TEST RESULTS FROM THE ADVANCED HUMID AIR TURBINE SYSTEM PILOT PLANT - PART 1: OVERALL PERFORMANCE

摘要

The AHAT (advanced humid air turbine) system is based on a recuperated cycle using high-humidity air. This system improves thermal efficiency by using the high-humidity air as working gas.After many studies and elemental tests, a 4MW-class pilot plant was planned and built in order to verify feasibility of the AHAT system from the viewpoints of heat cycle characteristic and engineering. This plant consists of a gas turbine, a recuperator, a humidification tower, a water recovery system, an economizer, and other components. The gas turbine consists of a two-stage centrifugal compressor (pressure ratio of 8), a reverse-flow type single-can combustor, and a two-stage axial-flow turbine.In overall performance tests, the plant thermal efficiency exceeded 40%LHV.