Alph is no longer for sale.

I am afraid revenue generated from Alph has not proven to be sufficient to justify its continued sale. I greatly appreciate the support of the folks who have purchased Alph in the past and hope that it will continue to serve you well in the future.

This and related pages will be maintained for archival purposes only.

Craig


Alph Case Study Example

This example illustrates a very simple use of the Case Study Tool record properties of a flashed fluid for a range of temperatures. See the more detailed description.

Loading this case into Alph

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{
 "SelectedFluidIndex" : 0,
 "PropPkg" : "APRNGL",
 "Tools" : [
   {
     "xtype" : "T",
     "nPoints" : 30,
     "DiagramX" : 109.3333,
     "Y0" : "@feed.l.x:\"propane\" ' C3_Fraction",
     "Y1" : "@feed.l.x:\"propane\" * @feed.l.f. ' C3_Flow",
     "ytype1" : "F",
     "name" : "casestudy",
     "Notes" : "Varies the @feed temperature from -60 to 85 C, while recording the liquid propane mole fraction, propane flow rate and viscosity.",
     "X" : "-60 + #.i *5 ' Feed_T",
     "ytype2" : "Viscosity",
     "ytype0" : "Vf",
     "Type" : "Case Study",
     "Y2" : "@feed.l.viscosity ' Liq_Viscosity",
     "DiagramY" : 65.33334
   }
 ],
 "diagramX" : -5.898699,
 "SelectedToolIndex" : 0,
 "Program" : "Alph",
 "NextFluidNumber" : 1,
 "Fluids" : [
   {
     "FlowFormula" : "10 mmscfd",
     "SumCompForFlow" : false,
     "DiagramX" : 21.33333,
     "FirstPropType" : "T",
     "SecondPropType" : "P",
     "CompFormula" : "[ 70,20,10,9,8,7,6,5 ]",
     "FirstPropFormula" : "#casestudy.x",
     "Retrograde" : false,
     "TwoLiquids" : false,
     "SecondPropFormula" : "4000 kPa",
     "name" : "feed",
     "Notes" : "Our standard tutorial feed fluid, but with the temperature being determined by the casestudy tool's x value.",
     "Type" : "F",
     "DiagramY" : 23.66667
   }
 ],
 "Hypotheticals" : [],
 "diagramY" : -8.267899,
 "CompoundNames" : [
   "METHANE",
   "ETHANE",
   "PROPANE",
   "n-BUTANE",
   "n-PENTANE",
   "n-HEXANE",
   "n-HEPTANE",
   "n-OCTANE"
 ],
 "Notes" : "This example demonstrates the use of the case study tool, by varying the temperature of the fluid and recording the resulting properties of its liquid phase.  While only a single fluid is involved here, the recorded properties could be the result of calculations involving any number of fluids and tools.",
 "Variables" : [],
 "CaseName" : "case study example",
 "CurrentUnitSet" : 1,
 "NextVariableNumber" : 1,
 "Version" : 1.42,
 "diagramScale" : 2.998274,
 "DisplayedProperties" : {
   "-4" : "y",
   "8" : "y",
   "-2" : "y",
   "-1" : "y",
   "10001" : "y",
   "-6" : "y",
   "9" : "y"
 }
}