For More Information on the HCOALGEN Model
Aspen Plus uses component attributes to represent nonconventional components in terms of a set of identifiable constituents needed to calculate physical properties. HCOALGEN uses the proximate analysis, ultimate analysis, and sulfur analysis to calculate the enthalpy of coal.
The Option code value fields define how the HCOALGEN model calculates the heat of combustion, the standard heat of formation, the heat capacity, and the enthalpy basis for coal.
2In the toolbar, click 
.
3Click the Model name field for Enthalpy where you have selected HCOALGEN.
A small help window appears with the message: "Coal enthalpy model. Based on the Option code values entered, component attributes Ultanal, Sulfanal, and Proxanal may be required. For details see Coal enthalpy."
4From the help window, click the Coal enthalpy hypertext link.
A larger help window appears, providing information on HCOALGEN, the General Coal Enthalpy Model.
5Use the vertical scrollbar to access the HCOALGEN Option Codes table.
The help defines what each option code value means and the calculation methods available.
The calculation methods represented by the option code value defaults of 1 1 1 1 are acceptable for this simulation.
6Click 
in the top right corner to close the help window.
7In the Model name field for Density, click 
and select DCOALIGT.
2-10 • Modeling Coal Drying |
Getting Started - Solids |
The Property Methods sheet is complete:
8Click 
to continue.
The Required Properties Input Complete dialog box appears:
Correct representation of physical properties is an essential component of process modeling. For many simulations, the only physical property specification that you must provide is the selection of a property method. The Required Properties Input Complete dialog box shows that the Aspen Plus physical property system has many optional capabilities that you can use to increase the accuracy of physical property calculations.
9 Click OK to continue.
Getting Started - Solids |
Modeling Coal Drying • 2-11 |