CHEMCAD V.6 Support

CHEMCAD New Features and Enhancements

• Improved flash convergence in the critical region for equations of state (5590)
• Added an option to allow negative head/pressure in a performance curve for a Compressor UnitOp (5633)

CC-THERM

• Corrected an issue with plate and frame heat exchangers that caused miscalculation of effective area (5547)

CHEMCAD Maintenance

• Corrected an issue where a second instance of Excel could be opened in the background by the Data Map feature (5110)
• Restored certain VBA functions (DefineStreamInCurUserUnit, GetStreamInInternalUnit, GetStreamInCurUserUnit,
• DefineStreamInInternalUnit, GetCurUserUnitString, PutStreamInCurUserUnitByID, GetStreamInCurUserUnitByID) to their pre-CHEMCAD 6.5.5 behavior, and added new functions (define_stream_current_engineering_units, get_stream_fixed_engineering_units, get_stream_current_engineering_units, define_stream_fixed_engineering_units, get_current_engineering_unit_labels, set_stream_current_engineering_units, get_stream_current_engineering_units) to the Stream and Engineering Unit interfaces (5553)
• Corrected an issue with relief device sizing calculating incorrect vessel volume when different heads are selected (5622)

CHEMCAD New Features and Enhancements

• Added the capability to send stream relative humidity data using Excel Data Map (5440)

CC-DYNAMICS

• Corrected an issue where a compressor with multiple performance curves did not work properly in a dynamics simulation (5469)

CHEMCAD Maintenance

• Corrected an issue that could cause a user to lose a SuperProNet or RMS server license while using CHEMCAD (5257/5456/5465)
• Improved the CHEMCAD installation routine to ensure that drivers for licensing dongles on Windows 64-bit systems are properly updated during installation (5457)
• Corrected an issue where CHEMCAD could become non-responsive if closed while holding licenses from a License Manager server (5484)

CHEMCAD New Features and Enhancements

• Removed VSTA and VBA 6.5, and implemented VBA 7.1 (4556, 4925, 5367)
• Simplified the .msi and .exe CHEMCAD installation process (1727, 2243, 3586, 3589, 3908, 4469, 4480, 4793)
• Implemented Schultes 1999 as a new packing method for mass transfer column sizing and rating (4166)
• Improved the enthaply calcuation for high-temperature, low-pressure water properties (5417)

CHEMCAD Maintenance

• Corrected an issue with mass balance in the Solid Washer UnitOp (5250)
• Corrected an issue with incorrect reporting units for slurry density (5338/5339)
• Corrected an issue with Excel reports failing to separate columns of data (5348)
• Corrected an issue with the VBA command PutStreamInCurUserUnitByID (5375)

CHEMCAD New Features and Enhancements

• Replaced ASME steam table used in CHEMCAD with the IAPWS-IF97 standard, and made this standard the default (980/5121/5191)
• Improved Gibbs reactor calculations for liquid reactions to include activity coefficients (5282)
• Changed the behavior of the CHEMCAD License Manager so that it lists expired product licenses as well as available and held licenses (5058)
• Improved the flash algorithm for display of non-feed pure component streams (5293)
• Improved the flash algorithm for true species at dew point (5344)
• Improved convergence for equilibrium reactors (5365)

CHEMCAD Maintenance

• Corrected an issue where CHEMCAD could close unexpectedly when a user’s computer either disconnects from the network or goes into sleep/hibernate mode while holding an RMS/SuperProNet License (3512/4024)
  Restored the Relief Valve icon to the UnitOp palette (5069)
• Corrected an issue where the VBA Unload CHEMCAD function did not work as expected (5217/5218)
• Corrected an issue where the OPC Run Simulation function did not return values for an unconverged simulation (5300)
• Corrected an issue where the Pipe UnitOp could change the heat transfer thermal mode when an Overall U was specified (5309)
• Corrected an issue with the Billet and Schultes method that could affect calculations that use packing hydraulic diameter (5324)
• Corrected the Larger and Smaller pipe diameter values that display in the pipe sizing report (5337)
• Corrected a calculation error in the Beggs and Brill method of the Pipe UnitOp (5343)
• Corrected an issue with mislabeled data on the thermosyphon report (5355)
• Corrected an issue with calculation of vapor velocity and pressure drop in a thermosyphon reboiler (5356)

CC-THERM

• Corrected an issue with the tube-side longneck pressure calculation (5065)
• Made CC-THERM zone-by-zone report values accessible from VBA/Excel Data Map (5169)
• Revised the static head calculation in CC-THERM (5299)

CC-DYNAMICS

• Changed default time units on dynamic plots to minutes (5350)

CHEMCAD New Features and Enhancements

• Added the capability to select the equation to use for regressing pure component data (249)
  Added asynchronous error event notification for VBServer (3575)
  Made the 'flowsheet did not converge' message more visible to users (4454)
  Added stream vertices to XML output (4967)
  Added exception handling for database connection errors (4991)
  Removed confirmation dialogs that appeared when using CHEMCAD as an OPC server (5020)

CHEMCAD Maintenance

• Corrected an issue with the Particle Size Distribution Specification dialog box (1698)
• Corrected an issue where new subcooled delta T values could not be used when "Reload Column Profile" was selected (4813)
• Corrected the critical temperature for lithium (4814)

CC-THERM

• Added new functionality to baffle specification for shell-and-tube heat exchangers (56)
• Added the capability to designate baffle spacing on a centerline basis (2268)
• Corrected an issue where importing a CHEMCAD 5 simulation into CHEMCAD 6.5 could alter the number of tubesheets and cause a nonconvergence error (5046)

CC-DYNAMICS

• Corrected an issue where negative flow in a cut stream prevented the flowsheet from converging (4752)

