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Sustainable development

Integrated Waste Heat and Cold Energy Recovery System for Marine Natural Gas Engines

Strategic Insights

— 1 min read

Researchers at Guangxi University have developed an efficient and sustainable technology for the shipping industry, which can conserve energy, reduce pollution, and satisfy the dynamic energy demands of a ship. The proposed system, which combines waste heat and cold energy recovery, has been proven to be economically viable and effective in reducing carbon dioxide emissions. The study, funded by the National Natural Science Foundation of China, demonstrates the potential of this technology in meeting the urgent need for efficient, clean, and sustainable energy solutions in the shipping industry.

Key Takeaways:

  • The integrated waste heat and cold energy recovery system for marine natural gas engines can conserve energy, reduce pollution, and satisfy the dynamic daily energy demands of a ship.
  • The proposed system has a recovery period of 6.976 years, which indicates that the initial investment cost can be recovered.
  • The fuel savings and reduction in carbon dioxide emissions of the proposed system are 38.55 kg/h and 52.08 kg/h, respectively, compared to the original engine.
  • The net power production and thermal efficiency of the proposed system are 214.5 kW and 5.14% higher, respectively, than the original engine.
  • The proposed system achieves energy conservation, pollution reduction, and satisfies the dynamic energy demands of the ship.
  • The system is also economically viable and fills the gap of multiform utilisation of cold energy in waste heat recovery.
  • The study's conclusions have been peer-reviewed and published in the Journal of Cleaner Production.

Statistics:

  • Recovery period of the proposed system: 6.976 years
  • Fuel savings: 38.55 kg/h
  • Reduction in carbon dioxide emissions: 52.08 kg/h
  • Net power production: 214.5 kW
  • Thermal efficiency: 5.14%
  • Initial investment cost recovery period: 6.976 years

Sources:

  • Investigators at Guangxi University
  • Guangxi University, College of Mechanical Engineering, Nanning 530004, People's Republic of China
  • National Natural Science Foundation of China
  • Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England
  • Journal of Cleaner Production, 2020;274. Journal of Cleaner Production can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England.

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