The liquefaction system consumes about 850 kW. The input gas is 707 MSCFD, which is equivalent to 565 kg/h. The output is 6000 GPD, which is equivalent to 387 kg/h.
So the LNGo liquefaction power is about 850 / 387 = 2.2 kWh/kg, which is a lot higher than the large scale LNG plant. For large scale LNG plant liquefaction power calculation, please refer to http://showcase.guofuchen.com/2014/01/lng-liquefaction-power-calculation.html
In addition, the LNGo system burns about (565 - 387) = 178 kg/h natural gas to produce 850 kW electricity. Giving 50 MJ/kg lower heating value (LHV) of natural gas, 178 kg/h is equivalent to about 2474 kW heating value. This means the conversion efficiency from natural gas to kW is about 850 / 2474 = 34%, which is a typical efficiency for small scale engine.
What's more, with a total of 565 kg/h feed gas, 387 kg/h is turned into liquid. With this said, 68.5% of feed gas is liquefied and the rest 31.5% is used as fuel gas and other purposes. To make it simple, 2/3 of gas is turned into liquid and 1/3 gas is burned as fuel to liquefy the 2/3 LNG for LNGo.
What's more, with a total of 565 kg/h feed gas, 387 kg/h is turned into liquid. With this said, 68.5% of feed gas is liquefied and the rest 31.5% is used as fuel gas and other purposes. To make it simple, 2/3 of gas is turned into liquid and 1/3 gas is burned as fuel to liquefy the 2/3 LNG for LNGo.
More information about LNGo can be found at http://www.dresser-rand.com/literature/general/2336_LNGo_01312014.pdf