CHEMCAD New Features and Enhancements

• Enhanced Gibbs reactor to treat as inert any components that do not have atoms (2050)
• Reinstated a warning message that displays when the Gibbs element matrix is incomplete (4823)
• Improved convergence for internal energy flash calculation method (4782)
• Improved convergence of Reid Vapor Pressure and flash calculation method (4791)

CHEMCAD Maintenance

• Corrected an issue with incorrect pressure calculation of cocurrent heat curve (4812)
• Corrected an issue where a user-specified reaction in a reactive distillation column could cause CHEMCAD to close unexpectedly (4831)

CC-THERM

• Improved the TEMA report to consider total pressure drop, including frictional and gravitational pressure drops (2757)
• Corrected an issue with shell-side pressure drop calculation (4841)
• Added a forced evaporation downward flow model (4836)

CC-DYNAMICS

• Enhanced the Save as Initial State command so that current charge and liquid level (for dynamic vessel) or reactor content (for batch reactor) are saved (3458)
• Added more helpful information to the messages a user sees when a dynamic simulation fails to converge (4800)

CHEMCAD New Features and Enhancements

• Improved visibility of calculated values in the Economics dialog (3617)
• Added the capability to selectively run a UnitOp even when an unrelated UnitOp elsewhere on the flowsheet does not have inlet or outlet streams (4708)
• Updated CHEMCAD’s costing tools to use the CE January 2012 final values by default (4724)

CHEMCAD Maintenance

• Corrected several issues with CHEMCAD’s Economics tools (1302/1303/3981)
• Corrected an issue where running a META UnitOp would, in some circumstances, cause CHEMCAD to close unexpectedly (3783)
• Corrected an issue where attempting to save a simulation could cause CHEMCAD to close unexpectedly (4583)
• Corrected an issue where using the SCDS “Run optimization for infeasible design specs” option could cause CHEMCAD to close unexpectedly (4606)
• Corrected an issue where the liquid and vapor properties in a stream box were not updating properly (4614)
• Corrected the light and heavy liquid outlets for certain Flash icons on the CC5 palette (4620)
• Corrected an issue where read-only files did not properly show the last-modified date in the Recently Used Files list (4621)
• Corrected an issue where a licensing problem could prevent user from either accessing the workspace or exiting CHEMCAD (4650)
• Corrected an issue where selecting all UnitOps and running a large simulation could cause CHEMCAD to close unexpectedly (4697)
• Corrected an issue where the Generalized Reduced Gradient regression method could in some instances cause
• CHEMCAD to close unexpectedly (4698)
• Corrected an issue that could cause CHEMCAD to close unexpectedly during reaction rate regression (4701)
• Corrected an issue where the RateRegressionRC1.cc6 example ran very slowly (4716)
• Corrected an issue where CHEMCAD could lose a SuperPro license during a META UnitOp run (4729)
• Corrected an issue where in rare instances, CHEMCAD could generate a crash report when closing a simulation (4731)
• Corrected an issue where the Concentration variable for a sensitivity study or a controller UnitOp was not saved (4749/4742)
• Corrected an issue where the non-convergence message ‘Error: singular matrix’ could result when reverse flow occurred in a cut stream (4752)
• Corrected an issue where running an electrolyte simulation could, in certain situations, cause CHEMCAD to unexpectedly close (4769)
• Corrected an issue that could cause the vessel sizing tool to display incorrect loading flow rate values (4783)

CC-THERM

• Corrected an issue where CC-THERM could give an unreasonable pressure drop value and cause CHEMCAD to stop responding (4609)
• Corrected an issue where a converged simulation-mode heat exchanger could incorrectly display a flash error from intermediate calculations (4675)
• Improved the performance of CC-THERM’s simulation mode (4709)
• Corrected an issue that could affect nozzle size calculation for a CC-THERM shell-and-tube design case (4737)

CHEMCAD New Features and Enhancements

• Added the Hayden O’Connell thermodynamic option for vapor phase correction (3740)
• Made an .msi package of the CHEMCAD installer widely available, to support administrative installations
• Enhanced component database to enable users to enter notes when adding components (2159)
• Added Fugacity, Gamma, and K values to Quickview and all stream reports (2228)
• Combined the Pressure Drop and Pressure Out specifications for heat exchangers (2321)
• Created a self-contained 64-bit CHEMCAD installer (3189)
• Created a new UnitOp (Relief Valve) to handle relief devices in flow-balanced simulations (3879)
• Enhanced the Node UnitOp to allow specification of fixed mass/volume rate at a midstream node (549)
• Enhanced Kinetic Reactor UnitOp so that users can specify which reactions are deleted (1456)
• Enhanced the Heat Exchanger Options dialog box to enable negative pressure entry for process-side inlet (1977)
• Removed the heat exchanger heat duty calculated value from rigorous simulation mode (1997)
• Added two new symbols to the Node sub-palette (a T shape and a cross shape), for combining flow (2128)
• Enhanced the Mixer UnitOp to notify users when the unit is bypassed due to feed streams not being defined (2623)
• Implemented Billet and Schultes Sulzer Metal BX/Sulzer BX packing parameters (3465)
• Added the capability to view which Joback groups were used to create a user component (3494)
• Expanded the information given when a user is notified of a component change in the database (3506)
• Changed the behavior of the Heat Exchanger UnitOp specification screen, so that a user cannot enter two specifications if U and A are specified (3685)
• Enhanced the Sensitivity Study feature so that any electrolyte non-convergence errors appear in the Messages window (3782)
• Enhanced the Excel Data Map feature to work with Excel 2007/2010 workbooks (3792)
• Added the Batch Reactor Motor Power variable into the RAMP UnitOp (3874)
• Expanded the RVAL UnitOp to handle two-phase and liquid-only venting (3913)
• Added a more user-friendly Property description to the Update Components dialog box (3955)
• Changed the inlet and outlet pipe diameters on the thermosyphon reboiler specifications to be the inner diameter (ID) (4029)
• Added Radius of Gyration to the CHEMCAD physical properties database (4056)
• Improved thermodynamic models to aid column convergence (4073)
• Improved the recently added Relief Device UnitOp so that backflow is not allowed (4100)
• Changed the Henry's constant plot to allow the use of pure components (4180)
• Regressed Henry's constants for air (4181)
• Added UNIFAC group data for 1-Pentylnaphthalene to the component database (4344)
• Added error checking to Sensitivity Study user input (4483)
• Added a Flash UnitOp icon that allows up to six inlets (4590)
• Added synonyms for about 500 components in the CHEMCAD component database (4593)

