| CPC F01K 23/108 (2013.01) [F01K 23/10 (2013.01); F02C 3/22 (2013.01); F02C 6/18 (2013.01)] | 11 Claims |
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1. A combined power generation system comprising:
a gas turbine combusting fuel to generate rotational force;
a heat recovery steam generator (HRSG) configured to heat feedwater using combustion gases discharged from the gas turbine and having a high-pressure section, a medium-pressure section, and a low-pressure section having different pressure levels;
an ammonia decomposer for decomposing ammonia with the combustion gases discharged from the gas turbine;
a first exhaust gas line through which the exhaust gases discharged from the gas turbine are transferred to the HRSG;
a second exhaust gas line through which the exhaust gases discharged from the gas turbine are transferred to the ammonia decomposer;
a third exhaust gas line through which the exhaust gases discharged from the ammonia decomposer are transferred to the HRSG; and
a decomposed gas transfer tube connecting the ammonia decomposer and the combustor to transfer decomposed gases generated with the decomposition of ammonia to the combustor; wherein:
the first exhaust gas line is connected to the high-pressure section to supply the exhaust gases to the high-pressure section; and
a heat exchanger is installed on the second exhaust gas line to exchange heat between the exhaust gases flowing into the ammonia decomposer and the exhaust gases discharged from the ammonia decomposer.
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