Patent ID: 6829894
Filing Date: 2004-12-14
Classification: F01K,F22B

Abstract:
A device for generating mechanical work by means of a steam engine in a closed circuit, said closed circuit comprising in series a feed water tank, a feed pump, an evaporator, said steam engine and a condenser, said feed pump drawing water from said feed water tank and feeding this water to said evaporator, steam under pressure from said evaporator being fed as working medium to said steam engine, exhaust steam from said steam engine being condensed by said condenser and returned to said feed water tank, frost-sensitive parts of said closed circuit being prone to be damaged by frost, wherein said feed water tank is of frost resistant design, water in said feed water tank has a water surface, said feed water tank defining a gas space above said water surface, said gas space being filled with a gas, and further comprising means for expelling, by means of said gas, feed water from, at least, the frost-sensitive parts of the circuit and for pressing said expelled feed water into said frost resistant feed water tank.