Regasification is a process of converting liquefied natural gas into the gaseous state using the ambient energy (temperature) in evaporation flow systems. No special heating medium is used there. LNG is heated in atmospheric heat exchangers (evaporators) with gas released at a temperature that is 15 to 20°C below the ambient temperature. In motor vehicles LNG is only used in a gaseous state. LNG storage and transportation tanks are Dewar vessels securing the minimum heat supply and operating at the pressure varying from 0.3 to 1.6 MPa.