Abstract
Adding an exhaust gas heat recovery system to a gas turbine (GT) increases its overall power output and efficiency. The introduction of an Air Heat Recovery Turbine Unit (AHRTU) using air as the heat-transfer agent is one of the ways of this increasing. This article presents the results of a GT with AHRTU for a turbine inlet temperature range from 573K to 873K and a compressor pressure ratio from 2.5 to 12. Main component performance of the AHRTU, weight and size are determined and optimized to match gas turbines. The potential for use of GT with AHRTU is specified. Exhaust gas heat recovery using a GT with AHRTU enable 4%–6% increases in efficiency (absolute), and 12%–20% increases in power output of mechanical drive plants.
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