Patent ID: 9650955
Date: 2017-05-16
CPC Classifications: F02C

Claim:
1. A system, comprising: a multi-fuel gas turbine configured to operate on both a liquid fuel system and a gas fuel system, wherein the multi-fuel gas turbine comprises a compressor, a combustor, and a turbine; and a gas fuel purge system configured to purge a gas fuel circuit of the gas fuel system during liquid fuel operation of the gas turbine, wherein a controller is configured to control the gas fuel purge system to sequentially purge the gas fuel circuit initially with air by flowing the air through a gas manifold of the gas fuel circuit into the combustor prior to meeting a steam injection permissive threshold of temperature and subsequently, upon meeting the steam injection permissive threshold, purge the gas fuel circuit with steam by flowing the steam through the gas manifold into the combustor.