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Exhaust Systems Well-designed exhaust systems collect exhaust gases from engine cylinders and discharge them as quickly and silently as possible. Primary system design considerations include: Minimizing resistance to gas flow (back pressure) and keeping it within the limits specified for the particular engine model and rating to. Masaaki Okubo, Takuya Kuwahara, in New Technologies for Emission Control in Marine Diesel Engines, SO x emission and MARPOL convention. The release of marine engine exhaust gas into the atmosphere is needed to be lowered especially to suppress the emission of SO x from marine diesel engines. In this regard, the MARPOL convention Annex VI, Regulation 14 was . The technology has led to higher tolerance of the machines and systems in modern turbines for increased operating temperature. Due to these reasons, choosing the inlet filtration system is crucial point of the gas turbine design. Sub-standard inlet air systems can negatively affect operations, performance and lifespan of the gas turbine. shp LM+ marine gas turbine is based on the design and precedent-setting reliability of GE's popular LM Download Data Sheet. Makin Island Case History. Experience List. GE Marine Gas Turbines for Frigates. Split Case Design for Gas Turbine Repair. 40, shp (30, kW) lb/shp-hr ( g/kW-hr) 6, Btu/shp-hr.
The exhaust section of the gas turbine engine consists of several components. Although the components have individual purposes, they also have one common function: they must direct the flow of hot gases rearward in such a manner as to prevent turbulence and, at the same time, impart a high final or exit velocity to the gases. The efficiency of a gas turbine is defined by comparing the amount of power contained in the fuel fed into the engine with the amount of power yielded. The thermal efficiency is thus: (6) and the heat rate is: (7) In this paper, T 3, turbine inlet temperature (TIT) and turbine rotor inlet temperature (TRIT) will be (loosely) referenced as firing. The power turbine studied is a two-stage design with cooling air bleeding from the gas generator compressor to the first stage disk rim. The power turbine has accumulated , operating hours since installation in the late s. The power turbine inlet temperature at ISO base load according to the published information is °F and the exhaust temperature is °F. 1. The inlet section 2. The compressor section 3. The combustion section (the combustor) 4. The turbine (and exhaust) section. The turbine section of the gas turbine engine has the task of producing usable output shaft power to drive the propeller. In addition, it must also provide power to drive the compressor and all engine Size: KB.
The LNG carriers are undergoing a period of rapid and profound change, with much larger size ships and novel propulsion systems emerging for fulfilling the market trends of LNG shipping industry. There are various proposed propulsion solutions for LNG carriers, ranging from the conventional steam turbine and dual fuel diesel electric propulsion, until more innovative ideas such as slow speed Cited by: 3. LM Gas Turbine Engine As the Navy proceeds into the twenty first century, gas turbine ships will become more and more abundant. GE's highly-successful, well-proven LM aeroderivative gas turbine is directly derived from GE's CF6 family of commercial . However, turbine inlet temperature is limited by the thermal conditions that can be tolerated by the turbine blade metal alloy. Gas temperatures at the turbine inlet can be ºC to ºC, but some manufacturers have boosted inlet temperatures as high as ºC by engineering blade coatings and cooling systems to protect metallurgical. The LM marine gas turbine is a simple-cycle, two-shaft, high-performance engine. Derived from GE's CF aircraft engines, the LM consists of a gas generator, a power turbine, attached fuel and lube oil pumps, a fuel control and speed governing system, associated inlet and exhaust sections, lube and scavenge systems as well as controls and devices for starting and monitoring engine.