LNG production plants

Stirling Cryogenics has designed an integrated gas purification & liquefaction plant together with sister company Hysytech Srl from Turin, Italy for micro scale LNG production.

The plants are of a modular design and can be supplied in the range of 1 – 30 ton/day with each Stirling module producing approximately 1 ton/day. There are several different designs for different feed gas compositions. Standard designs are available for:

• Biogas
• Biomethane
• Pipeline Natural Gas

With its in-house engineering department Stirling Cryogenics offers tailored designs as well for:

• Natural Gas from a well
• Associated Gas from oil drilling
• Landfill Gas

Plant Efficiency
Due to the efficient Stirling Cycle, the Stirling integrated purification & liquefaction plants are very energy efficient. Liquefaction of methane can be achieved at as low as 0.60 kWh/kg LNG.

The efficiency of the Stirling plant is maintained by the rangeability of its modular design. The feed gas flow is quite often not stable and rangeability of the plant is therefore often a hard requirement. In case of a lower flow rate, a number of Stirling modules can be turned off which allows maintaining the energy efficiency of the plant.

High Uptime
The plants are supplied with a guaranteed high uptime of more than 8,400 hours per year. The modular design of the plants has the additional benefit that the plant becomes intrinsically redundant. If one of the modules has a technical issue, the others remain operational.

Other Features
Other features of the Stirling integrated gas purification & liquefaction plant:

• The methane/LNG will not be in contact with mechanical parts of the Stirling unit. Please refer to the explanation of the Stirling Cycle.
• Low operating pressures from 6 to 20 barg while delivering LNG product at low pressures (LNG at 2-4 barg or lower)
• Most efficient removal of non-condensable gases (N₂, O₂, H₂, etc.). Please refer to the explanation of the Stirling Cycle.
• Scalable for future growth (allows to grow/invest along with demand)

Markets

References