In English

Framdrivningssystem för LNG-tankfartyg - användning av gasturbin för elektrisk framdrivning

Propulsion system for LNG-carriers - utilization of gas turbines for electric propulsion

Isabelle Moberg ; Jimmy Alfredsson
Göteborg : Chalmers tekniska högskola, 2014. 40 s.
[Examensarbete på grundnivå]

In this literature study, the advantages and disadvantages for gas turbine electric propulsion are compared with those for dual fuel diesel electric propulsion of LNG carriers. LNG is natural gas that has been liquefied to facilitate the transportation. The boiling off gas is used as primary fuel since it is more environmentally friendly than heavy fuel oil. The result show that the choice of prime mover for LNG carriers depends on i.a. degree of efficiency, fuel consumption, available cargo space and the reliability and availability of the systems. The ability to dispose the boil off gas is a central matter for the availability of the prime mover. Currently, there are no LNG carriers using gas turbine electric as a prime mover. The study however shows that gas turbine electric propulsion in combination with steam turbines has good qualifications to compete with the commercial propulsion systems; steam turbines and slow speed diesel engines with reliquefaction plant. Gas turbine electric propulsion in combination with a steam turbine is more beneficial than dual fuel diesel electric propulsion, since gas turbines are able to use the boil off gas at all running situations.

Nyckelord: LNG, gasturbin, DFGE, gasturbinelektrisk, COGES, DFDE, dual fuel, dieselelektriskt, BOG, återkondenseringsanläggning



Publikationen registrerades 2014-10-10. Den ändrades senast 2015-01-15

CPL ID: 204089

Detta är en tjänst från Chalmers bibliotek