CHEMCAD NXT Support

CHEMCAD NEW FEATURES AND ENHANCEMENTS

• Added the Azeotrope Report feature, which can search for binary, ternary, quaternary, and quinary azeotropes based on the current simulation component list and selected thermodynamics, returning a list of possible azeotropes (8122) 
• Updated the default tube pattern for CC-THERM shell and tube case from Rotated Triangular (60) to Triangular (30) (8327)
• Updated the thermodynamics grid in the TPXY Chart Settings dialog so that Global thermo is selected by default (7652)
• Created a new interface for easy entry of user-specified heat of solution data (2035)

CHEMCAD MAINTENANCE

• Corrected an issue that caused documents that closed unexpectedly to appear as untitled in the Recent Files list (5032)
• Corrected an issue where the Reid vapor pressure (RVP) calculation could fail under extreme conditions and fail to appear on the stream property report (6952/8304)
• Corrected an issue that, in rare instances, could cause a simulation running in CHEMCAD NXT to become unresponsive (8239)
• Corrected an interface issue to ensure that the VTPR tab is always visible when the VTPR Thermodynamics model is selected (8272)
• Corrected an issue where changing the equipment ID of a previously converged column could cause non-convergence (8276)
• Corrected an issue where using the Save As command without changing the simulation name or location would not save changes (8285)
• Corrected a rare issue where a mass balance warning message could prevent a convergence failure message from displaying (8286)
• Corrected an issue where large or multiple user component databases could cause delays in component-related actions (8301)
• Corrected an issue that could cause CHEMCAD to close unexpectedly when more than 20 data points were entered for a user-specified heat of solution system (3587)
• Corrected an issue with number formatting in Excel reports for users with Hungarian Windows regional settings (8306)
• Corrected an issue where simulation snapshots could create extra flowsheet files (*.flshtcc7), causing an incorrect flowsheet to load (8310)
• Corrected an issue that caused a repetitive warning message to display after each run for a deleted UnitOp previously included in a databox (8311)
• Corrected an issue where a sensitivity analysis could report incorrect calculated heat capacity values when kJ/kg-K engineering units were selected (8334)
• Corrected a rare issue where an unexpected UnitOp selection dialog could interrupt the process of drawing a new stream (8344)
• Corrected a rare issue that could allow the META UnitOp to change values in a subflowsheet that it runs; subflowsheets can no longer save changes after a META run (8332)

CC-DYNAMICS

• Restored missing chart options for displaying a batch column runtime chart (8271)
• Corrected an issue where the DIERS Relief Device Transfer to Dynamic Vessel field could transfer data to an incorrect device type (8340)

CC-THERM

• Corrected an issue where CC-THERM calculated a very high required area during edit of tube-side heat curve (7666)
• Corrected an issue where the DVSL and BREA UnitOp would default to a Cd of 0.953, regardless of relief device type (8291)
• Corrected an issue where CC-THERM did not use the VLLS (three-phase) flag in some instances (8335)

CHEMCAD WEB ACCESS

• Improved protection against data loss in the event that a user’s Internet connection is lost during autosave (8303)
• Reduced the amount of time required to complete the Save As operation (8294)
• Corrected an issue where response time could slow noticeably for large simulations (8289)

CHEMCAD NEW FEATURES AND ENHANCEMENTS

• Implemented a new, integrated Economics package and assigned its controls to a discrete command ribbon (8040)
• Improved the Sensitivity Analysis feature with the addition of random distribution methods (Monte Carlo analysis) and histogram chart tools (7091/8119)
• Added the capability to use a property from an Economics case as an independent or dependent variable in a sensitivity analysis (3561)
• Enabled methods to view and edit cost/price values for flowsheet streams, and provided access to price as a stream property to all aspects of CHEMCAD (145/8086)
• Enhanced the Chemical Engineering Plant Cost index dialog to enable specification of the year (8114)
• Provided easier access to view and update the CEP cost index data, including entry of historical or user-specified values (5891/7878)
• Enhanced the Sensitivity Study tool to allow specification of step size and number of steps (7113)
• Provided the option with the “Run consecutively” setting in Sensitivity Analysis to save the last run results (7664)
• Improved the messaging used to warn users about potential specification errors with electrolyte true species (3472)
• Added a message for the Liquid/Liquid Extractor (EXTR) UnitOp that warns if the extractor reaches a single-phase solution (4326)
• Enabled warnings and error messages created within a user-added model (UAM) UnitOp to persist through CHEMCAD updates (5682)
• Added a message for the Venturi scrubber UnitOp that advises if the liquid and gas streams are not entering the correct inlets (6026)
• Added a status bar message to point out when the [ESC] key can be used to stop calculations (7601)
• Added the capability to bypass VBA installation when installing CHEMCAD (8136)
• Added the simulation path name information to the user-added module API (8158)
• Made moving user components between databases easier (8175)
• Improved speed of Excel report generation (8179)

