CHEMCAD V.7 Support

Software Update Downloads

CHEMCAD 7.1 Suite

  • Most recent release is Version 7.1.4.10142 (April 25, 2017).
    Contact CHEMCAD Support for .exe or .msi installation file download.
    Maintenance revision - see release notes for issues that this version addresses. Install this version if you are currently using version 7.1.2 or earlier.
  • CHEMCAD User Guide (PDF 7.4 MB)

Network Software

IMPORTANT NOTICE:

Do you compile your own custom UnitOps, K-values, or pipe methods? Advances in CHEMCAD 7.1 made it necessary for users of usradd.dll to recompile with the new usradd workspace before loading that .dll into CHEMCAD 7.1 or later. Please contact Chemstations at 1-800-CHEMCAD or support@chemstations.com for more information about this important maintenance task. We will be happy to assist you, and to notify you of future changes that affect UAM users.

CHEMCAD version 7 logo

Support Center

We go the extra mile when it comes to providing reliable and comprehensive support. Discover our vast range of helpful CHEMCAD resources including release notes, Support Center details and flexible training opportunities.

Minimum System Requirements

We recommend the following system configurations so you can experience the best that CHEMCAD has to offer:

  • Processor speed: 500 MHz or higher
  • Operating system: Windows Vista, 7, 8, or 10 (all 32- and 64-bit versions)
  • RAM: 256 MB
  • Video card: 128 MB or higher video memory
  • Display resolution: 1024 x 768 or higher
  • Hard disk space: 750 MB
  • Productivity software: Some features require Microsoft Office®

Release Notes

CHEMCAD Maintenance

  • Corrected minor display issues with the Equilibrium Reactor UnitOp report (6320)
  • Corrected changes to the user-added module (UAM) code that were included in the 7.1.2 release (6330)

CHEMCAD New Features and Enhancements

  • Updated the XS and STD pipe schedules in CHEMCAD to include nominal pipe sizes as large as 48” (6295)

CHEMCAD Maintenance

  • Corrected an issue with the initialization of commuter licenses (6276/6319)
  • Corrected an issue where a PIPE UnitOp on an all-vapor stream could calculate incorrect heat transfer values (6293)
  • Corrected an issue with warning messages blocking OPC communication (6231)
  • Corrected an issue with the thermal mode setting for the PIPE UnitOp (6313)

CHEMCAD New Features and Enhancements

  • Improved the PIPE UnitOp dialog to streamline data input for pipe schedules, update schedule table data, and expand available pipe size options (3207, 3385, 6251, 6257)
  • Updated the Q, R, and main group BIPs for PSRK and UNIFAC (5098, 6171)
  • Added a calculated head display field to the Compressor UnitOp specification dialog (5628)
  • Updated Modified UNIFAC to 2016 revision 6 (6041)
  • Added pressure dependence to VTPR liquid-liquid calculations (6097)
  • Improved convergence for the Hayden O’Connell vapor phase association model (6233)

CC-DYNAMICS

  • Added a warning to prevent vessel catalog from overriding user input for the Vessel Reactor UnitOp (5954)

CHEMCAD Maintenance

  • Corrected an issue with neutral file import (5871)
  • Corrected an issue where the [F6] engineering unit converter dialog gave some incorrect conversions (6164)
  • Corrected a database issue with user-added components that include library data (6169)
  • Corrected a rare issue with user-added modules not displaying all items contained in the usradd.dll menu (6173)
  • Corrected an issue where CHEMCAD 7 could stop unexpectedly when running a compressor with a single speed line (6188)
  • Corrected an issue with the Hide All Stream IDs command (6190)
  • Corrected an issue with PIPE UnitOp pipe thickness not updating in conjunction wth pipe schedule and nominal diameter definition (6250)

CHEMCAD New Features and Enhancements

  • Added cricondentherm and cricondenbar to the Overall property list for reporting (3710)
  • Updated and added numerous subgroup assignments for UNIFAC and Modified UNIFAC (3045/5612/6082/6126)
  • Updated the Specify Excel Workbook dialog to display all Excel file types (.xls, .xlsx, and .xlsm) when a user browses for files via the Add Excel Range command (4414)
  • Increased the number of consecutive Undo/Redo operations that a user can perform in an open simulation (5948)

