A gas capture system includes a first heat exchanger that exchanges heat between cold heat of a fuel that is vaporizing and a first gas mixture to cool the first gas mixture, a first dehumidifier that dehumidifies the first gas mixture cooled through the first heat exchanger, a first compressor that presses the first gas mixture passing through the first dehumidifier, a first separation device that separates a second gas mixture including a reference gas from the pressed first gas mixture, and a liquefier that liquefies the reference gas to generate a reference liquid.

System and method for concentrating substance-containing fluids by multi-stage evaporation. System includes at least a first and a second evaporator, the first evaporator being connected to the second evaporator, whereby fluid concentrated in the first evaporator is conducted into the second evaporator to further concentrate fluid in the second evaporator, a first mechanically acting compressor unit, whereby vapor formed in the first evaporator is compressed downstream, and a second mechanically acting compressor unit, whereby vapor formed in the second evaporator is compressed downstream. System includes a first supply line supplying vapor compressed with the first mechanically acting compressor unit to the first evaporator. Vapor compressed by the second compressor unit is supplied to the first compressor unit. First and second compressor units include pluralities of compressors and vapor in the second compressor unit is compressed to a larger outlet temperature minus inlet temperature difference than in the first compressor unit.

A gas capture system includes a first heat exchanger that exchanges heat between cold heat of a fuel that is vaporizing and a first gas mixture to cool the first gas mixture, a first dehumidifier that dehumidifies the first gas mixture cooled through the first heat exchanger, a first compressor that presses the first gas mixture passing through the first dehumidifier, a first separation device that separates a second gas mixture including a reference gas from the pressed first gas mixture, and a liquefier that liquefies the reference gas to generate a reference liquid.