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Optimizing Waste Heat Utilization in Vehicle Bio-Methane Plants

Author

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  • Feng Zhen

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, NO. 2 Nengyuan Road, Tianhe District, Guangzhou 510640, China
    CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
    College of Engineering, Northeast Agricultural University, Harbin 150030, China)

  • Jia Zhang

    (Guangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510000, China)

  • Wenzhe Li

    (College of Engineering, Northeast Agricultural University, Harbin 150030, China)

  • Yongming Sun

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, NO. 2 Nengyuan Road, Tianhe District, Guangzhou 510640, China
    CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China)

  • Xiaoying Kong

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, NO. 2 Nengyuan Road, Tianhe District, Guangzhou 510640, China
    CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China
    Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China)

Abstract

Current vehicle bio-methane plants have drawbacks associated with high energy consumption and low recovery levels of waste heat produced during the gasification process. In this paper, we have optimized the performance of heat exchange networks using pinch analysis and through the introduction of heat pump integration technology. Optimal results for the heat exchange network of a bio-gas system producing 10,000 cubic meters have been calculated using a pinch point temperature of 50 °C, a minimum heating utility load of 234.02 kW and a minimum cooling utility load of 201.25 kW. These optimal parameters are predicted to result in energy savings of 116.08 kW (19.75%), whilst the introduction of new heat pump integration technology would afford further energy savings of 95.55 kW (16.25%). The combined energy saving value of 211.63 kW corresponds to a total energy saving of 36%, with economic analysis revealing that these reforms would give annual savings of 103,300 USD. The installation costs required to introduce these process modifications are predicted to require an initial investment of 423,200 USD, which would take 4.1 years to reach payout time based on predicted annual energy savings.

Suggested Citation

  • Feng Zhen & Jia Zhang & Wenzhe Li & Yongming Sun & Xiaoying Kong, 2018. "Optimizing Waste Heat Utilization in Vehicle Bio-Methane Plants," Energies, MDPI, vol. 11(6), pages 1-13, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1518-:d:151878
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    References listed on IDEAS

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    1. Valiani, Saba & Tahouni, Nassim & Panjeshahi, M. Hassan, 2017. "Optimization of pre-combustion capture for thermal power plants using Pinch Analysis," Energy, Elsevier, vol. 119(C), pages 950-960.
    2. Panepinto, Deborah & Fiore, Silvia & Zappone, Mariantonia & Genon, Giuseppe & Meucci, Lorenza, 2016. "Evaluation of the energy efficiency of a large wastewater treatment plant in Italy," Applied Energy, Elsevier, vol. 161(C), pages 404-411.
    3. Mohammad Rozali, Nor Erniza & Wan Alwi, Sharifah Rafidah & Manan, Zainuddin Abdul & Klemeš, Jiří Jaromír, 2016. "Sensitivity analysis of hybrid power systems using Power Pinch Analysis considering Feed-in Tariff," Energy, Elsevier, vol. 116(P2), pages 1260-1268.
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    Cited by:

    1. Lai, Yee Qing & Wan Alwi, Sharifah Rafidah & Manan, Zainuddin Abdul, 2020. "Graphical customisation of process and utility changes for heat exchanger network retrofit using individual stream temperature versus enthalpy plot," Energy, Elsevier, vol. 203(C).

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