DEVELOPMENT OF GAS-TURBINE STEAM INJECTION WATER RECOVERY (SIWR) SYSTEM

This paper describes and discusses a ''closed-loop'' steam injection w ater recovery (SIWR) cycle that was developed for steam-injected gas t urbine applications. This process is needed to support gas turbine ste am injection especially in areas where water cannot be wasted and comp lex water treatment is discouraged. The development of the SIWR was in itiated by NOVA in an effort to reduce the environmental impact of ope rating gas turbines and to find suitable solutions for its expanding g as transmission system to meet future air emission restrictions. While turbine steam injection provides many benefits, it has not been consi dered for remote, less supported environments such as gas transmission applications due to its high wafer consumption. The SIWR process can alleviate this problem regardless of the amount of injection required. The paper also covers conceptual designs of a prototype SIWR system o n a small gas turbine unit. However, because of relatively high costs, it is generally believed that the system is more attractive to larger size turbines and especially when it is used in conjunction with coge neration or combined cycle applications.