CHEMCAD Maintenance

• Corrected an issue with simulations not saving after creation of components using the Joback method (4144)
• Corrected issues with the META UnitOp failing to run in certain circumstances (3783/4067)
• Corrected an issue where the version 6.3.2 .msi displayed the “Windows is configuring CHEMCAD” dialog every time a user logged in (3735)
• Corrected an issue where CHEMCAD 6.3 could fail to uninstall if installed from .msi via GPO action (3745)
• Corrected an issue where user-added (Excel or VBA) kinetic reactions using mass-based stoichiometry were incorrectly calculating heat of reaction and heat duty (3927)
• Corrected the vapor pressure for Triolein (ID: 2251) in the CHEMCAD component database (3797)
• Corrected an issue where using the Copy and Paste commands to place a CHEMCAD flowsheet image into another program could cause the simulation to become corrupted (3336)
• Corrected an issue where batch operation step data was exported using incorrect units (690)
• Corrected an issue where Control Valve UnitOp in “Calc Pout” mode could fail without triggering an error message (823)
• Corrected an issue with stream arrowheads facing unexpected directions on the flowsheet (1310)
• Corrected an issue where heat of combustion values were incorrect in reports (1629)
• Corrected an issue with the process type on the Input Data Report (2106)
• Corrected an issue where the relief valve sizing tool generated an unnecessary report after DIERS calculations were interrupted or stopped (2160)
• Corrected an issue where multiple Edit Streams dialogs could be opened at once, causing CHEMCAD to close unexpectedly (2572)
• Corrected an issue with creation and editing of ternary interaction parameters (TIPs) under the Pitzer method (3267)
• Corrected an issue where SCDS costing did not properly convert packing price (3481)
• Corrected an issue where the CVAL UnitOp gave a ‘100% open’ warning message when no such condition existed (3566)
• Renamed Specific Heat field in the Engineering Units Converter tool (F6) dialog to Heat Capacity (3579)
• Corrected an issue where an Excel file could be generated for UnitOps not matching the selected report (3641)
• Corrected the thermodynamics report to show the BIPs used by GMAC (3657)
• Corrected issues with the META UnitOp (3783)
• Corrected an issue where a long stream name could cause CHEMCAD to close unexpectedly (3799)
• Updated MSRK parameters for components 308, 1634, 1710, 1712, and 1719 (3845)
• Corrected the UNIFAC subgroups for some entries in the component database (3861)
• Corrected an issue where the Screen Builder utility could unexpectedly close when a user attempted to edit a VBscript dialog (3863)
• Corrected an issue that prevented users of Windows 7 64-bit OS from installing CHEMCAD 6.4. (3889)
• Corrected an issue where, in rare cases, the Thermodynamics report did not display BIPs (3902)
• Corrected an issue that prevented the Dialog Editor (ScrBuild.exe) from launching in some circumstances (3905)
• Corrected an issue where vibration criteria values were being reported incorrectly in the Excel report viewer (3909)
• Corrected an issue where CHEMCAD 6.4.0 and earlier could unexpectedly close in shell-and-tube simulations with very small flow and enthalpy near zero (3911)
• Corrected an issue where dry properties would appear in stream boxes only if the UOPK option was checked (3931)
• Corrected an issue where E coefficients were not saved for certain transport properties in user-added components (3941)
• Corrected an issue that in some cases prevented CHEMCAD licensing from working properly over a WAN (3975)
• Corrected an issue where a Relief Device could convert the reported calculated nozzle area incorrectly into inches (3988)
• Corrected an issue where generating a report from Simulation Reports could cause CHEMCAD to hang (4001)
• Corrected an issue where a cloned component did not retain the assigned Standard Name (4004)
• Corrected an issue where the name of a cloned user-specified component did not initially include the parent component’s name (4059)
• Corrected an issue with Gibbs reactor not converging when only three components were available for a reaction (4065)
• Corrected an issue where attempting to run a pipe with multiple segments in mode 5 could cause CHEMCAD to close unexpectedly (4069)
• Corrected an issue with the Note dialog box reporting the Normal Boiling Point in incorrect units (4071)
• Corrected an issue where flash algorithm could fail to converge for high-flow situations (4079)
• Corrected an issue where a compressor, expander, or pump UnitOp template could add a faulty row of numbers to a performance curve (4110)
• Corrected an issue where the CHEMCAD Explorer showed UnitOp ID -1 for a compressor, expander, or pump used with a performance curve template (4112)
• Corrected an issue where a heat exchanger could be run in utility mode with no initial estimation for utility streams (4154)
• Corrected an issue where the TPXY plot did not accept a negative relative temperature (4157)
• Corrected an issue where a dynamic simulation could encounter problems with LMTD calculation in a dynamic vessel (4160)
• Corrected an issue where electrolyte precipitate did not leave a dynamic vessel properly (4170)
• Corrected an issue where a batch reactor could fail to report a mass balance error (4187)
• Corrected an issue with the enthalpy plot that occurred for a batch reactor with an internal coil (4188)
• Corrected an issue where a controller running with a batch reactor caused CHEMCAD to close unexpectedly (4293)
• Corrected an issue where the pH value displayed in the stream tooltip did not match the pH value in the stream properties report or controller UnitOp (4317)
• Corrected a minor conversion issue that occurred when plotting a D2887 curve (4361)
• Corrected an issue where a simulation involving both HF and electrolytes could, in rare circumstances, calculate an unusable enthalpy value (4425)
• Corrected critical pressure and temperature data for alkanes C16-C20 in the CHEMCAD component database (4569)

