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Impact of Negative Factors on Performance of Cryogenic Unit of LNG Gas-Turbine Engine Fuel System

LNG gas-turbine engines have several advantages over diesel engines: capacity to develop higher power with smaller weight and size, lower fuel price, environment friendliness, etc. At the same time, this type of engines is characterized by low efficiency at insufficient load and high idle-run fuel consumption. A part of the energy losses under these conditions occurs in the cryogenic unit of the LNG gas-turbine engine fuel system. Schematic diagrams and characteristic features of the cryogenic unit of the LNG gas-turbine engine are presented. Schemes of LNG delivery with vapor-pressurization, sparging of the tank with an external noncondensing gas, and use of pumps are described. The impact on the fuel system performance of such factors as fuel delivery mode, LNG flow return, restraining temperature of the delivered LNG, variation of LNG composition, etc. are investigated. The criteria of efficiency of the system in start, main, and idle modes are calculated by mathematical modeling method.

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Correspondence to I. A. Arkharov.

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Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, Vol. 56, No. 5, pp. 12−16, May 2020.

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Arkharov, I.A., Navasardyan, E.S., Krotov, A.S. et al. Impact of Negative Factors on Performance of Cryogenic Unit of LNG Gas-Turbine Engine Fuel System. Chem Petrol Eng 56, 351–359 (2020).

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  • LNG
  • gas-turbine engine
  • fuel system
  • pressurization system