Which cogeneration system uses exhaust gases to drive a gas turbine connected to an electrical generator?

The cogeneration system that utilizes exhaust gases to drive a gas turbine connected to an electrical generator is referred to as a combined-cycle gas/steam turbine system. This type of system is designed to improve overall efficiency by combining two different types of energy generation.

In a combined-cycle gas/steam turbine system, a gas turbine generates electricity while producing hot exhaust gases as a byproduct. These gases are then directed to a heat recovery steam generator (HRSG), where they are used to produce steam. The steam produced can then drive a steam turbine, which generates additional electricity. This dual process maximizes the energy extracted from the fuel used, making it highly efficient and reducing waste heat.

The design and function of this system exemplify the principles of cogeneration, where both electrical and thermal energy are produced from a single fuel source, optimizing resource usage and increasing overall system efficiency.