CC-THERM

• Corrected an issue with CC-THERM simulations switching to the Kern model in the presence of shell-side fluids that do not change phase (4243)
• Added a line in the TEMA report to explain that reported pressure drop is frictional only (1029)
• Added tube thickness data to CC-THERM report (2396)
• Corrected an issue where the baffle cut limit warning did not show valid bounds for an area cut (3652)
• Corrected an issue where a shell-and-tube heat exchanger could be run in simulation mode with a thermosyphon, kettle reboiler, or knock-back condenser (3865)
• Corrected an issue with calculated MTD for counter-current plate heat exchangers (3884)
• Corrected a convergence issue for shell-and-tube exchangers where the Reynolds number is less than 3 (3890)
• Corrected an issue where “The minimum shell diameter is 3 inches” error message could incorrectly result from running or sizing a kettle reboiler (3918)
• Corrected an issue where bundle pressure drop was reported differently for different baffle types, for a heat exchanger with no baffles (4027)
• Corrected an issue where CC-THERM incorrectly displayed an error message for a shell-side horizontal condenser in simulation mode (4189)
• Corrected an issue with incorrectly calculated meter-to-foot conversion (4193)
• Corrected an error that caused the fouling rate for one side of a heat exchanger to zero out the fouling rate for the other side (4240)
• Corrected an issue where fouling rating for double-pipe heat exchanger could give very large fouling factor values (4259)
• Corrected a rare file issue that could cause a CC-THERM simulation to close CHEMCAD unexpectedly (4307)
• Corrected a minor issue in inlet/outlet nozzle pressure drop calculations (4432)
• Corrected an issue where the nozzle inner diameter for a thermosyphon was updated to match the specified pipe outer diameter (4434)
• Corrected an issue where in rare instances, saving a simulation could produce a “System resource exceeded” message (4583)
• Corrected an issue with the calculation of two-phase shell-side pressure drop (4596)
• Corrected minimum tube pitch standards for TEMA C (4601)
• Added the capability for user-specified tube sheet thickness (4603)
• Changed the file format for CC-THERM cases, to accommodate future program enhancements; cases opened in
• CHEMCAD 6.5 will automatically convert to the new format, and should then be opened only with 6.5 (or later versions) to preserve data changes (4612)
• Corrected the CAS number for Thymol (4616)
• Corrected the CAS number for CaCl2, ID 1185 (4617)
• Corrected the light and heavy liquid outlets for certain Flash icons on the CC5 palette (4620)
• Corrected an issue where zone LMTD approaching zero could cause problems with a CC-THERM simulation (4641)
• Corrected an issue where CHEMCAD could become nonresponsive due to problematic CC-THERM pressure-drop values (4655)
• Corrected an issue where a DVSL UnitOp with initial liquid levels of zero could prevent a simulation from running (4658)
• Corrected an issue where running a META UnitOp could in some cases produce a “No process unit specified” message and fail to run the child simulation (4662)

CHEMCAD New Features and Enhancements

• Replaced License Manager 7.2 with RMS License Manager (3364)
• Added the capability to use commuter licensing from non-administrator accounts with RMS (2262)
• Added a new operating mode, Thermo Acceleration, which can decrease calculation time for complex simulations (2841)
• Improved convergence for multiple solid electrolyte systems (3351)
• Added the capability to enter electrolyte density, viscosity, diffusivity, Henry's constants, and BIPs to a user database (2821/2846/2847/2848/2849)
• Improved reporting of critical flow errors in piping networks (3121)
• Added the capability to select an equation of state for use with Poynting factor (3151)
• Added the capability for simultaneous heat transfer and mass transfer models in distillation columns (3610)
• Added the capability to regress BIPs from partial pressure data (3306)
• Added a section to the Topology Report that lists stream and UnitOp relationships (such as controllers, stream references, streams copied from another flowsheet, or META units) (244)
• Improved and extended solubility for sodium carbonate and its hydrates in the mNRTL electrolytes package (483)
• Revised Henry’s constant coefficients for chlorine (888)
• Added the capability to specify which reaction(s) are deleted for reactor UnitOps (1456)
• Improved flowsheet error detection to reduce the incidence of duplicate stream ID errors (1924)
• Improved the Compressor UnitOp so that the Pressure Out field is cleared when not needed (2139)
• Added new BIPs for the water-HBr-bromine electrolyte system (2529/2530)
• Added 56 liquid-liquid equilibrium BIPs to the CHEMCAD database (2590)
• Improved the heat curve algorithm for bubble-dewpoint systems (2758)
• Improved the default class selection during creation of a new user-defined electrolyte component (2862)
• Renamed the Alt SI and SI engineering unit profiles to Common SI and Formal SI, respectively (2954)
• Added the capability to perform an administrative installation of CHEMCAD from an .msi file (2967)
• Added a warning for the Compressor UnitOp if inlet or outlet vapor fraction is less than 1 (2983)
• Improved convergence for node flowsheets where some UnitOps are near critical flow (3014)
• Added an option to use the European standard symbol for the Pump UnitOp (3185)
• Enhanced VBClient.xls to enable reporting of unconverged UnitOps (3209)
• Revised ideal gas enthalpy for new components using the Joback method (3213)
• Improved electrolyte regression for CaCl2 systems (3230)
• Added a unit label to the Sherwood-Eckert packing factor in column sizing (3294)
• Enhanced stream properties to allow calculation of entropy for a solid (3312)
• Enhanced the CHEMCAD Hydrates tool to enable uses to enter a temperature or pressure range and create plots (3339)
• Improved convergence for multiple solid electrolyte systems (3351)
• Enhanced the CHEMCAD Explorer so that stream numbers are still displayed, even after streams are named (3353)
• Added a 'Liquid & Solid' section to the Tray Properties report (3389)
• Improved the Kinetic Reactor UnitOp by adding the capability for solid-gas reactions (3400)
• Added the capability to set global stream and UnitOp starting ID numbers (3411)
• Added the capability to set display preferences for the Run Trace window (3412)
• Added the capability to set a keyboard shortcut for drawing streams (3414)
• Changed the behavior of the TP Box so that the default selection is Select Streams, rather than All Streams (3477)
• Changed the TP Box feature so that it displays a negative sign to indicate reverse flow when present (3478)
• Added BWRS BIPs to the Thermodynamics report (3523)
• Added a new and improved OTS amine simulation to the CHEMCAD example library (3570)
• Added warnings to costing algorithms to alert users of unusually large or small equipment (3574)
• Added the capability to create a keyboard shortcut for the Change Stream ID command (3614)