CHEMCAD MAINTENANCE

• Corrected an issue with local and tray BIPs loading improperly in distillation columns (8220/8221/8230)
• Corrected an issue where formulas from group contribution user components were not recognized by GIBBS reactors (6694)
• Corrected the behavior of the custom Atmospheric Pressure Reference setting in the Engineering Units dialog (7492, 7493, 7974)
• Corrected an issue where the optimization tool could cause CHEMCAD NXT to close unexpectedly (7536)
• Corrected an issue with incorrectly reported zero values on the Zone Analysis report (7859)
• Corrected an issue where the Select Costing tool could produce a report without running the UnitOp and using the most recent specifications (7893)
• Revised and corrected Expander UnitOp polytropic equations (7895)
• Corrected an issue that prevented the component separator UnitOp (CSEP) from successfully running for a simulation with 200 or more components (7904)
• Corrected an issue with the Controller UnitOp’s ability to automatically update referenced stream or UnitOp IDs that are changed in the flowsheet (7907)
• Corrected an issue (introduced with version 8.0.0/1.0.0) that prevented a user added module (UAM) from setting an error condition (7917)
• Corrected an issue where CHEMCAD could close unexpectedly when VBA is not available (7924)
• Corrected a rare issue that could result in a three-parameter BIP regression picking up fourth and fifth parameter values from a previously regressed five-parameter BIP (7934)
• Corrected an issue that caused certain characters to display incorrectly on reports in the Japanese version of CHEMCAD (7960)
• Corrected an issue where the “Display streams by phase” option could cause a stream report to display an incorrect liquid heat capacity (Cp) value (8017)
• Corrected an issue where editing the component list for a Dynamic Vessel (DVSL) with an initial charge could cause the simulation to close unexpectedly (8064)
• Corrected an issue where labels in the Membrane unit ($MEMB.lab) for component/permeance table fields could cause a Data Map to fail (8094)
• Corrected an issue where zero-flow outlets in a Vessel UnitOp could prevent the unit from running as expected (8170)
• Corrected an engineering unit issue in the reported mass flux for the DIERS relief device sizing report (8191)
• Corrected the TPXY gamma value reported at infinite dilution for the Margules k-value model (8195)

CC-THERM

• Made fouling factor available as an engineering unit where relevant (ramp, controllers, sensitivity, optimization, Data Maps, etc.) (3441)
• Added the capability to override fouling factors for a heat exchanger in simulation mode (3471)
• Added a warning in design mode if the baffle settings are not compatible with other design specifications (5018)
• Corrected a calculation issue that could occur when running a design case after a rating case (7946)
• Corrected an issue that could cause a CC-THERM Excel report to display incorrectly (8185)
• Added guidance to the air cooler Bundle specifications dialog to ensure that all required information is entered (8002)
• Added a warning message to prevent pinch in an air cooler (1438)
• Corrected an issue with the air cooler tube length field in the Tube specifications dialog (7979)
• Corrected an issue where an air cooler design case could have the number of tubes reset to zero (8008)
• Corrected issues with air cooler rating causing unexpected updates to a previous design case (8010/8011)
• Added the capability to specify tube bundle width in an air cooler and have the number of tubes calculated (8014)
• Corrected an issue in the heat curve when specifying the face velocity for an air cooler (8041)
• Corrected the finned area/inner area ratio calculation for air cooler (8029)
• Amended the air cooler Miscellaneous Parameters dialog to include the metallic O-ring header gasket type (8174)

