IECM 12.0 beta User Manual > Modules Included with the IECM > Common Input and Result Screens > Fuels > Coal / Biomass / Waste Coal Properties >

Proximate Analysis

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Some screens deal with the proximate analysis of coal, biomass, or waste coal. Proximate analysis data is currently only displayed and used by PC plants, although the fuel database lookup for IGCC plants will also show it and allow you to save it. (PC plants currently use it to improve the boiler efficiency calculation.)

In some cases, proximate analysis data may not be available. Proximate Analysis parameter screens provide a "Proximate Analysis available?" parameter to allow you to indicate whether you have proximate analysis data. If you choose Yes , the following properties are displayed:

•Values from Fuel Properties: The following values are taken from the fuel properties screen.

•Moisture: This is the weight percent of moisture in the fuel on a wet basis.

•Ash: This is the weight percent of ash in the fuel on a wet basis.

•Volatile Matter: This is the weight percent of volatile matter in the fuel on a wet basis. This is the only value which can be edited on parameter screens.

•Fixed Carbon: This is the weight percent of fixed carbon in the fuel on a wet basis. This value is calculated by subtracting the above values from 100%.