CHEMCAD Maintenance

• Added missing polynomial ideal gas heat capacity parameters to approximately 350 components (may trigger component update messages; can affect calculations for Gibbs reactors) (3836)
• Corrected an issue with dynamic simulations saved in an elapsed-time condition (3080)
• Corrected a problem where user-edited equation-of-state BIPs were not used (3110/3119)
• Corrected an issue with the legacy option for ASME steam table which could occur above critical temperature of water (3944)
• Removed duplicate entries from CHEMCAD component databases (1081/2132)
• Corrected an issue where '%' in stream name caused problems with simulation (2252)
• Corrected an issue with the Symbol Editor utility displaying a failed registry message (2905)
• Added missing PRSV BIPs to the component database (3010)
• Corrected an issue where adding system BIPs using the Select Database BIP dialog box did not prompt for reflash (3128)
• Corrected an issue where flowsheet time units could interfere with reactive distillation (3147)
• Corrected an issue with SCDS not supporting electrolyte (true species) reactions in mole fraction bases (3153)
• Corrected an issue where running an SCDS column using condenser mode 9 (Two components molar flow ratio) could cause CHEMCAD to close unexpectedly (3160)
• Corrected a minor issue with air cooler mean temperature difference calculation (3196)
• Corrected the use of SRK BIPs for component pairs in MSRK simulations with user-added MSRK BIPs (3220)
• Corrected an issue with the META UnitOp (3222)
• Corrected an issue with the Close All Charts command leaving equilateral triangle charts open (3296)
• Corrected an issue with stream templates that were created in CHEMCAD 6.2 (3303)
• Corrected a rare issue that could cause CHEMCAD to stall during launch while initializing VBA (3346)
• Corrected an issue with the heating value for solid components (3401)
• Corrected an issue where CHEMCAD could incorrectly calculate a vapor fraction of 0 above its critical temperature for a component with a Henry's constant (3434)
• Corrected an issue with CHEMCAD automation menu.xla for 64-bit Office 2010 (3437)
• Corrected an issue with the Spec Sheet report so that streams numbered higher than 255 are included (3485)
• Corrected an issue with the Kirkbride equation in the shortcut column UnitOp (3501)
• Corrected an issue where a clean installation of version 6.3.2.4358 could give error 429, affecting Excel automation (resolved with release of version 6.3.2.4389) (3520)
• Corrected an issue where, in some cases, a plate heat exchanger would not report a failure to converge (3531)
• Corrected an issue which, in rare circumstances, could cause a very large flowsheet to close unexpectedly (3567)
• Corrected an issue with the Mixer electrolyte option where a mixer could in rare circumstances be out of mass balance without a warning (3711)
• Corrected an issue where running a simulation from the COM interface could disable user interaction (3739)
• Corrected the UNIFAC subgroup for 4-Hydroxyacetophenone in the CHEMCAD component database (3751)
• Corrected an issue where CHEMCAD could unexpectedly close upon use of a VBA electrolyte mixing rule (3758)
• Corrected the plotting of heat curves using the global thermo model in place of a specified local thermo model (3762)
• Corrected an issue where standard heat capacity and Henry’s constants entered during electrolyte component creation were not saved (3784)
• Corrected an issue where editing intermediate streams could cause inconsistencies in electrolyte true species simulations (3817)
• Corrected a unit conversion error that could occur when recording solid heat capacity in a sensitivity study (3824)
• Corrected an issue where a user might receive an error message about saving modified data when editing a user-added component (3933)
• Corrected an issue with incorrect calculation of heat transfer coefficient for pipe heat transfer model with no vapor flow (4145)

