Abstract
Humid air gas turbine systems that are regenerative cycle using humidified air can achieve higher thermal efficiency than that of the combined cycle (GTCC) though these systems don’t need steam turbine, high combustion temperature and high pressure ratio. Especially, the advanced humid air turbine (AHAT) is seemed to be near practical used because the composition is simpler than other systems. And the thermal efficiency difference of AHAT and GTCC grows by the small and medium-size gas turbine. To verify the system concept and cycle performance of AHAT, 3.6MW pilot plant was constructed. The plant consists of a gas turbine with a two-stage radial compressor, a two-stage axial turbine, a reverse-flow type of single-can combustor, a recuperator, a humidification tower, a water recovery tower, and other components. As a result of the running test, it has been confirmed the plan output 3.6MW and the validity of AHAT as a power generating system. In this study, the thermodynamic characteristic of the AHAT system is analyzed, and various characteristics are verified by the running test results of this AHAT pilot plant through the year.
