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LNG SOLUTIONSThe biogas liquefaction plant was delivered to the municipality of Oslo. Forthis plant, Wärtsilä has developed and delivered a CO 2 mole sieve cleaningstage.• Wärtsilä LNG Mini Scale LiquefactionMIXED REFRIGERANT (MR) PROCESS – THE PERFECT SOLUTIONFOR BIOGAS LIQUEFACTIONWärtsilä offers the energy efficient Mixed Refrigerant (MR)liquefaction technology for low liquefaction capacities. Togetherwith our fast track engineering model, this technology results in lowinvestment costs and short manufacturing time.The liquefier system uses mixed refrigerant technology, where onesingle MR compressor and one aluminium plate-fin heat exchanger(PFX) are the main components in the system. A standard glycol chiller(pre-cooling unit) is incorporated to improve energy efficiency and toensure stable operation of the MR process.Main Technical data:• Energy consumption: ~ 0.7 kWh/kg LNG• Capacities up to 50 tons/day• Based on Mixed Refrigerant technology• Designed for unmanned operation• Space requirement for liquefaction system: 15 x 15 m 2• Delivery time: 12 months• Standard capacities: 10, 17.5 and 25 ton LNG/day.111