Wärtsilä’s liquefaction plants are easy to operate, reliable, and fully automated. They represent a low lifecycle cost solution in the small to medium size liquefaction capacity range.
Our liquefaction plants are based on the reversed Brayton nitrogen refrigeration cycle, with commercial grade nitrogen as the sole refrigeration medium. We can provide the basic complete process package, as well as civil engineering and construction services. The complete plant can also be supplied as an EPC delivery. Once installed, Wärtsilä further offers operation and maintenance agreements tailored to the customer's specific needs.
Our liquefaction process is based on proprietary reversed Brayton technology. Commercial-grade nitrogen is the sole refrigeration medium and is used in a process of compressing and expanding the nitrogen to obtain the required cryogenic temperature.
Gas sources can typically be pipeline gas, well gas, or flare gas. The gases need to be cleaned to achieve low contents of water (1 ppm), CO2 (<50 ppm), and H2S (< 4ppm). Gas cleaning systems can also be delivered by Wärtsilä upon request.
Main technical data:
3D model for 400 ton per day plant
In areas where gases previously were not environmentally friendly and competitive energy sources, small-scale liquefaction plants open new market opportunities for the development of local or regional gas distribution networks.
In addition, small-scale LNG is also highly interesting as a price-competitive and environmentally friendly fuel for ships, trucks, and the general industry.
Cost and energy efficient small scale LNG plants also open possibilities to monetize previously stranded gas sources, such as pipeline gas, well gas or flare gas.
The Kollsnes II 240 ton per day plant
The benefits of Wärtsilä’s reversed Brayton cycle liquefaction technology include:
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