CHEMCAD NEW FEATURES AND ENHANCEMENTS

• Created a new CC-THERM ribbon that provides a case-based, streamlined workflow for heat exchanger sizing (7593/7728)
• Provided easy access to all CC-THERM reports and charts directly from the CC-THERM command ribbon (2222)
• Expanded the pipe schedule table to support JIS and DIN standards or a user pipe table (7808/6211/6252/6253)
• Added a context menu for charts with data series-specific options (7483/7760)
• Added the capability to save any displayed data series in a chart as a user series (7474)
• Provided improved access to CEP Cost Index data via the Edit Costing Index ribbon command (5891)
• Added calculated heat transfer area for utility mode to KREA specifications (5194)
• Added the option to select a utility stream for PFR KREA (7847)
• Added KREA UnitOp icons that provide inlets for the thermal mode utility option (6196)
• Changed the behavior of reactors (KREA, REAC, GIBBS, EREA) to use lowest inlet pressure where no reactor pressure is specified (6299)
• Added a 13-stream outlet icon to the Divider UnitOp sub-palette (7631)
• Added ramp information to the Stream and UnitOp Links section of the Topology report (7796)

CHEMCAD MAINTENANCE

• Corrected an issue where column reboiler sizing did not flag CC-THERM process type to a once-through thermosyphon reboiler (1873)
• Corrected an issue with unit operation costing not showing the correct currency (2955)
• Corrected an issue with Stream Reference UnitOp destination stream flash behavior (7737)
• Corrected an issue where the Currency Factor field of the Engineering Units dialog did not accept a decimal point (7771)
• Corrected an issue with inlet temperature calculation for a co-current heat exchanger with a specified number of zones (7802)
• Corrected an issue that could in rare circumstances lead to a blank UnitOp sub-palette (7874)

CC-DYNAMICS

• Corrected an issue that prevented disabling a VBA reaction in a vessel reactor UnitOp (5024)
• Corrected an issue with the RAMP controller not receiving values from an external source such as a sensitivity analysis, controller, or Data Map (7495)

CC-THERM

• Corrected an issue with liquid density displaying an incorrect unit label in the zone-by-zone analysis report (7306)
• Corrected an issue with tube material data not loading properly for a heat exchanger prior to calculation (7417)
• Corrected an issue with CC-THERM calculating incorrect pressure drop for a single baffle (7638)

CHEMCAD NEW FEATURES AND ENHANCEMENTS

• CC-DYNAMICS: Added capability to set step size in user-defined time units (seconds, hours, etc.) for a dynamic simulation (4021)
• Implemented mode 3 (specify pressure out and power, calculate efficiency) for polytropic compressor and expander UnitOps (5567)
• Improved the Select Components search to more easily find a match based on legacy component number (7629)
• Enabled calculation of mean residence time for a pipe with holdup (7719)

CHEMCAD MAINTENANCE

• Corrected an issue with heating values for components with fractional molecular formulas (1592/5296)
• Clarified the way that elevation is used with regard to specifying a relief device (5981)
• Corrected exposed area configuration and calculation issues for relief device fire case API 520/521 under certain circumstances (7514/7515)
• Corrected an issue where CHEMCAD could stop unexpectedly when running a simulation with user-added components and BIPs (7578)
• Corrected an issue that could cause unexpected behavior for CHEMCAD simulations with long file path names (7602/7603)
• Corrected an issue where unnecessary files in the simulation folder could cause CHEMCAD to close unexpectedly (7633)
• Corrected an issue where the pressure drop through a nozzle cross-section could be calculated incorrectly (7672)
• Corrected an issue where a Control Valve UnitOp did not accept user specification of a related PID controller using equipment ID 1 (7677)
• Corrected nominal pipe size values in the pipe schedule table for three unusual pipe sizes (7705)
• Corrected an issue with UnitOp Manipulation of Particle Size Distribution in VBServer (7715)
• Corrected an issue where a simulation with a two-section mass transfer column did not import correctly into CHEMCAD NXT (7749)
• Corrected an issue where in rare cases, the column packing sizing report listed incorrect diffusivity values (7752)
• Corrected an issue with Maurer model flash calculations for a formaldehyde/methanol/water system (7756)
• Corrected the behavior of the user-specified pressure profile option for distillation columns (7765)