CC-DYNAMICS

  • Added a Vessel Reactor symbol that visually represents the incorporation of a relief device (1547)

CHEMCAD Maintenance

  • Corrected a display issue that caused extra blank lines to appear in some sections of the Consolidated Report (6127)
  • Corrected an issue where the calculation sequence setting could not be changed from sequential modular to simultaneous modular (6135)
  • Corrected an issue where UnitOps could not be selected for the Run Selected or Run Recycles commands by clicking their flowsheet symbols (6136)
  • Corrected an issue where running UnitOps out of flowsheet sequence using the Run Recycles command could cause
  • CHEMCAD to close unexpectedly (6137)
  • Corrected an issue where a flowsheet could become unresponsive to mouse clicks (6138)
  • Corrected a rare issue where dragging a group of flowsheet objects could result in misplaced stream lines (6149)
  • Corrected a rare issue that could occur with the [F6] Engineering Units Converter for a pressure drop field converting from millibars (6164)
  • Corrected MSRK documentation to show accurate equations (6117)
  • Corrected an issue where phase envelope plots for a simulation using the VTPR model were calculated using SRK (6148)

CHEMCAD New Features and Enhancements

  • Added the VTPR (Volume Translated Peng-Robinson) equation of state, which also provides enthalpy and liquid density calculations (4808)
  • Added an Orifice tab to the Pipe UnitOp specifications to display pressure drop calculations (1027)
  • Enabled the use of right-click Copy and Paste commands in spreadsheet-style data entry screens (4386)
  • Redesigned the Run menu to improve access to the steady state/dynamics command (5745)
  • Improved flowsheet printing capabilities (5841)
  • Imported 31 new components from the DIPPR 2016 database (6027)
  • Added a Size option to enable larger or smaller workspace canvas size (5991)
  • Expanded UNIFAC groups to allow 32 subgroups (2606)
  • Enhanced the Thermodynamics report for electrolyte systems (2912)
  • Added the option to automatically run selected UnitOps in flowsheet convergence sequence (4931)
  • Updated the CVAL UnitOp to allow the use of Kv units (5229)
  • Updated VBClient.xls to use new VB functions for stream values (5517)
  • Added the option to specify stream composition in mole percentage (5655)
  • Revised the default potassium solid heat capacity data used in CHEMCAD (5700)
  • Improved the Find Stream and Find UnitOp commands by automatically selecting the found items on the flowsheet (5904)
  • Updated the cost index to use January 2016 values (6010)
  • Improved databox printing (6021)
  • Enhanced topology integrity by preventing changes to flowsheet objects during run operations (6055)
  • Updated the VTPR model and BIP parameters to the October 2016 paper "Present status of the group contribution equation of state VTPR and typical applications for process development" (Schmid & Gmehling) (6074)

CHEMCAD Maintenance

  • Changed the delta P units on the Orifice Sizing dialog to display in pressure units (1076)
  • Added new logic to ensure appropriate enthalpy model selection when K-value model is changed (1298)
  • Added a message that warns users if two Node UnitOps are placed on a flowsheet next to one another (3146)
  • Corrected an issue where non-standard regional settings could cause simulations to fail (4010)
  • Corrected an issue with the Reset ID Position command (4942)
  • Added an option to stop searching for network licenses once a valid license is secured (5170)
  • Enhanced CHEMCAD’s Excel tools to work with 64-bit Excel (5352/5658)
  • Removed AutoCalc from the Calculation Sequence options (5408)
  • Corrected an issue with the liquid level calculation in DIERS (5632)
  • Corrected a convergence issue with pressure vessel relief sizing (5704)
  • Corrected unit conversion for liquid and vapor heat capacity and liquid latent heat in the Data Map and VBA features (5873)
  • Corrected an issue with the restoration of stream and UnitOp warning/error colors after running a sensitivity study (6035)
  • Corrected an issue where PSRK data was not fully installed (6046)
  • Added version handling for UAM (6062)

CC-THERM

  • Added a Minimum LMTD correction factor specification for CC-THERM (514)
  • Corrected an issue where a U-tube bundle could be calculated as having an odd number of tubes (4221)
  • Corrected CC-THERM’s Rho V2 calculations (5084)
  • Corrected the formula used to report total LMTD for kettle and thermosyphon reboilers (5379)

