Wärtsilä has years of valuable experience in developing liquefaction technology for small scale applications. We understand the importance of operational simplicity, flexibility, efficiency, equipment robustness, and a compact footprint when dealing with small scale LNG projects. The bottom line is to have a project that is profitable for the owner. These capabilities are well demonstrated in our references.
Reverse Brayton Cycle: The Reliable Solution for Small Scale Liquefaction
Wärtsilä’s larger 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.
These liquefaction plants are based on the Reversed Brayton nitrogen refrigeration cycle. Nitrogen is the sole refrigeration medium, and is used in a process of compressing and expanding the nitrogen to obtain the required cryogenic temperature.
Wärtsilä provides the basic complete process package, to which can be added civil engineering and construction services. The complete plant can also be supplied as an EPC delivery. Once installed, Wärtsilä further offers Operation & Maintenance agreements that are tailored to the customer’s specific needs.
The benefits of the Brayton Nitrogen Cycle from Wärtsilä include:
Small scale liquefaction plants open new market opportunities for the development of local or regional gas distribution networks, where gases did not previously exist as an alternative environmentally friendly and competitive energy source. Small scale LNG is also highly interesting as a price competitive and environmentally friendly fuel for ships, trucks and general industry. Cost and energy efficient small scale LNG plants also open possibilities to monetize previously stranded gas sources.
Gas sources can typically be pipeline gas, well gas or flare gas.
Such 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.
The Kollsnes II plant (below) located near Bergen, Norway features a complete LNG plant scope including a total gas cleaning system.