CC-DYNAMICS

• Corrected an issue that could cause CHEMCAD to stop unexpectedly while running a dynamic distillation column with a large number of components (7595)
• Corrected an issue that could cause CHEMCAD to stop unexpectedly while running a dynamic simulation using numerous Ramp UnitOps (7637)
• Corrected an issue with the Ramp UnitOp that could prevent a change of component mole/mass flow rate (7645)
• Corrected issues with pipe holdup (7655)
• Corrected an issue that incorrectly calculated conditions for batch column drain holdups (7702)

CC-THERM

• Corrected labeling of CC-THERM criteria design variable (3638)
• Corrected an issue with calculation of heat curve in CC-THERM when using true species electrolytes (7653)
• Blocked potentially confusing baffle-related spacing messages for kettle reboiler and crossflow heat exchangers (3018)
• Corrected an issue where the shell-side temperature for a knockback condenser heat curve did not match flowsheet values (4839)
• Corrected an issue with CC-THERM vibration analysis calculation (4852)
• Corrected multiple issues involving vapor belt (4865)
• Corrected an issue where the Baffle dialog did not read the nozzle inlet or outlet specifications (5001)
• Corrected an issue where CC-THERM calculated an invalid critical velocity (5278)
• Corrected vibration analysis so that it properly accounts for divided and split flows (5326)
• Corrected an issue where design mode baffle spacing results did not transfer to rating mode (5562)
• Corrected an issue where CC-THERM design case reported incorrect baffle spacing values (5563)
• Corrected calculation of tube-side outlet nozzle pressure drop for co-current heat curve (6382)
• Corrected an issue where a vibration warning could cause the CC-THERM Excel report to incorrectly list a convergence error (7724)

CHEMCAD NEW FEATURES AND ENHANCEMENTS

• Updated the TPXY Chart Settings dialog, making it easier to use (7502)
• Added the capability to display multiple Txy/Pxy lines on same TPXY chart (5759)
• Added the capability to compare multiple thermodynamic models and BIP sets on a single TPXY chart (163, 4826)
• Added the calculated azeotrope to TPXY reports (7501)
• Added the mole fraction of a third component, where specified, to TPXY reports and charts (4052)
• Implemented the IAPWS-IF97 method to calculate the density, viscosity, and thermal conductivity of water (5192, 5611)
• Updated the Plot Stream Properties dialog so that the upper and lower temperature bounds are required entries, with estimated ranges suggested for many streams (3405, 7560)
• Improved the performance of the Select Components dialog with faster loading time, a streamlined search process, and the option to sort by CAS RN® number (7353, 4647, 4929)
• Improved the speed of save operations after a run to improve performance for large simulations (7478)
• Improved access and visualization of group contribution data (7506, 7573)
• Added an automatic vibration check in CC-THERM that warns the user if vibration is detected (583)
• Added fugacity, K-value, and activity coefficient (gamma values) to available properties for Sensitivity Analysis and Optimization tools (4741/4744)
• Updated the Thermodynamics report to include a note if the Twu alpha parameters for VTPR have been estimated (6060)
• Implemented UNIFAC group interaction parameters generated from COSMO-RS and COSMO-SAC for many missing group-group interactions, per Ind. Eng. Chem. Res. 2020, 59, 1693-1701 (7475)

CHEMCAD MAINTENANCE

• Corrected an issue in CHEMCAD 8.0 and CHEMCAD NXT 1.0 where DVSL and relief device sizing ignored head depth ratio for hemispherical heads (7523)
• Corrected an issue with the Node UnitOp that could cause unexpected unit IDs to display in the specifications dialog (7562)
• Corrected an issue where CC-THERM did not use the kettle tube bundle specified for the exchanger (5677)
• Corrected an issue where fugacity coefficients were not being reported correctly for local thermodynamics (internal calculations and flowsheet convergence were not affected) (7504)
• Corrected an issue with Data Maps not executing properly during a Sensitivity Analysis run (7580)
• Corrected an issue where CHEMCAD was not calculating solid-liquid formation properly for pure component streams (7524)
• Corrected a rare issue that could occur when switching a Stream Reference UnitOp from column stage to pumparound (7552)
• Corrected operational parameters when calculating the vapor and liquid loads for the Billet & Schultes packed mass transfer method, to more accurately implement the published correlation (7116)
• Corrected an issue where automation could stop unexpectedly when loading a large number of simulations (6998)

