© 2021 Jasper van Baten, AmsterCHEM

capeOverallProperty

capeOverallProperty performs a thermodynamic equilibrium calculation at specified conditions, and calculates an overall property by summation over the phases at equilibrium. As overall properties are generally extensive, capeOverallProperty generally will return a scalar value.

For the unit of measure of an overall property, use capePropertyUnit.

Feed streams are already flashed. So instead of using capeOverallProperty at feed conditions, use capeOverallFeedProperty.

Syntax:

=capeOverallProperty(propName, specProp1, specValue1, specProp2, specValue2, moleFraction)

Arguments:

propName Name of the property. For a list of available overall properties, click the Overall Properties button on the control sheet. Derivatives for overall properties are not supported.
specProp1 Property for first flash specification. For a list of valid flash specifications, click the Flash Specifications button on the control sheet. In addition to all overall properties, properties Pressure and Temperature can be used as flash specification, as well as special property vaporfraction (molar phase fraction of the vapor phase).
specValue1 Value of the first flash specification property.
specProp2 Property for second flash specification.
specValue2 Value of the second flash specification property.
moleFractions Overall composition for which to calculate the equilibrium; number of values must correspond to the number of compounds. Composition must be normalized.

Example:

=capeOverallProperty("volume","enthalpy", 21365.7, "pressure", 1e5, F3:F4)

This function can be inserted by clicking the Overall Property Overall Property button on the Unit Operation ribbon.

INDEX
add-In
aggregation state
available properties
capeCompoundConstant
capePropertyUnit
capeFlash
capeFlashedFeed
capeOverallFeedProperty
capeOverallProperty
capePDependentProperty
capeSinglePhaseProperty
capeCompoundNames
compound names
unit of measure
capeStateOfAggregation
capeTDependentProperty
capeTwoPhaseProperty
capeUnitOperationName
compound constants
control sheet
defined phases
Disclaimer
equilibrium calculations
examples
Excel solver
Export Model
feeds
flash calculations
getting started
Import Model
input parameters
Loading and storing models
macros
output parameters
overall properties
parameters
ports
pressure dependent properties
products
property calculations
quick reference
reports
requirements
run-time error
security
single phase properties
solver
state of aggregation
streams
temperature dependent properties
thermodynamic equilibrium calculations
thermodynamic property calculations
two-phase properties
unit operation name
Update links
validation
VBA
welcome
CONTENT
 Introduction
 Ports and streams
 Parameters
 Function reference
 capeUnitOperationName
 capeStateOfAggregation
 capeCompoundConstant
 capePropertyUnit
 capeCompoundNames
 capeTDependentProperty
 capePDependentProperty
 capeSinglePhaseProperty
 capeTwoPhaseProperty
 capeFlash
 capeFlashedFeed
 capeOverallProperty
 capeOverallFeedProperty
 The control sheet
 Using the Excel solver
 Using Macros
 Loading and storing models
 Persistence in AspenPlus
 Examples
 Disclaimer