CC-DYNAMICS

  • Corrected a minor issue where the Dynamics "Restore to Initial State" command did not restore appropriate colors to UnitOp ID boxes (255)

CHEMCAD New Features and Enhancements

  • Improved the speed of scrolling and zooming in large flowsheets (5896)

CHEMCAD Maintenance

  • Corrected an issue that caused incorrect values to display on multi-stream reports for K-value, activity coefficient, and fugacity coefficient data (5995)
  • Corrected an issue that caused garbled characters to appear in palette titles, reports, and flowsheets
    for Japanese installations of CHEMCAD
    (5935/5936/5937)

CHEMCAD Maintenance

  • Corrected an issue with flowsheet convergence that could occur after using the Run Selected UnitOps command (5969)
  • Corrected a rare issue where the program could close unexpectedly when opening a simulation imported from CHEMCAD 6 (5971)

CHEMCAD New Features and Enhancements

  • Improved the [F6] unit converter feature so that typing numbers into one field automatically updates the other fields in real time (2668)

CHEMCAD Maintenance

  • Corrected an issue with persistence of the Quickview pop-up window (5882)
  • Corrected an issue where in rare cases, imported CHEMCAD 6 UnitOps and streams could not be double-clicked for editing (5908)
  • Corrected an issue where specifying a UnitOp and later removing specifications could corrupt a corresponding databox or cause the program to unexpectedly close (5883, 5918)

CHEMCAD New Features and Enhancements

  • Made major improvements to the CHEMCAD reporting engine (4224)
  • Added CAPE-OPEN connection to HTRI Xchanger Suite (trademark of Heat Transfer Research, Inc.) (419)
  • Updated DIPPR equations, adding equation 124 to the program and expanding the parameters for equations 119 and 127 (5781)
  • 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)
  • 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)
  • Added the capability to select the equation to use for regressing pure component data (249)
  • Improved default enthalpy model selection for K-value models (1298/5823)
  • Added capability to select temp folder location for simulations (1324/5145)
  • Added MJ/kg engineering units to the Specific Heat property (1578)
  • Enhanced Gibbs reactor to treat as inert any components that do not have atoms (2050)
  • Updated all CHEMCAD example simulations, with more instructive annotations (2686/3065/5428)
  • Added kPa G pressure unit to Engineering Units dialog options (3177)
  • Added the capability to remove items from the list of recovered files in the CHEMCAD Explorer (3503)
  • Changed the behavior of the recovered files list in the CHEMCAD Explorer, so that it appears below the recently used files list and is collapsed by default (3557)
  • Added asynchronous error event notification for VBServer (3575)
  • Improved visibility of calculated values in the Economics dialog (3617)
  • Revised Pipe UnitOp report to include internal pipe diameter (3747)
  • Added single phase option to the Flash UnitOp, replacing the former LLVF UnitOp (3898)
  • Improved the interface between CHEMCAD and the Economics tool (3981)
  • Implemented Schultes 1999 as a new packing method for mass transfer column sizing and rating (4166)
  • Added UNIFAC parameters to isoquinoline, component 841 (4358)
  • Made the 'flowsheet did not converge' message more visible to users (4454)
  • 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)
  • Improved convergence for internal energy flash calculation method (4782)
  • Improved convergence of Reid Vapor Pressure and flash calculation method (4791)
  • Reinstated a warning message that displays when the Gibbs element matrix is incomplete (4823)
  • Updated the NRTL BIPs for cyclohexane/n-hexane (4830)
  • Added heat of formation data for dehydroabietic acid, CAS No. 1740-19-8/component 1978 (4934)
  • Added UNIFAC subgroups for dibenzothiophene, CAS No. 132-65-0/component 1726 (4949)
  • Added stream vertices to XML output (4967)
  • Added meters of water as a pressure unit in the Engineering Units dialog, for use with Pump UnitOps (4982)
  • Added exception handling for database connection errors (4991)
  • Removed confirmation dialogs that appeared when using CHEMCAD as an OPC server (5020)
  • Changed the behavior of the CHEMCAD License Manager so that it lists expired product licenses as well as available and held licenses (5058)
  • Created new Column UnitOp symbols that can represent either partial or total condensers (5258)
  • Improved the flash algorithm for display of non-feed pure component streams (5293)
  • Added synonym MDEA for component 744 (5323)
  • Improved the flash algorithm for true species at dew point (5344)
  • Improved convergence for equilibrium reactors (5365)
  • Updated properties for lactic acid, dilactic acid, and trilactic acid (5409)
  • Improved the enthaply calcuation for high-temperature, low-pressure water properties (5417)
  • Added the capability to send stream relative humidity data using Excel Data Map (5440)
  • 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)
  • Updated the NRTL BIPs for 1-butanol and 1-pentanol (5666)

