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Waste Heat and Water Recovery System Optimization for Flue Gas in Thermal Power Plants

Author

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  • Syed Safeer Mehdi Shamsi

    (Environment & Energy Mechanical Engineering, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
    Research Division for Environmental and Energy Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Korea)

  • Assmelash A. Negash

    (Environment & Energy Mechanical Engineering, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
    Research Division for Environmental and Energy Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Korea)

  • Gyu Baek Cho

    (Research Division for Environmental and Energy Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Korea)

  • Young Min Kim

    (Research Division for Environmental and Energy Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Korea)

Abstract

Fossil-fueled power plants present a problem of significant water consumption, carbon dioxide emissions, and environmental pollution. Several techniques have been developed to utilize flue gas, which can help solve these problems. Among these, the ones focusing on energy extraction beyond the dew point of the moisture present within the flue gas are quite attractive. In this study, a novel waste heat and water recovery system (WHWRS) composed of an organic Rankine cycle (ORC) and cooling cycles using singular working fluid accompanied by phase change was proposed and optimized for maximum power output. Furthermore, WHWRS configurations were analyzed for fixed water yield and fixed ambient temperature, covering possible trade-off scenarios between power loss and the number of stages as per desired yields of water recovery at ambient temperatures in a practical range. For a 600 MW power plant with 16% water vapor volume in flue gas at 150 °C, the WHWRS can produce 4–6 MWe while recovering 50% water by cooling the flue gas to 40 °C at an ambient temperature of 20 °C. Pragmatic results and design flexibility, while utilizing single working fluid, makes this proposed system a desirable candidate for practical application.

Suggested Citation

  • Syed Safeer Mehdi Shamsi & Assmelash A. Negash & Gyu Baek Cho & Young Min Kim, 2019. "Waste Heat and Water Recovery System Optimization for Flue Gas in Thermal Power Plants," Sustainability, MDPI, vol. 11(7), pages 1-20, March.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:7:p:1881-:d:218109
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    References listed on IDEAS

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    Cited by:

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    3. Young-Min Kim & Assmelash Negash & Syed Safeer Mehdi Shamsi & Dong-Gil Shin & Gyubaek Cho, 2021. "Experimental Study of a Lab-Scale Organic Rankine Cycle System for Heat and Water Recovery from Flue Gas in Thermal Power Plants," Energies, MDPI, vol. 14(14), pages 1-13, July.
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