CHEMCAD NEW FEATURES AND ENHANCEMENTS

• Implemented the Layers feature to enable selective hiding of flowsheet objects (5902)
• Added a feature to TPXY charts to calculate and display the azeotrope point where applicable (837/7428)
• Added the User Series feature to allow the addition of one or more defined values to an existing chart (6675/7329)
• Added several new properties, including freezing point and API gravity, to the stream property options for sensitivity analysis (5234)
• Added functions to VBA to get and set dynamic run time (4507)
• Added a link to the Chemstations YouTube channel to the File tab commands (7312)

USER-ADDED MODULE UPDATES

• Updated UAM to version 8.0.1 (7438)
  If you use UAM, please contact us to discuss the improvements that this update provides. Recompiling your UAM is not required, but doing so will enable you to use improved features.
• Added the CAS RN® number to CP_RECORD for user-added modules (6532)
• Exposed the calculated activity coefficient to the UAM environment (6594)

CHEMCAD MAINTENANCE

• Corrected an issue with ID number assignment for grouped flowsheet objects (5990)
• Corrected an issue with BIP selection when more than 200 components were added to a simulation (7225)
• Corrected an issue with the Export to Excel CSV feature for the sensitivity analysis chart (7397)
• Corrected an issue in flash calculation where activity coefficients could become extremely small where solids were present (7424)
• Corrected a stream routing issue when using liquid-liquid equilibrium with solids if the stream resolved to a single liquid phase (7427)
• Corrected an issue with the Ramp UnitOp interpolating incorrectly between time zero and the first non-zero data point (7451)

CHEMCAD NEW FEATURES AND ENHANCEMENTS

• Upgraded CHEMCAD’s optimization tools with more robust objective function input, improved calculation, multi-objective optimization, Pareto front visualization, and more reliable global optima
• Added the capability for CHEMCAD NXT to use a multi-core processor to improve calculation speed (4914)
• Rewrote the CHEMCAD calculation engine to improve speed, convergence stability, and thermodynamic calculations
• Implemented the Raschig 2009 packing model as a new packing method for mass transfer column sizing and rating (4169)
• Enhanced the Stream and UnitOp Starting IDs feature to allow entry of alpha-numeric prefix values (6703)
• Added an option to the Sensitivity Analysis report and chart to filter any points that did not converge (4779/7084)
• Added the capability to run a selected UnitOp, a group of UnitOps, or a recycle loop from the OPC client (5801)
• Added the capability for the Meta UnitOp to reference a relative file path to a child simulation (6098)
• Removed limitations on total number of streams that can connect to UnitOps with large numbers of inlet and outlet ports (1061)
• Added the option to export a Data Map (4115)
• Simplified use of the Scale option for the objective function in the Optimization and Data Reconciliation tools (5259)
• Provided easy access to all user-added module (UAM) documentation, libraries, and files in the Chemstations directory (6244)
• Exposed the CHEMCAD solver to the UAM environment (6443)
• Improved reporting of mass transfer HETP for the Billet & Schultes and Raschig 2009 packing sizing methods (6798)

