oil emulsion, corresponding to fuel savings of 7%.

Suggested Citation

  • Chung-Yao Hsuan & Shuhn-Shyurng Hou & Yun-Li Wang & Ta-Hui Lin, 2019. "Water-In-Oil Emulsion as Boiler Fuel for Reduced NO x Emissions and Improved Energy Saving," Energies, MDPI, vol. 12(6), pages 1-14, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:6:p:1002-:d:214027
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    References listed on IDEAS

    as
    1. Moonchan Kim & Jungmo Oh & Changhee Lee, 2018. "Study on Combustion and Emission Characteristics of Marine Diesel Oil and Water-In-Oil Emulsified Marine Diesel Oil," Energies, MDPI, vol. 11(7), pages 1-16, July.
    2. Liyan Feng & Baoguo Du & Jiangping Tian & Wuqiang Long & Bin Tang, 2015. "Combustion Performance and Emission Characteristics of a Diesel Engine Using a Water-Emulsified Heavy Fuel Oil and Light Diesel Blend," Energies, MDPI, vol. 8(12), pages 1-13, December.
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    Cited by:

    1. Chen, Zhenbin & Wang, Li & Wei, Zhilong & Wang, Yu & Deng, Jiaojun, 2022. "Effect of components on the emulsification characteristic of glucose solution emulsified heavy fuel oil," Energy, Elsevier, vol. 244(PB).

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