CC-THERM

• Improved zone temperature calculation for horizontal tube-side condensation with shell-side evaporation (3468)
• Added help documentation for plate heat exchangers, double pipe heat exchangers, and air coolers (2283/2284/2285)
• Added a new configuration option, with two inlets and one outlet, to the J (divided flow) shell model (1636)
• Corrected an issue where the Heat Capacity unit label was incorrectly displayed on the Excel report viewer (2783)
• Added the Reynolds number for shell-side stream analysis and Kern method to CC-THERM reports (2952)
• Corrected an issue with calculation of number of tubes for a kettle reboiler based on shell diameter (2995)
• Added new options to the Nozzle dialog for an X-shell with a three-nozzle connection (3015)
• Corrected an issue where outlet stream conditions failed to update for a one-sided heat exchanger (3127)
• Corrected an issue with calculation of tube-side heat transfer coefficient for laminar flow with VDI Nusselt Number
• Correlation selected (3141)
• Corrected tube count for no-tube-in-window baffle case (3238)
• Corrected an issue where a superheated vapor error message could prevent running a knockback condenser (3265)
• Corrected an issue where an error message prevented CC-THERM from running a heat exchanger with liquid-stratified sub-cooling flow (3302)
• Added the capability to access fouling factors from Excel Data Maps, controllers, sensitivity studies, etc. (3309)
• Corrected an issue with large static head triggering a message about inadequate driving force (3338)
• Changed the default value for the outlet mole vapor fraction in the Thermosyphon Reboiler specification dialog (3342)
• Added protection for heat curve generation when relevant physical property data is undefined (3348)
• Corrected an issue with TEMA sheet reporting the wrong flow for knockback condensers in some circumstances (3403)
• Added a new convergence method and algorithm for CC-THERM stream analysis case (3445)
• Corrected an issue where selection of TEMA B, TEMA C, or ASME class for a shell-side single- or two-phase exchanger with Bell-Delaware method resulted in an incorrect pressure drop calculation (3559)
• Added a pressure drop calculation for multiple inlet and outlet nozzles in an air cooler (3591)
• Corrected an issue with conversion between diameter and area baffle cut percentages (3642)

CC-DYNAMICS

• Improved dynamic column performance (3565)
• Corrected an issue with BREA 'KREA file not found' message for zero reactions (1235)
• Added the capability to run Excel Data Maps for each time step in dynamics mode (1444)
• Added warnings for PID controller measured variable outside min/max range (3210)
• Added a new and improved OTS amine simulation to the CHEMCAD example library (3570)

CC-BATCH

• Corrected an issue where pot charge could be deleted as a result of inserting a new first step for Batch Column (2453)
• Improved convergence of batch distillation using SCDS method (3212)

CHEMCAD New Features and Enhancements

• Added the capability to specify a chemical reaction enhancement factor for mass transfer distillation calculations (2842)
• Added an auto-estimation mode for the Batch Distillation Column UnitOp to improve column convergence (2896)
• Enhanced distillation curve characterization to use the standard stream selection dialog box (516)
• Added a warning for a one-sided heat exchanger so that users will know if utility rating entries are overriding
• Specifications tab entries (1151)
• Added the Browse capability to assist in finding a targeted Excel Data Map (1567/2772)
• Enhanced the Composite Curves feature to make shifting composite curves optional (2763)
• Enhanced stream properties to allow entropy to have units of absolute temperature (°R, K) (2808)
• Added the capability to rename an Excel Data Map while it is open in CHEMCAD (2852)
• Enhanced the RAMP UnitOp so that it no longer generates errors when disabled (2878)

CHEMCAD Maintenance

• Corrected an issue where a Stream Reference UnitOp in bypass mode could trigger a ‘No specifications' error message (1959)
• Corrected an issue with the Predictive Crystallizer example simulation so that the Excel UnitOp runs properly (2547)
• Corrected an issue where CHEMCAD could close unexpectedly if left open and idle for long periods of time (2819)
• Corrected an issue where imported user electrolyte components were not recognized as electrolytes (2860)
• Corrected an issue where the Control Valve UnitOp in ‘Fix flow and position' mode could recalculate the flow rate instead of pressure (2863)

CC-THERM

• Changed the default nozzle sizes in CC-THERM to standard pipe sizes (2845)
• Corrected an issue where deleting Excel Data Map rows could cause difficulties with the Data Map (2855)
• Improved the default inlet and outlet baffle spacing for new CC-THERM simulations (2857)
• Corrected an issue where a heat exchanger in fouling rating mode, with two or more parallel shells, could generate different service and calculated heat transfer coefficients (2886)
• Added the LMTD correction factor to air cooler reports (1479)
• Added Stream Analysis for segmental baffles with no tubes in window (2518)
• Added Window, End, and Crossing velocities to the tabulated report for baffles with no tubes in window (2523)
• Corrected an issue with fouling values being assigned to the wrong side of an air cooler for an air-side fouling rating (2662)
• Disabled certain calculated fields when the Heat Exchanger UnitOp is in simulation mode, as these values are not relevant in that mode (2804)
• Corrected an issue where CC-THERM reported inconsistent values for density on the TEMA report in MS Word or the internal report viewer (2815)
• Corrected an issue where creating a TEMA sheet could cause CHEMCAD to close unexpectedly (2818)
• Corrected an issue where a pinch warning appeared when the number of shells in series was greater than 1 for a Heat
• Exchanger UnitOp in simulation mode (2838)

CHEMCAD New Features and Enhancements

• Added the capability to use COM objects to control instances of CHEMCAD (591/2512)
• Added the Browse capability to assist in finding a targeted Excel DataMap (1567/2772)
• Added the capability to perform a data reconciliation from the xlCHEMCAD menu in Excel (1991)
• Added the capability install CHEMCAD silently (2092)
• Added the Format > Starting IDs command, which enables the user to set starting ID ranges for streams and UnitOps (2157)
• Added a comment field for Excel DataMap (2469)
• Added the capability to copy and paste values within a DataMap (2486)
• Added the capability to store BIPs in a database other than NRTL, Wilson, SRK, PR, or BWRS (2602)
• Improved the performance of local thermodynamic settings (2634)
• Added the capability to shift hot and cold composite curves to achieve minimum delta T (2635)
• Added the capability to load a simulation into Excel as read-only from the xlCHEMCAD menu (2638)
• Added new carbon capture examples to CHEMCAD installation (2673)
• Enhanced the vessel pressure graph for a dynamic run by adding a y-axis title (2691)

