A dynamic simulation of a cryogenic power generation system on an LNG fuelled vessel based on ORC technology

Yi Li, Dawei Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution


With the growth increasing of the LNG market, using LNG as a fuel becomes more appealing to ship owners and operators. More ships of various types on order-book choose LNG fuel propulsion systems to replace conventional HFO and marine diesel fuel system. This study proposes a new waste energy power generation system to recover the exhaust heat of marine engines and use the cryogenic energy from LNG fuel evaporation systems. The system is built on a main cycle, ie an Organic Rankine cycle (ORC), with a bottom cycle with the LNG direct expansion process. The selected working fluid operates in the temperature range of -104 to 200 ℃. The operating data from a real LNG fueled case ship is as the input data in the dynamic simulation applied using the software - Siemens LMS Imagine.Lab AMESim. Multiple working conditions are studied in the simulation in terms of the different fuel consumption levels of the case ship. The simulation of the proposed system shows a significant improvement in thermal efficiency and power production in comparison to the existing waste energy power generation system on board the case ship.
Original languageEnglish
Title of host publicationIIR Rankine Conference 2020
PublisherInternational Institute of Refrigeration
Number of pages9
ISBN (Print)978-2-36215-038-8
Publication statusPublished - 31 Jul 2020
EventIIR Rankine Conference 2020: Advances in Cooling, Heating and Power Generation - Virtual, United Kingdom
Duration: 27 Jul 202031 Jul 2020

Publication series

NameScience et technique du froid
ISSN (Print)0151-1637


ConferenceIIR Rankine Conference 2020
Country/TerritoryUnited Kingdom


  • LNG
  • Cryogenics
  • Organic Rankine Cycle
  • Modeling
  • Simulation
  • Ship
  • Lost heat
  • Heat recovery
  • Fuel


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