METHOD FOR RECOVERING HEAT DISSIPATED BY AN INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a method for recovering heat dissipated by an internal combustion engine (2). Said method comprises the following steps: a liquid working medium (A) is compressed from a lower process pressure (pu) and a first temperature (T1) to an upper process pressure (po) and a second temperature (T2) by means of a delivery unit (3); the working medium (A) is heated from the second temperature (T2) to a third temperature (T3) in a heat exchanger (4) by transferring heat from a hot medium containing heat dissipated by the internal combustion engine (2) to the working medium (A), which is converted from a liquid phase into a gaseous phase; the working medium (A) is expanded at least approximately to the lower process pressure (pu) and to a fourth temperature (T4) in an expansion device (5) from which mechanical power can be tapped; the working medium (A) is converted from a gaseous phase into a liquid phase in a condenser (6); and the working medium (A) is transferred to the delivery unit (3). According to the invention, the upper process pressure (po) is adjusted in such a way in a range of operation of the internal combustion engine (2) that the working medium (A) is expanded at least approximately to a saturated steam limit (S) in the expansion device (5). The invention further relates to an internal combustion engine for carrying out said method.