The Eclipse FlueFire is specially designed for supplemental firing of cogeneration and combined-cycle installations. In power generation stations, the exhaust gases from gas turbines contain a significant quantity of energy in the form of heat. This energy can be used either directly in heating processes or to generate steam, which can again drive steam turbines to generate more electricity.

When the heat requirement is greater than that available from the turbine exhaust gases, supplementary firing can be applied. Eclipse has designed the FlueFire burner specifically for this purpose. It is an in-duct burner which can be located directly in the exhaust gases between the turbine and waste heat boiler. The burner is also suitable for fresh air operation or incineration applications.