Method for increasing the efficiency of all thermal engines, characterised in that the produced thermal energy is converted in to mechanical energy up to a temperature lower than 100 C.

The method involves converting the generated heat energy up to 100 deg. C into mechanically usable energy. The method operates via one or more heat exchangers using a liquid that vaporizes at 0 deg. C and produces a usable gas pressure at 100 to 120 deg.C.