Heat Plant Class
| Description: | Heat processing plant e.g. burning fuels or converting electricity to heat |
| Detail: |
See also Heat Plant Property Reference for a detailed list of properties for this class of object.
Heat Plant is a special object that produces heat form burning the fuels, and/or recovers heat from Heat Input Nodes and/or converting electricity to heat. To the electrical network, heat plant is a load source (anti-generator). A Heat Plant connects to the electrical system via the Nodes and the heat system via Heat Output Nodes and/or Heat Input Nodes memberships.
Example: Modelling a Waste Heat Recovery Boiler (WHRB) that recovers waste heat from a Gas Turbine (GT) generator with heat top-up from a gas duct burner or electric boiler. Other special modelling requirements are:
- WHRB only operates when GT is online.
- Fuel consumption curve (heat rate) of the GT depends on the fuel-offtake level of the WHRB
- WHRB has a fuel consumption curve based on its operating points.
- WHRB consumes different amount of fuel during start-up based on its cooling state.
- WHRB has a start profile
- Other unit commitment requirements: Min Stable Level, Maximum ramping up and down in the heat production, Min Up time , etc
Figure 1: Heat Plant modelling
Modeling guide:
- Using Units Generating Coefficient to create a custom constraint such as: [UnitsGeneratingCoefficient]{WHRB} - [UnitsGeneratingCoefficient]{GT} =< 0
- Using condition Variables Fuel Offtake Coefficient to alter the heat rate properties of the GT.
- Using properties Load Point, Heat Rate, Heat Rate Incr
- Using properties Start Fuels Offtake at Start
- Using properties Run Up Rate or Start Profile
- Using properties Min Stable Level, Max Ramp Up, Max Ramp Down, etc
See also the Heat Modelling article for details.