Water impurities impact in a steam injected gas turbine. Final report

This evaluation examines the impact of water impurities in a steam injected gas turbine. The various raw water and heat recovery boiler (HRB) constituents are examined, and discussed with respect to the most cost effective treatments required to eliminate corrosive and erosive attack on the HRB and gas turbine components. Because water treatment requirements are extremely site specific and must be developed in conjunction with each boiler application, the feedwater treatment and chemistry has been described for one low-solids freshwater, one brackish water and one seawater supply. The corrosion and deposition processes are discussed for the HRB and gas turbine and also for the various water treatment systems that are available.