Patent ID: 7730727

Claim:
A method for generating heat energy, comprising: a) operating a cogeneration system in a first mode in which a gas turbine engine is operated to produce energy, wherein the operation in the first mode comprises: i) flowing an exhaust of the gas turbine engine over a plurality of flow control members located in a main exhaust duct of the cogeneration system; wherein each of the plurality of flow control members is a wing-shaped member having a pair of plates disposed on opposite sides of the wing-shaped member and actuatable between a closed configuration and an open configuration in which the plates are rotated into a flow pathway defined by the main exhaust duct and form an air outlet volume; wherein the flow control devices are in the closed configuration while the cogeneration system operates in the first mode; and b) operating the cogeneration system in a second mode in which the gas turbine engine is disabled and a steam generation system operates to generate energy, wherein the operation in the second mode comprises: i) actuating the flow control members to the open configuration; and ii) flowing air into an axially disposed fluid passageway formed in each respective flow control member; wherein the axially disposed fluid passageways are in fluid communication with the respective air outlet volumes, whereby air is expelled from the respective flow control members into the main exhaust duct.