Direct fired cogeneration
TIW WESTERN has the ability to design and manufacture a Once through Steam Generator utilizing the exhaust stream of a Gas Turbine Generator.
These units have all the design features of a "Direct Fired" OTSG but instead of a combustion air blower, they utilize the exhaust of a gas turbine as an air supply to the register style burner.
When compared to a "Direct Fired" OTSG, the GT-OTSG can improve both greenhouse gas emissions and reduce overall energy usage. Steam outputs are comparable with either design.
Using a register style burner, the OTSG can be designed to operate using the flue gas from a gas turbine as the combustion air source. The overall design of the OTSG is very similar to a direct fired unit less the supply of a forced draft fan. The oxygen rich flue gas from the gas turbine is directed to the burner where it is "re"-fired to single digit stack oxygen levels. The overall design of the OTSG is very similar to a direct fired unit less the supply of a forced draft fan.
The OTSG can be designed for a number of different gas turbine suppliers and outputs.
The optimum size range is in the sub-35 megawatt (MW) output. Scope of supply for this package is the same as for a direct fired unit, however gas turbine supply would be by the customer.