公开(公告)号：US11719156B2

公开(公告)日：2023-08-08

申请号：US17677006

申请日：2022-02-22

申请人： DOOSAN ENERBILITY CO., LTD.

发明人： Byoung Gu Bak ,  Song Hun Cha ,  Sung Gju Kang ,  Hong Geun Ha

IPC分类号： F02C6/18 ,  F02C7/12 ,  F02C7/224 ,  F02C7/141 ,  F01K23/10

CPC分类号： F02C6/18 ,  F01K23/10 ,  F02C7/12 ,  F02C7/141 ,  F02C7/224

摘要： A combined power generation system is provided. The combined power generation system includes a gas turbine configured to combust fuel to generate a rotational force, a heat recovery steam generator (HRSG) configured to heat feedwater using combustion gas discharged from the gas turbine and include a high-pressure section, a medium-pressure section, and a low-pressure section with different pressure levels, a fuel preheater configured to heat the fuel supplied to the gas turbine and include a primary heating part and a secondary heating part, and a high-pressure feedwater supply pipe connected to the high-pressure section to supply high-pressure feedwater to the secondary heating part.