CHEMCAD USER INTERFACE

• Implemented a new ribbon-based command structure for CHEMCAD (5767/6154)
• Increased the limit for stream names to 100 characters (1006)
• Implemented automatic update of relevant UnitOp settings when a referenced stream or UnitOp ID changes (1280)
• Improved the RAMP UnitOp with a grid interface that supports up to 5000 entries and makes it possible to copy and paste data to and from Excel (3522/5241/7360)
• Redesigned the Engineering Units dialog to improve ease of use (4909)
• Implemented a 3-D surface chart for use with the Sensitivity Analysis tool (5056)
• Improved the Control Valve UnitOp specification modes for ease of use (7267/7272)
• Added the capability to select all text boxes and databoxes on a flowsheet with a single click to apply font changes (6686/7030)
• Added the capability to specify a default font for all flowsheet databoxes (7029)
• Added a message in the status bar to indicate when a simulation’s results are converged (366)
• Changed the behavior of the Auto Pan feature so that it remains active until the user turns it off (6181)
• Improved the performance of the E-mail Simulation feature (6255/6939)
• Corrected an issue where the Zoom to Fit feature did not function as expected after flowsheet objects were moved to a new location (6837)
• Made fixed-flow modes in the Divider, Stream Reference, Vessel, and Tank UnitOps consistent and independent of time engineering units (6840)
• Enabled the Snap to Center setting for drawing by default (6870)
• Added numerous drawing tools for use in the main CHEMCAD workspace and the UnitOp Designer tool (5959/6877)
• Replaced the "Run one time step for dynamic simulation" option in Convergence Parameters with an easily accessed command on the Home tab (7012)
• Improved the selection of variables to plot on a sensitivity analysis chart (7088)
• Added a Windows Registry key setting that preserves the user’s palette settings during CHEMCAD updates (7197)
• Adjusted the Edit Streams dialog to prevent overlapping command buttons (7209)

CC-THERM

• Added a zone-by-zone analysis calculation for a sensible-sensible case (2405)

CC-DYNAMICS

• Added full zoom capabilities to completed runtime charts (3897)
• Prevented runtime charts that are closed during a dynamic run from reopening (7081)
• Added the capability for the META UnitOp to run in a dynamic simulation (2386)
• Corrected an issue where the runtime chart in a Batch Reactor dynamic simulation could cause CHEMCAD to close unexpectedly (5052)

CHEMCAD PHYSICAL PROPERTIES

• Added new chemicals from the DIPPR Lite May 2019 and May 2020 databases into CHEMCAD (6993/7327)
• Resolved several entries in the CHEMCAD database where a physical property was incorrectly being calculated from another property’s equation (7045)
• Corrected an error in the specific gravity values of some components (6992)
• Added 3M Novec 649 to the CHEMCAD component database (4944)
• Added Eastman Chemical Co. heat transfer fluids (Therminol) to CHEMCAD database (5604)
• Corrected the Gibbs of formation for boron trichloride (BCl3) and other components (6582)
• Corrected component data for 932 Ammonium Chloride (7053)
• Corrected the DIPPR vapor pressure for 1,3-Diaminopropane (CAS RN® 109-76-2, ID 1875) (7117)
• Corrected the DIPPR heat of formation for 2-Phenyl-2-Propanol (CAS RN® 617-94-7, ID 1440) (7126)
• Corrected an issue that could prevent the molecular weight of a user component from updating as needed when the component’s formula was changed (7022)
• Implemented verification of component CAS RN® number on entry of a user-added component (7273)

