Energy efficiency of the liquefied natural gas regasification in a turboexpander was calcd. for 2 typical gas compns. and gas flow (70-210).10(3) m(3)/h, under 10-15 MPa. Thermodynamic anal. of the expansion showed a possibility to produce more than 1 GW for the lowest gas flow and pressure. The discounted payback period on investment for the parameters was however longer than 10 years.