Liquefied Natural Gas (LNG) is always more and more used as alternative fuel for heavy-duty vehicles because it is more environmentally friendly than traditional fossil fuels. LNG is stored in cryogenic vessels within the truck and is vaporized before it can be used to supply the engine.

Objective of this paper is to evaluate the thermodynamic performance of an innovative system aiming at recovering the cold thermal energy from the LNG vaporization. The cold energy obtained can be used for different applications onboard: cooling of engine intake air, vehicle air-conditioning or refrigeration purposes.

A thermodynamic analysis of the system proposed is illustrated under different operating conditions and the impact on the overall LNG fueled truck performance is discussed.