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Experimental Study of a Lab-Scale Organic Rankine Cycle System for Heat and Water Recovery from Flue Gas in Thermal Power Plants

Author

Listed:
  • Young-Min Kim

    (Research Division of Environmental and Energy Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34104, Korea)

  • Assmelash Negash

    (Research Division of Environmental and Energy Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34104, Korea
    Environment & Energy Mechanical Engineering, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea)

  • Syed Safeer Mehdi Shamsi

    (Environment & Energy Mechanical Engineering, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
    Department of Mechanical Engineering, Aerospace and Aviation Campus, Air University, Kamra 43570, Pakistan)

  • Dong-Gil Shin

    (Research Division of Environmental and Energy Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34104, Korea)

  • Gyubaek Cho

    (Research Division of Environmental and Energy Systems, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34104, Korea)

Abstract

Fossil fuel power plants can cause numerous environmental issues, owing to exhaust emissions and substantial water consumption. In a thermal power plant, heat and water recovery from flue gas can reduce CO 2 emissions and water demand. High-humidity flue gas averts the diffusion of pollutants, enhances the secondary transformation of air pollutants, and leads to smog weather; hence, water recovery from flue gas can also help to lessen the incidence of white plumes and smog near and around the power plant. In this study, a lab-scale system for heat and water recovery from flue gas was tested. The flue gas was initially cooled by an organic Rankine cycle (ORC) system to produce power. This gas was further cooled by an aftercooler, using the same working fluid to condense the water and condensable particulate matter in the flue gas. The ORC system can produce approximately 220 W of additional power from flue gas at 140 °C, with a thermal efficiency of 10%. By cooling the flue gas below 30–40 °C, the aftercooler can recover 60% of the water in it.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:14:p:4328-:d:596576
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    References listed on IDEAS

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    1. Negash, Assmelash & Kim, Young Min & Shin, Dong Gil & Cho, Gyu Baek, 2018. "Optimization of organic Rankine cycle used for waste heat recovery of construction equipment engine with additional waste heat of hydraulic oil cooler," Energy, Elsevier, vol. 143(C), pages 797-811.
    2. 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.
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