Considering both technical and simplified economic considerations, this paper describes how gas turbines can be applied into service for either:
- Electrical Power Generation
- Mechanical Drive Application
For a starting point, in the Electrical Power Generation section, a BASE CASE for a typical industrial facility is described, illustrating the plant's existing electrical power usage, steam production and fuel usage profiles, without cogeneration.
Sequential examples, with illustrations and simplified calculations are then given, showing how a gas turbine generator (GTG) could be integrated into the BASE CASE facility, to ultimately save money. The examples progressively increase in complexity, flexibility, cost and efficiency, and include:
- GTG in Open Cycle Configuration
- GTG with Unfired HRSG
- GTG with Fired HRSG
- Small Combined-Cycle Cogeneration Plant
- Large Combined-Cycle Cogeneration Plant
In the Mechanical Power Applications section, the BASE CASE scenario is a typical utility pipeline gas compressor application using a mechanical drive gas turbine. Sequential examples are then given showing how combined-cycle using steam turbine generators could be applied to the typical plant.
The paper finishes with general discussions on turbine selection criteria, including turbine sizing considerations and aero-derivative vs. heavy-duty industrial comparisons.
*For an illustration of how a steam turbine generator could be integrated into the same BASE CASE facility, please refer to the Steam Turbine Applications© paper.