公开(公告)号：US20220158203A1

公开(公告)日：2022-05-19

申请号：US17441260

申请日：2020-03-18

申请人： Intelligent Energy Limited

发明人： Rama Pratap

IPC分类号： H01M8/04014 ,  H01M8/04029 ,  H01M8/04111 ,  H01M8/0432 ,  H01M8/04746

摘要： The present disclosure provides methods for turbine-based energy recovery from exhaust streams in fuel cell systems. The fuel cell systems can include an expansion turbine (200) arranged to capture electrical energy from cathode exhaust streams. The cathode exhaust streams (151a, 151b, 151c) can be flowed through an intercooler (250) to be preheated prior to entering the expansion turbine (200), with heat added by transferring heat from a compressed air flow. The methods can include operating the fuel cell system in a temperature-boost mode that includes reducing fan operation related to a condenser to reduce liquid recapture from an exhaust stream and increase exhaust stream temperature for use in turbine-based energy recovery. The temperature-boost mode can be controlled to limit the operation time based on coolant fluid levels in the fuel cell system.

公开(公告)号：US11735749B2

公开(公告)日：2023-08-22

申请号：US17441260

申请日：2020-03-18

申请人： Intelligent Energy Limited

发明人： Rama Pratap

IPC分类号： H01M8/04 ,  H01M8/04014 ,  H01M8/04029 ,  H01M8/04111 ,  H01M8/0432 ,  H01M8/04746

CPC分类号： H01M8/04022 ,  H01M8/04029 ,  H01M8/04111 ,  H01M8/04373 ,  H01M8/04776

摘要： The present disclosure provides methods for turbine-based energy recovery from exhaust streams in fuel cell systems. The fuel cell systems can include an expansion turbine (200) arranged to capture electrical energy from cathode exhaust streams. The cathode exhaust streams (151a, 151b, 151c) can be flowed through an intercooler (250) to be preheated prior to entering the expansion turbine (200), with heat added by transferring heat from a compressed air flow. The methods can include operating the fuel cell system in a temperature-boost mode that includes reducing fan operation related to a condenser to reduce liquid recapture from an exhaust stream and increase exhaust stream temperature for use in turbine-based energy recovery. The temperature-boost mode can be controlled to limit the operation time based on coolant fluid levels in the fuel cell system.