Abstract: The present invention is related to a multiple-inlet turbine casing (16) for a turbine rotor (60) which comprises a first fluid supply channel (70) configured to direct a first working fluid onto the turbine rotor (60) and a second fluid supply channel (74) configured to direct a second working fluid to impart torque on the turbine rotor (60) in the same direction as the direction in which torque is imparted on the turbine rotor (60) by the first working fluid. The first working fluid is an exhaust gas from an internal combustion engine and the second fluid may be steam and the turbine may be an inverted-Brayton-cycle turbine for recovery of waste energy from the exhaust gas of said internal combustion engine. Thus, the number of turbine rotors is reduced in comparison to a system comprising a single turbine for each distinct working fluid.

Abstract: An apparatus (2) includes an internal combustion engine (4) and an inverted Brayton cycle heat engine (6). Hot exhaust gas from the internal combustion engine (4) contains water. The hot exhaust gas drives the inverted Brayton cycle heat engine. A condenser (22) in a fluid path of the exhaust gas between an inverted-Brayton-cycle turbine and an inverted-Brayton-cycle compressor condenses at least some of the water from the exhaust gas to form condensed water. This condensed water follows a recirculation path (30) so as to be re-introduced as a working fluid into one or more of the heat engines described above, or further heat engines, e.g. the condensed water is heated by the exhaust gas using a steam-generating heat exchanger (20) to generate steam which drives a steam turbine (32).

Abstract: The present invention is related to a multiple-inlet turbine casing (16) for a turbine rotor (60) which comprises a first fluid supply channel (70) configured to direct a first working fluid onto the turbine rotor (60) and a second fluid supply channel (74) configured to direct a second working fluid to impart torque on the turbine rotor (60) in the same direction as the direction in which torque is imparted on the turbine rotor (60) by the first working fluid. The first working fluid is an exhaust gas from an internal combustion engine and the second fluid may be steam and the turbine may be an inverted-Brayton-cycle turbine for recovery of waste energy from the exhaust gas of said internal combustion engine. Thus, the number of turbine rotors is reduced in comparison to a system comprising a single turbine for each distinct working fluid.

Abstract: An apparatus (2) includes an internal combustion engine (4) and an inverted Brayton cycle heat engine (6). Hot exhaust gas from the internal combustion engine (4) contains water. The hot exhaust gas drives the inverted Brayton cycle heat engine. A condenser (22) in a fluid path of the exhaust gas between an inverted-Brayton-cycle turbine and an inverted-Brayton-cycle compressor condenses at least some of the water from the exhaust gas to form condensed water. This condensed water follows a recirculation path (30) so as to be re-introduced as a working fluid into one or more of the heat engines described above, or further heat engines, e.g. the condensed water is heated by the exhaust gas using a steam-generating heat exchanger (20) to generate steam which drives a steam turbine (32).