Steam
Product tab
The steam boiler library members contain the following input field options:
Nominal Heating Capacity
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Default: Autosize
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Typical Range: Autosize
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Min Max: 0 to 1,000,000,000,000,000
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Units: Btuh, kW, MBh, tons, W
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This numeric field contains the nominal operating capacity of the boiler.
Full Load Efficiency
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Default: 90%
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Typical Range: N/A
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Min Max: 0 to 100%
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Units: %
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This numeric field contains the full load efficiency of the boiler.
Fuel Type
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Default: Electricity
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Typical Range: N/A
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Min Max: N/A
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Units: Electricity, Diesel, Gasoline, NaturalGas, Coal, PropaneGas, FuelOil1, FuelOil2
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This field specifies the type of fuel used by the boiler for energy and economics analysis.
Optimum Part Load Ratio
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Default: 100%
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Typical Range: N/A
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Min Max: 0 to 100%
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Units: %
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This numeric field contains the boiler optimum part load ratio. Note this is the part load ratio at which the boiler performs at its maximum efficiency.
Sizing Factor
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Default: 100%
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Typical Range: N/A
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Min Max: 0 to 1,000,000,000,000,000%
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Units: %
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This numeric field contains the sizing factor for the boiler. The sizing factor field is used when the design inputs are set to Auto Sized, where the calculations are performed as usual, but the results are multiplied by the specified sizing factor. This allows for users to size components to meet part of the design load, but also use the autosize feature.
Design Steam Conditions
Design Leaving Steam Temperature
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Default: 239°F / 115°C
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Typical Range: N/A
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Min Max: -1,000,000,000,000,000 to 1,000,000,000,000,000
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Units: °F/°C
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Design Pressure
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Default: 150 psig / 1034.10 kPa
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Typical Range: N/A
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Min Max: -1,000,000,000,000,000 to 1,000,000,000,000,000
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Units: psig, ftH2O, kPa, Pa
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This numeric field contains the maximum design pressure at which the boiler operates.
Curve tab
The steam boiler curves contain the following input field options:
Curve Type
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Default: Quadratic
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Typical Range: N/A
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Min Max: N/A
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Units: %
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Curve type associated with the equipment.
Load (Cycle Point)
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Default: 100
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Typical Range: N/A
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Min Max: 0 to 100
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Units: %
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Represents the percentage (%) of full load capacity at which the equipment will turn on and off (cycle) to satisfy the load.
Coefficient 1
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Default: 1
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Typical Range: N/A
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Min Max: N/A
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Units: N/A
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Default for a quadratic curve type is one.
Coefficient 2
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Default: 0
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Typical Range: N/A
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Min Max: N/A
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Units: N/A
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May vary with library member.
Coefficient 3
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Default: 0
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Typical Range: N/A
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Min Max: N/A
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Units: N/A
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May vary with library member