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Dynamic Modelling of LNG Powered Combined Energy Systems in Port Areas

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  • Davide Borelli

    (Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti, Università degli Studi di Genova, sez. Termoenergetica e Condizionamento, Via all’Opera Pia 15a, 16145 Genoa, Italy)

  • Francesco Devia

    (Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti, Università degli Studi di Genova, sez. Termoenergetica e Condizionamento, Via all’Opera Pia 15a, 16145 Genoa, Italy)

  • Corrado Schenone

    (Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti, Università degli Studi di Genova, sez. Termoenergetica e Condizionamento, Via all’Opera Pia 15a, 16145 Genoa, Italy)

  • Federico Silenzi

    (Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti, Università degli Studi di Genova, sez. Termoenergetica e Condizionamento, Via all’Opera Pia 15a, 16145 Genoa, Italy)

  • Luca A. Tagliafico

    (Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti, Università degli Studi di Genova, sez. Termoenergetica e Condizionamento, Via all’Opera Pia 15a, 16145 Genoa, Italy)

Abstract

Liquefied Natural Gas (LNG) is a crucial resource to reduce the environmental impact of fossil-fueled vehicles, especially with regards to maritime transport, where LNG is increasingly used for ship bunkering. The present paper gives insights on how the installation of LNG tanks inside harbors can be capitalized to increase the energy efficiency of port cities and reduce GHG emissions. To this purpose, a novel integrated energy system is introduced. The Boil Off Gas (BOG) from LNG tanks is exploited in a combined plant, where heat and power are produced by a regenerated gas turbine cycle; at the same time, cold exergy from LNG regasification contributes to an increase in the efficiency of a vapor compression refrigeration cycle. In the paper, the integrated energy system is simulated by means of dynamic modeling under daily variable working conditions. Results confirm that the model is stable and able to determine the time behavior of the integrated plant. Energy saving is evaluated, and daily trends of key thermophysical parameters are reported and discussed. The analysis of thermal recovering from the flue gases shows that it is possible to recover a large energy share from the turbine exhausts. Hence, the system can generate electricity for port cold ironing and, through a secondary brine loop, cold exergy for a refrigeration plant. Overall, the proposed solution allows primary energy savings up to 22% when compared with equivalent standard technologies with the same final user needs. The exploitation of an LNG regasification process through smart integration of energy systems and implementation of efficient energy grids can contribute to greener energy management in harbors.

Suggested Citation

  • Davide Borelli & Francesco Devia & Corrado Schenone & Federico Silenzi & Luca A. Tagliafico, 2021. "Dynamic Modelling of LNG Powered Combined Energy Systems in Port Areas," Energies, MDPI, vol. 14(12), pages 1-18, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:12:p:3640-:d:577624
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    References listed on IDEAS

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    Cited by:

    1. Toby Roberts & Ian Williams & John Preston & Nick Clarke & Melinda Odum & Stefanie O’Gorman, 2023. "Ports in a Storm: Port-City Environmental Challenges and Solutions," Sustainability, MDPI, vol. 15(12), pages 1-24, June.
    2. Jon Williamsson & Nicole Costa & Vendela Santén & Sara Rogerson, 2022. "Barriers and Drivers to the Implementation of Onshore Power Supply—A Literature Review," Sustainability, MDPI, vol. 14(10), pages 1-16, May.

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