Abstract
This study explains the performance analysis of a propulsion system engine of an LNG tanker using a combined cycle whose components are gas turbine, steam turbine, and heat recovery steam generator. The researches are to determine the total resistance of an LNG tanker with a capacity of 125,000 m3 by using the Maxsurf Resistance 20 software, as well as to design the propulsion system to meet the required power from the resistance by using the Cycle-Tempo 5.0 software. The simulation results indicate a maximum power of the system of about 28,122.23 kW with a fuel consumption of about 1.173 kg/s and a system efficiency of about 48.49% in fully loaded conditions. The ship speed can reach up to 20.67 knots.
Highlights
Transportation of natural gas between islands can be done in various ways, such as through transmission pipes or by using sea transportation modes [1]
The exhaust gas was released into the environment through a staIcnkthatisadteemsigpnerpaotuwreerogf e1n9e8r°aCti.on cycle, as can be seen in Figure 5, the incoming heat (Qin) was heat taken from the gas turbine exhaust gas
The water was pumped into the heat recovery steam generator (HRSG) system
Summary
Transportation of natural gas between islands can be done in various ways, such as through transmission pipes or by using sea transportation modes [1]. The majority of active LNG ships in the world currently use a steam turbine propulsion system with a low level of efficiency; today engineers continue to develop an efficient propulsion system at the range of the power required by LNG ships. This paper has two main objectives, namely, designing the propulsion system in an LNG tanker with a combined-cycle propulsion system and calculating the performance of the combined-cycle system with an air-breathing derivative gas turbine, heat recovery steam generator (HRSG), and steam turbine as the LNG tanker’s main engine propulsion system Based on these objectives, the formulated problem is to design combined gas–electric steam (COGES) propulsion systems on LNG tankers with engine power requirements related to ship resistance at a certain speed, and to determine the tools needed to support the performance of the propulsion system
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