讲义aspen教程htfs培训input

1、Specifying the Input DataMain Data Requirements (1)GeometricDesign ModeShell typeMaximum shells in series/parallelMaximum shell diameterTube o.d., wall thickness, pitch, layoutTube materialMaximum, minimum tube length; incrementMaximum, minimum number of tube passesChecking/Simulation modesFull geom

2、etrical details - use defaults where possibleMain Data Requirements (2)Process DataMass flowrateInlet/outlet temperaturesInlet pressuresFouling resistancesDesign modeAllowable pressure dropsChecking/Simulation modesEstimated pressure dropsMain Data Requirements (3)Fluid Properties - OptionsInput the

3、 properties of the mixture, obtained from another source, e.g. process simulator (preferred method for most fluid mixtures)Input individual component properties, and use VLE in TASC to calculate the properties of the mixtureSources of COMPONENT Property DataDirect input of property dataAccess data f

4、rom a bank of property data which has been set up previouslyAccess data from databank(s)NEL40(40 components, built into programs)DIPPR(1350 components, PC only)PPDS(900 components, mainframe only) mended Practice for Physical Property Data InputPure componentuse direct input of pure component dataac

5、cess data from databankMixtureinput data directly or from a User Databankimport data from a process simulator via .PSF file (in above two options, ALWAYS include dew/bubble points if they are in the temperature range)Advanced Physical Property Input OptionsSpecify stream data at two or more pressure

6、sGet effects of pressure dependence if data are given at only one pressure Force calculated stream data to fit dew point / bubble pointSpecify temperatures at which stream data are calculatedInput stream compressibility instead of vapour density (enter negative values on line 332)Features of Calculated Stream PropertiesPressure level default from host program (or specify more than one)Temperature rangedefault from stream inlet temperaturesneed not match inlet / outlet temperatures12 points calculatedat selected temperatures in rangebubble / dew point