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)
  • Improved the TEMA report to consider total pressure drop, including frictional and gravitational pressure drops (2757)
  • 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)
  • Corrected an issue with shell-side pressure drop calculation (4841)
  • Added a forced evaporation downward flow model (4836)
  • 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)
  • 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)
  • Corrected an issue with plate and frame heat exchangers that caused miscalculation of effective area (5547)
  • Corrected an issue where CC-THERM could calculate incorrect stream analysis values (5653)
  • Corrected an issue that could occur with older simulations where heat exchangers had no baffles (5771/5773)

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)
  • Corrected an issue where negative flow in a cut stream prevented the flowsheet from converging (4752)
  • Added more helpful information to the messages a user sees when a dynamic simulation fails to converge (4800)
  • Changed default time units on dynamic plots to minutes (5350)
  • Corrected an issue where a compressor with multiple performance curves did not work properly in a dynamics simulation (5469)
  • Added base component option when plotting % conversion and % selectivity in the Vessel Reactor History plot (5529)
  • Renamed the Batch Reactor UnitOp to Vessel Reactor (5539)

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)
  • Corrected an issue with incorrect pressure calculation of cocurrent heat curve (4812)
  • Corrected several issues with CHEMCAD’s Economics tools (1302/1303/3981)
  • Corrected an issue that could occur when saving reactive distillation specifications (1320)
  • Corrected an issue with the Particle Size Distribution Specification dialog box (1698)
  • Corrected the composition report to properly show standard vapor volume fractions and standard vapor volume percentage (1957)
  • Corrected an issue with the sixth significant digit in user-specified stream values (4341)
  • 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)
  • Corrected an issue where a user-specified reaction in a reactive distillation column could cause CHEMCAD to close unexpectedly (4831)
  • 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)
  • Corrected a rare issue where a mass balance error could occur in a kinetic reactor (5023)
  • Restored the Relief Valve icon to the UnitOp palette (5069)
  • Corrected an issue where a second instance of Excel could be opened in the background by the Data Map feature (5110)
  • Corrected the high temperature bound for sulfur ideal gas heat capacity (5154)
  • Corrected an issue with relief device sizing where calculations could incorrectly reflect all vapor case (5183)
  • Corrected an issue with the Hayden O’Connell model’s minimum eta value not being saved (5195)
  • Corrected an issue where the VBA Unload CHEMCAD function did not work as expected (5217/5218)
  • Corrected an issue with mass balance in the Solid Washer UnitOp (5250)
  • Corrected an issue that could cause a user to lose a SuperProNet or RMS server license while using CHEMCAD (5257/5456/5465)
  • 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 an issue with mislabeled data on the thermosyphon report (5355)
  • Corrected the Larger and Smaller pipe diameter values that display in the pipe sizing report (5337)
  • Corrected an issue with incorrect reporting units for slurry density (5338/5339)
  • Corrected a calculation error in the Beggs and Brill method of the Pipe UnitOp (5343)
  • Corrected an issue with Excel reports failing to separate columns of data (5348)
  • Corrected an issue with calculation of vapor velocity and pressure drop in a thermosyphon reboiler (5356)
  • Corrected an issue with the VBA command PutStreamInCurUserUnitByID (5375)
  • 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 in Pipe UnitOp error checking (5479)
  • Corrected an issue where CHEMCAD could become non-responsive if closed while holding licenses from a License Manager server (5484)
  • Corrected an issue that could occur when editing Data Maps with no execution rules (5491)
  • 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)
  • Corrected an issue where the SCDS initialization option “Reload column profile” could give a false positive convergence (5733)