Heat and Power Generation in Petro-SIM 6
Heat and Power System Modeling Capabilities
Petro-SIM now contains all unit operations required to effectively model heat and power utility systems, from deaerator to boiler, and steam header to desuperheater and multi-stage turbo-generator. Steam users, waste-heat boilers, and turbine drivers can be specified in a convenient tabular format, while the easy-to-use basic boiler complements the rigorous combination of burner plus steam generator. The gas turbine model is fully equipped to deal with part-load operation and varying atmospheric conditions.
The steam header model automatically opens or closes a vent, as the balance requires, and detects and removes any condensate formation. It automatically adjusts water injection to achieve a constant outlet temperature, or allows that temperature to vary freely according to inlet steam conditions. In Calibration mode, system heat and mass losses can be calculated and then trapped in any subsequent steam balancing exercises.
- The boiler model allows up to three different energy sources and different firing-efficiency correlations for each source.
- The turbo-generator model allows up to ten stages, including condensing, and can be set up with fixed or variable power production. It can be modelled with fixed stage efficiencies, or with Willans parameters to represent typical flow-dependent efficiency characteristics.
Gas Turbine Power Generation Modeling Capabilities
Gas turbines are the most efficient means of power generation, especially when configured in a combined cycle. Because their performance depends greatly on atmospheric conditions, rated efficiency cannot be taken for granted. Petro-SIM’s gas turbine model predicts full or partial-load performance under different atmospheric or fuel conditions. In refineries and other processes with significant heat requirements, overall cycle efficiency can be increased to beyond 90% in a cogeneration system, where gas turbine exhaust heat is recovered to make steam.
Petro-SIM’s heat recovery steam generator (HRSG) model, coupled with the gas turbine model can form a combined heat and power (CHP) system, with or without a burner for supplementary firing.