Ships and marine technology � Performance test procedures for high-pressure pumps in LNG fuel gas supply systems (FGSS) for ships

Liquified natural gas (LNG) fuel has received significant attention as an affordable and highly efficient fuel option due to strengthened regulations on the sulfur content of bunker oil put in place by the International Maritime Organization. The main component of the LNG fuel gas supply system (FGSS) is the heat exchanger that provides adequate gas temperatures and pressures required by the engine, which also has a large machinery volume compared with other equipment. Due to the volume limitation, most FGSS have been applied to new shipbuilding only. To reduce the volume of the FGSS, CO2 was considered to serve as the replacement heat medium for conventionally used glycol water during LNG gasification. The specific power consumption (SPC) in the CO2 and glycol water system was optimized using the Aspen HYSYS thermodynamic modeler toward adjusting the temperature and pressure, and the resulting sizes were compared. This study demonstrated that the CO2 heat medium resulted in a 14% improvement in efficiency and a 7% reduction in heat exchanger size concluding that it was the most advantageous heat medium for the LNG regasification.

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An economic evaluation of operating expenditures for LNG fuel gas supply systems onboard ocean-going ships considering availability

Ships and Offshore Structures ◽

10.1080/17445302.2014.984389 ◽

2014 ◽

Vol 11 (2) ◽

pp. 213-223 ◽

Cited By ~ 15

Author(s):

Suwon Seo ◽

Bongsik Chu ◽

Yeelyong Noh ◽

Wonhee Jang ◽

Sangick Lee ◽

...

Keyword(s):

Economic Evaluation ◽

Fuel Gas ◽

Operating Expenditures ◽

Lng Fuel ◽

Supply Systems ◽

Gas Supply

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The Compression of Fuel Gas for Turbines, Engines, and Boilers in Cogeneration Plants

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.2812783 ◽

1995 ◽

Vol 117 (1) ◽

pp. 67-73

Author(s):

I. M. Arbon

Keyword(s):

High Pressure ◽

Cost Effective ◽

Capacity Control ◽

Gas Wells ◽

Fuel Gas ◽

Gas Compression ◽

Landfill Sites ◽

Synthetic Lubricants ◽

Alternative Sources ◽

Gas Supply

The proliferation of gas-fired cogeneration plants in recent years had led to many installations being located on sites remote from high-pressure gas pipelines. Since it is often impractical or not cost effective to provide a dedicated high-pressure gas supply, such installations are often based close to alternative sources of fuel, such as small natural gas wells, landfill sites, or sewage digester plants. This paper will look at typical gas sources and composition, requirements of the fired equipment, the types of fuel gas compressors normally used, methods of compressor capacity control, and the development of synthetic and semi-synthetic lubricants for fuel gas compression duty.

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