CHEMCAD Maintenance

• Corrected an issue, introduced with version 6.2.1, which could cause flash errors in systems with dissolved supercritical gases in water (2761)
• Corrected an issue that occurred when a user specified 0 °C or 0 °F for a TPXY plot based on constant temperature (1064)
• Corrected an issue with stream or UnitOp groups not updating ID numbers (1078)
• Corrected an issue with improperly displayed plots and reports via Terminal Server (2103)
• Corrected a data entry issue in the crude oil database (2237)
• Corrected an issue with the xlCHEMCAD menu in Excel not initializing for Vista users (2471/2485)
• Corrected an issue with fouling values being assigned to the wrong side of an air cooler for an air-side fouling rating (2662)
• Corrected an issue where initial vessel pressure and liquid pressure could be inconsistent when static pressure was specified (2744)
• Corrected an issue where CHEMCAD simulations could fail to save when opened from and saved back to a USB drive (2778)
• Removed redundant items from the View > Flowsheet Settings submenu (2812)
• Corrected an issue where subcooled liquid could improperly flash (only occurred in test versions) (2867)

CC-THERM

• Removed improper baffle cut restrictions on double and triple segmental baffles (2316)
• Corrected an issue with the reporting of generic turbulator data in Excel (2378)
• Corrected an issue where the wrong condensing type was reported for the VDI method (2475)
• Corrected an issue with the fouling ratings mode for air coolers (2657)
• Corrected an issue with co-current and vertical knock-back condensers displaying incorrect inlet vapor velocity (2697)
• Corrected an issue where a double-pipe simulation with a user-specified fin tube did not converge (2711)
• Corrected an issue with air cooler heat curve editing (2755)
• Added an error message that displays when no liquid is present in a kettle reboiler (2779)
• Corrected an issue where the General Specifications dialog box sometimes failed to appear when needed for a kettle reboiler (2780)

CHEMCAD New Features and Enhancements

• Added the LMTD correction factor to air cooler reports (1479)
• Added new 'read-only' LoadSim() function to COM API (1988)
• Added the Pikes Peak Selexol simulation to the CHEMCAD examples (2196)
• Added the capability to set legacy CHEMCAD 5 settings from the Options menu (2296)
• Added the capability to use the BWRS thermodynamic method in CHEMCAD 6 (2331)
• Added the capability to show/hide all stream names in a simulation (2350)
• Created a new recycle cut stream algorithm to take controllers into account (2497)
• Added the Ideal Cp/Cv property for Data Map and VBA (2517)
• Added Stream Analysis for segmental baffles with no tubes in window (2518)
• Added Window, End, and Crossing velocities to the tabulated report for baffles with no tubes in window (2523)
• Added the capability to regress electrolyte BIPs between inert solvents and ions (2541)
• Added an option for a Composite Curve delta T plot (2555)
• Added a Notes section to the Consolidated Report (2559)
• Added a new print format for electrolyte regression (2567)
• Changed the interaction between CHEMCAD and Microsoft Word due to MS security changes (2621)
• Added five new CHEMCAD examples for power plant carbon capture (2673)
• Added the TmmC term to the electrolyte NRTL model (2709)

CHEMCAD Maintenance

• Corrected the equation for the LMTD correction factor for 4-4 air coolers (2491)
• Corrected an issue with the toolbar Restore Default command (2514)
• Corrected an issue with the Controller UnitOp's Scale labels (2516)
• Corrected an issue where LLV unit icons created with Symbol Builder were added to the Flash subpalette (2540)
• Corrected an issue with nested controller loops and recycle loops in sequential mode (2551)
• Corrected an issue where CHEMCAD could give a false message when a local thermodynamics method is specified (2568)
• Corrected an issue where a new BIP stored in a simulation could be listed as a system BIP (2603)

CC-THERM

• Corrected an error with display units for shell-side and tube-side film resistances on CC-THERM reports (2318)
• Corrected an issue with the Vertical Thermosyphon not accepting the optional h film coefficient value (2515)
• Corrected an issue where the Reynolds number was not reported when using double-or triple-segmental baffle with Bell-Delaware method (2565)
• Corrected an issue where running an air cooler case on a Tower Plus unit could reset simulation settings (2584)
• Corrected an issue with thermosyphon heat curve convergence (2598)
• Corrected an issue with random text displaying for utility streams in the air cooler stream report (2619)

CC-DYNAMICS

• Added the option to reset integral error for the PID controller and control valve UnitOps (1231)
• Added a warning to display if the PID controller set point value is not within bounds of Variable Min and Variable Max (2033)
• Added rate regression simulations to the Dynamics examples directory (2227)
• Corrected an issue where the "Save As" command did not properly save the initial state for dynamic simulations (2501)
• Added the capability to use packed column rating pressure profile in dynamic simulations (2536)
• Corrected an issue where the runtime plot for CC-DYNAMICS could stop and prevent other plots from displaying under Windows Vista and 7 (2730)

