GTI

The main advantages of the steam injection process are:

a) Power Augmentation

The power increase can be realized independent of ambient conditions (temperature or humidity). The power augmentation process will increase power in all climates and at all times of the year.

• up to 18% increased power output
• reduced fuel consumption and improved plant heat rate

Steam injection can increase power output by approximately 17.5% for all ambient conditions (independent of temperature, humidy, etc.).

b) Emission Reduction

Power augmentation results in greatly increased NOx reductions. The injected steam reduces the flame temperature thereby reducing NOx emissions. This NOx credit then becomes a tradable commodity for many plant operators.

• up to 80% reduction in non abated NOx emissions
• reduced CO emissionsT

c) Both Power Augmentation and Emission Reduction

• up to 18% increased power output
• reduced fuel consumption and improved plant heat rate
• up to 80% reduction in non abated NOx emissions
• reduced CO emissions

GTI delivers one of the lowest cost per kW* for incremental power, especially when considering the higher capital and installation cost of building a larger plant.

Gas Turbine Injection has been proven to be a highly reliable method of improving gas turbine performance.

This process consists of injecting steam into the head end of the combustor of gas turbines, reducing unabated NOx emissions; and into the compressor discharge, increasing mass flow and power output.
Gas turbines generally are designed to allow up to 5% of the compressor airflow with flows as high as 10% allowed on some gas turbines. The injected steam contains at least 50 F (28 C) of superheat and will be at pressures comparable to fuel gas pressures. A steam injection flow of 5% of total exhaust flow will increase power output by approximately 17.5% for all ambient conditions, completely independent of temperature and humidity while drastically reducing unabated NOx levels.

IST’s Once Through Steam Generator (OTSG) technology complements Gas Turbine Injection applications with high reliability and low maintenance PLUS full gas turbine temperature dry run capability, one of the best overall ROI, lifecycle cost and superior constructability benefits(ease of installation).

*The typical turnkey cost inclusive of all auxiliary equipment for GTI applications is approximately $250USD/kW. Contact your IST sales representative for more information on this application.

Steam is injected directly into the gas turbine as a means to increase power, reduce fuel, control NOx emissions or to cool the turbine blades. This type of OTSG application allows for increased power production.