US 12,448,917 B2
Combined heat and power system using and producing CO2 and method of operation
Ricardo Conde, New Salem, MA (US)
Filed by Enexor BioEnergy, LLC, Franklin, TN (US)
Filed on Jul. 1, 2024, as Appl. No. 18/760,805.
Application 18/760,805 is a continuation of application No. 18/203,973, filed on May 31, 2023, granted, now 12,044,166.
Prior Publication US 2024/0401522 A1, Dec. 5, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F02C 3/34 (2006.01); F02C 3/26 (2006.01); F02C 3/28 (2006.01); F02C 3/30 (2006.01); F02C 7/232 (2006.01)
CPC F02C 3/34 (2013.01) [F02C 3/26 (2013.01); F02C 3/28 (2013.01); F02C 3/30 (2013.01); F02C 7/232 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A combined heat and power (CHP) system, the CHP system comprising:
an oxygen-air separation device;
a combustion system having a combustion chamber and a solid fuel feed mechanism, the combustion chamber having an gas inlet and an output conduit, the gas inlet being fluidly coupled to the oxygen-air separation device, the combustion chamber configured to generate a CO2 exhaust gas that substantially comprises CO2 gas;
a first proportional valve fluidly coupled to the gas inlet and configured to control a flow of expanded heated CO2 working gas to the gas inlet, the expanded heated CO2 working gas comprising at least a portion of the CO2 exhaust gas;
an exhaust plenum operatively connected to the combustion chamber;
a high temperature heat exchanger operably coupled to the exhaust plenum and fluidly coupled to receive CO2 exhaust gas therefrom and output a cooled CO2 working gas, the high temperature heat exchanger transferring heat from the combustion gases to a compressed CO2 working gas;
a gas turbine having a compression section and an expansion section operably connected on a drive shaft, the compression section receiving the cooled CO2 working gas at an inlet and compress the cooled CO2 working gas, the compression section also flowing the compressed CO2 working gas to an inlet of the high temperature heat exchanger, the gas turbine receiving a heated CO2 working gas at an inlet to the expansion section and expanding the heated CO2 working gas and generate work therefrom.