CHEMCAD New Features and Enhancements

• Introduced the CHEMCAD Report Writer system, which provides enhanced user-customizable reports (2006)
• Added the capability to enter user-created BIPs into a database (1525)
• Added the capability to generate equilateral triangular plots (870)
• Added the capability to omit unconverged points from a TPXY plot (2223)
• Added the capability to optimize OPC performance by selectively limiting the data published via OPC (2224)
• Improved System Authorization licensing method to apply to a specific computer rather than to individual users (2210)
• Added new examples covering Selexol(TM) carbon capture, reaction rate regression, and multiple-effect evaporation (2196, 2227, 2532)
• Added a thermal conductivity mixing rule for electrolytes (682)
• Added the capability for OPC users to change feed stream component flow rates, temperature, pressure, velocity, and total flow (800)
• Created the Mass and Energy Balances report, which replaces the Convergence report (855)
• Added distillation curves D86 and TPB to the available options on the Stream Properties report (912)
• Revised and made available packing data for Billet and Schultes method (1330)
• Added the window velocity value to the Zone-By-Zone Analysis for shell-side sensible flow and tube-side condensation or evaporation (1516)
• Added a multiple-inlet symbol to the Gibbs Reactor sub-palette (1577)
• Added the capability to model solid-vapor equilibrium (1710)
• Added the capability to edit the PID Controller calculated results on the Misc Settings tab (2032)
• Created a warning that displays if the PID controller setpoint value falls outside the sensor's defined range (2033)
• Made the Mass Transfer report easier to read (2078)
• Changed the name of the Stream Recorder History plot to Stream History (2085)
• Added a prompt enabling the user to specify where to store user-defined components for a single component database (2101)
• Added UNIFAC subgroups for component 2027, Pentaethylene Hexamine (2164)
• Added the capability to include up to 50 different solid components in a single simulation (2193)
• Added the capability to specify up to six objects for feed-forward controllers (2240)
• Added the capability to reset the UnitOp palette to display the original default icons (2253)
• Added a warning message to inform user of incorrect formula entered for user-added component (2282)
• Added the capability to set the CHEMCAD 5 import directories from within CHEMCAD 6 (2296)
• Changed the Topology report to include the calculation sequence (2308)
• Improved mass transfer column convergence (2369)
• Improved the TBP/D86 conversion method (2382)
• Added the capability to change heat exchanger simulation mode from a DataMap or controller (2467)
• Added mass balance view for dynamic simulations (2478)
• Added ITAE calculation to the PID controller UnitOp (2482)

CHEMCAD Maintenance

• Improved flash convergence for electrolytes in adiabatic flash (2438)
• Corrected an issue with the TPXY plot (PSRK/latent heat, Acetylene/Hexane) producing one out-of-place point (831)
• Corrected an issue with the behavior of items on the Other Data component editing dialog box (953)
• Removed a message about CAPE-OPEN thermodynamics from the Errors and Warnings tab when not applicable (1125)
• Corrected a rare issue with reactive distillation in SCDS not working properly on top of a batch reactor (1216)
• Corrected an issue with META unit improperly calculating stream flow rates between parent and child simulations (1543)
• Corrected an issue with VBA that could occur when the CHEMCAD interface was not running (1728)
• Corrected an issue that sometimes caused unzipped CHEMCAD files to have incorrect file creation dates (1973)
• Corrected an issue where user-created components could fail to copy properly as part of a stream copy operation (2202)
• Corrected an issue with the DataMap feature not working properly in simulations containing both SCDS and batch reactor UnitOps (2212)
• Corrected an issue where the use of local K-values for a distillation column could prevent a simulation from being saved (2247)
• Corrected an issue where standard liquid volume was reported incorrectly in the Stream Properties report for electrolytes (2290)
• Corrected an issue that prevented the addition of a user icon to the PID Controller sub-palette (2298)
• Corrected an issue with the total flow rate on the Bulk Properties page of pseudocomponent curves failing to match the flowsheet for certain flow units (2303)
• Corrected an issue with cut stream persisting after a second cut stream is selected (2305)
• Corrected an issue with calculation of air cooler tube-side pressure drop (2322)
• Corrected an issue with UnitOp dialog boxes performing input checks on calculated values (2332)
• Corrected an issue with Batch Reactor T/Q specifications not saving properly when zero reactions are specified (2348)
• Corrected an issue with user-specified cut streams failing to save correctly (2351)
• Corrected an issue where the OPC server functioned improperly when run as a COM server without the CHEMCAD graphical user interface (2364)
• Corrected an issue where the liquid phase was deleted from the Solid Components dialog box after changes were made to the flowsheet (2371)
• Corrected various formatting and content issues in Excel reports (2417, 2421, 2423)
• Corrected an issue that caused the Sensitivity Study dialog box to behave incorrectly for ten or more recorded variables (2437)
• Corrected an issue with the WAR report that caused extraneous characters to print with user component names (2456)
• Corrected an issue with electrolyte reactions being unavailable when first created (2462)
• Corrected an issue that prevented reaction constant changes made during a dynamic run from affecting that run's results (2490)
• Corrected an issue that prevented the Save As command from correctly saving the initial state for a dynamic simulation (2501)
• Corrected a dialog box issue to allow entry of liquid-liquid extractor side product specifications (2506)
• Corrected an issue that caused CHEMCAD, in rare situations, to stall after a user edited a stream and then ran the simulation (2508)

CC-THERM

• Improved vibration analysis by using actual inlet/outlet baffle spacing for cross-flow velocity (1523)
• Added a ‘No Baffle' option in the CC-THERM Baffle Specifications dialog box (1353)
• Added the capability to enter a negative value for the air-side inlet temperature for air coolers (1981)
• Corrected an issue where baffle spacing was incorrectly affecting the calculation for X shell in a sensible-sensible case (2066)
• Corrected a rare issue with calculation of vapor phase fraction for the vibration report (2236)
• Corrected an issue with CC-THERM failing to save heat curve edits (2245)
• Corrected an issue with incorrect units displaying for shell-side and tube-side film resistances on CC-THERM reports (2318)
• Corrected an issue with heating curves not initializing correctly (2374)