Integrated method of driving a CO₂compressor of a CO₂-capture system using waste heat from an internal combustion engine on board a mobile source

摘要

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.

主权项

1. 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.