Integrated method of driving a CO2 compressor of a CO2-capture system using waste heat from an internal combustion engine on board a mobile source
AssigneeSaudi Arabian Oil Company
InventorsMourad Victor Younes, Esam Zaki Hamad
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Abstract
An integrated system and method for driving a CO2 compressor to densify CO2 captured from the exhaust gas stream of an internal combustion engine on board a mobile source of CO2 includes operating a turbine that is operatively connected to the power input or drive shaft of the CO2 compressor, and operatively connecting a motor-generator to the turbine for (a) recovery of any excess power when the turbine-generated power exceeds the CO2 compressor power demand and (b) providing supplemental power when the turbine-generated power is insufficient to meet the CO2 compressor power demand.
Claims11
A method of driving a CO2 compressor that forms part of a CO2 capture system on board a mobile source for recovery of CO2 from the exhaust gas stream of an ICE and its densification for storage on board the mobile source, the compressor having a drive shaft and a CO2 intake port, the method comprising the steps of:
- providing a turbine operated by a pressurized working fluid, the turbine having a power output shaft operatively connected to the drive shaft of the CO2 compressor for driving the CO2 compressor;
- heating the pressurized working fluid prior to its introduction into the turbine using waste heat produced on board the mobile source by heat exchange with heat-emitting components on board the mobile source;
- and
- providing a motor-generator operatively connected to the drive shaft of the CO2 compressor for recovering excess power when the turbine-generated power exceeds the CO2 compressor power demand, and for supplying supplemental power when the turbine-generated power is insufficient to meet the power demand of the CO2 compressor.
An integrated CO2 capture system on board a mobile source for the recovery of CO2 from the exhaust gas stream of a supercharged or turbo-charged internal combustion engine, the system comprising a CO2 compressor, an exhaust gas-driven turbine, a motor-generator, and an engine air compressor that are coaxially coupled to the same axle, and further comprising a CO2 storage unit in fluid communication with the CO2 compressor outlet and a battery operatively connected to the motor-generator to provide electrical energy when power is needed to drive the CO2 compressor and for storage of electrical energy when an excess of power is produced by the motor-generator.
Dependencies are inferred from the claim text.