CHEMCAD MAINTENANCE

• Corrected an issue with the licensing system that could cause non-seat licenses to become disabled under recent versions of CHEMCAD 7 (7146)

CHEMCAD MAINTENANCE

• Corrected an issue where CHEMCAD 6 and CHEMCAD 7 could give different warnings when using VBA (6908)
• Corrected issues with the RVAL UnitOp for a pure component relief scenario (6975/6988)

CHEMCAD MAINTENANCE

• Corrected an issue where a flowsheet with consecutive recycle loops could in some cases skip calculation of certain UnitOps, leading to inaccurate results (6909)
• Corrected an issue where a very large Kinetic Reactor UnitOp, with small step size and a small number of dynamic steps, could in some cases reach a false convergence (6724)

CHEMCAD NEW FEATURES AND ENHANCEMENTS

• Improved the ability of the Pipe UnitOp to handle reverse flow (6953)

chemcad new features and enhancements

• Created a new Orifice UnitOp, which is distinct from the Pipe UnitOp (6562)
• Improved the user interface for the Billet & Schultes method for packed column mass transfer (2019, 2721, 2893)
• Added a fully customizable Title Block feature, which improves on the Job Box tool from CHEMCAD 6 by placing a formatted "revision box" with editable text prompts on the flowsheet (5874)
• Added the option to plot partial pressures to the TPXY Plot feature (6067)
• Updated the Hydrocarbon Correlation dialog to show three methods for the ASTM D86-TBP Interconversion Methods section: Chemstations, API 3A1.1 (1982), and API 3A1.1 (1994) (4377/6537)
• Added a Boolean comparison function for feed-forward controllers (6415)
• Added a help topic for packed column mass transfer (4256)
• Improved performance curve interpolation for the Compressor and Expander UnitOps (6350, 6376)
• Added the capability to generate the formula for a newly added component from its subgroup information (6004)
• Added F-Factor calculation to column sizing and tray property reports (6028)
• Added the capability for a feed-forward controller to run as a scheduling UnitOp, similar to a RAMP (6344)
• Improved calculation speed for some dynamic flow networks (6375)
• Upgraded to version 7.6.9 of Sentinel Protection Installer (6384)
• Changed the name of the “Regular VLE mode” column simulation option to “Equilibrium model” (6511)
• Updated the COM interface to make the SAFT and VTPR parameters accessible with the GetData/PutData functions (5780)

CHEMCAD MAINTENANCE

• Corrected an issue with the display of values in the SCDS Mass Transfer dialog (5346)
• Corrected calculation issues with relief device hemispherical heads (6458)
• Corrected the calculation of partial liquid level for hemispherical heads on dynamic vessels (6508)
• Corrected an issue with specification of Overall U in the Heat Transfer tab of the PIPE UnitOp specification dialog (3090)
• Corrected an issue where vapor Z factor was not reported correctly in Excel for local thermodynamics (5956, 6466)
• Corrected an issue that could cause the flowsheet canvas size to change when a simulation file was re-opened (6007)
• Corrected an issue with the pressure calculation for VLLE in dynamic vessels under certain conditions (6334)
• Corrected an issue with pipe orifice handling of choked flow in node networks (6359)
• Corrected an issue with input checking for the Compressor and Expander UnitOps (6369)
• Corrected the list of Expander UnitOp variables accessible for use with the Data Map, Sensitivity Study, and Optimization features (6371)
• Revised the tube-side pressure drop equation used in CC-THERM for SMXL Koch-Glitsch turbulator (6456)
• Corrected an issue with calculation of cricondentherm and cricondenbar values for immiscible water/hydrocarbon systems (6464)
• Corrected a minor issue with the Billet and Schultes method affecting load limits (6465)
• Corrected an issue in CHEMCAD's optimization feature where a twelfth constraint, if entered, was ignored (6509)
• Corrected a minor calculation error in HTU for Billet and Schultes and Raschig mass transfer models (6523)
• Corrected an issue with vapor phase correction in the Hayden O’Connell model, which in some cases led to incorrect calculation of the BIP parameter eta_ij (6534)
• Corrected an issue where the PIPE UnitOp incorrectly calculated bore size for an orifice with two-phase flow (6611)

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)