CHEMCAD MAINTENANCE

• Added a new option to the Kinetic Reactor UnitOp for counter-current PFR utility calculation of either the inlet or outlet temperature (137/5189)
• Corrected an issue where the User Component report did not include all the Antoine vapor pressure coefficients for a user-added component (4748)
• Corrected an issue with the "Resize the column after each run" option not working for packed columns (4772)
• Corrected an issue where the Excel Data Map feature could not pass a range of cells for data reconciliation (4795)
• Corrected an issue where the Maurer thermodynamic model could predict an invalid enthalpy value for a mixture of nitrogen and oxygen (4903)
• Corrected an issue where the Stream Reference UnitOp did not adjust its own feed stream (5109)
• Corrected an issue where a META UnitOp did not account for a child UnitOp having different thermodynamic settings (5142)
• Corrected an issue where displaying an equilateral triangle plot could cause CHEMCAD to reinstall Windows components (5167)
• Corrected an issue where the Wilson activity coefficient model could flash streams incorrectly when used as a local thermodynamic model (5220)
• Corrected an issue with the Maurer K-value model predicting invalid activity coefficients (5251)
• Corrected an issue where a solid component could be included in vapor/liquid transport property calculations (5558)
• Corrected issues with the Compressor and Expander UnitOps to check actual power and efficiency only when entered by the user (5668)
• Corrected an issue with generation of the Excel interface file when that option is selected for packing sizing (5933)
• Corrected the NTS data that displays in the Excel interface file for packed column sizing (3448)
• Corrected an issue where a closed control valve on a node flowsheet could still show flow in rare circumstances (5973)
• Corrected an issue with mass balance calculation in the Vessel Reactor UnitOp (6049)
• Corrected a Japanese translation issue for the binodal plot (6071)
• Corrected an issue with the VTPR equilibrium calculation that could occur when Water/Hydrocarbon Solubility was set to Immiscible (6202)
• Changed the reference density for automatic estimation of VTPR ci constant (6941)
• Corrected an issue where opening a simulation that used VTPR for local thermodynamics could cause CHEMCAD to close unexpectedly (6695)
• Allowed sizing and cost calculations concurrently with the relevant UnitOps, instead of at the end of the flowsheet run (6260)
• Corrected an issue with the Tray Composition report so that mass fractions are reported (6316)
• Disabled the ports on UnitOp symbols while the Select UnitOps or Select Streams dialog is open, to prevent accidental port connections while clicking on flowsheet items (6322)
• Corrected specific heat conversion calculations for kJ/gmol in the Engineering Units Converter (6332)
• Revised the Heat Exchanger UnitOp costing algorithm for long tubes or falling film evaporator exchanger types (6358)
• Corrected an issue where CHEMCAD could report liquid volume percentage as liquid volume fraction (6370)
• Corrected an issue where the Loop UnitOp did not take local thermodynamic settings into account (6491)
• Added the capability to change the reported engineering units for mass transfer sizing dP/m values (6542)
• Corrected an issue with the Pipe UnitOp that triggered a warning message about the Baker graph under certain conditions (3754)
• Changed the default behavior of the Pipe UnitOp to use the Beggs and Brill method, rather than the Baker method (6821)
• Corrected an issue where a Pipe UnitOp with heat transfer and elevation specified could calculate invalid outlet stream values (7249)
• Corrected an issue where the calculated velocity in the pipe sizing report did not match the flowsheet value (6620)
• Removed support for the SPEAD model (6661)
• Corrected an issue where the Vessel Reactor UnitOp could ignore SLE (6666)
• Corrected an issue where a VLLE Flash UnitOp could ignore SLE in the light liquid phase (6668)
• Corrected an issue where legacy flow units could override a user’s property set selection (6814)
• Changed the extrapolation behavior of the Ramp UnitOp (6824)
• Corrected an issue with reporting of SCDS UnitOp with reactive distillation to report actual reaction volume values (6851)
• Expanded real-time reporting of UnitOp warning and error messages in the Messages pane (6872)
• Corrected a Flash UnitOp issue where running an isentropic flash could cause changes to the calculated entropy value (6878)
• Corrected an issue with some solids handling UnitOps interacting incorrectly with the SLE thermodynamic setting (6907)
• Corrected an issue with the partial pressure calculation when a weight fraction is selected on the TPXY X-axis option (6958)
• Corrected an issue with the Relief Valve UnitOp non-flashing liquid mode option (6975)
• Corrected an issue with the Print Component Data report that could occur with components created using UNIFAC correlation (7129)
• Corrected issues with the TOC/COD tool interface (7152, 7153, 7154)
• Updated the UsrEqn1001.sf file, to provide clearer instructions on creating a user-added transport property equation (7245)
• Corrected an issue that could cause a custom property set with a blank name to unexpectedly close CHEMCAD (7252)
• Corrected an issue where the User Components report output to Excel could skip some lines of data (7258)
• Corrected an issue where Heat Exchanger costing was based on calculated area, rather than zone analysis area, for an exchanger with multiple zones (7264)
• Updated costing index with May 2020 published values (7349)
• Improved convergence for SRK and Peng-Robinson thermodynamic models with supercritical fluids (7357)
• Corrected an issue where the Save As command did not save changes if the simulation name was not changed (7363)