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Recent Modifications to CONTAM 2.4

This page provides a list of the most recent fixes and enhancements of the initially released version of CONTAM 2.4.

ContamW changes | ContamX changes

Date Type Description
Oct 2006 New Feature Gage Pressure and Zone Occupancy Sensors
New Feature Network Deletion (Ducts and Controls)
New Feature Super Source/Sink Element
New Feature Checking WTH and WPC Wind Pressure Data
New Feature New source sinks based on NRCC emission data base - Power Law Model and Peak Model
New Feature New Density Control Parameters
New Feature Multiple Component Deletion
New Feature Added time constant to sensors
Fix Equations clarified for control elements that implement Gain and Scale.
Fix Air mixture data corrected
Feb 2006 Fix Repaired zone volume adjustment calculation performed after changing level height via recently modified Level Data dialog box. Calculation was correct in versions prior to modification of the Level Data dialog box.
Fix Calculate "Absolute Pressure" of Steady State Weather properties every time the user modifies the "Altitude" on the Location tab of the Weather and Wind Parameters property sheet.
Fix Could not delete duct junctions connected both upward, downward and horizontally. Attempts to do so left an undefined junction on the SketchPad.
Fix NS duct segments could be inadvertently created on single-cell length EW ducts.
Fix Program crashed when opening schedules in the Library Manager.
Jan 2006 New feature Enable find/replace of wind-related parameter for paths and junctions
New feature Enable multiple instances of ContamW to be run at the same time
Dec 2005 New feature Generate PLD file when Simulation - Create ContamX file command is executed. Useful for "manual" creation of WPC files.
Fix File - Save As now provides current file name as the default
Fix Update default concentration of species when properties affecting this value are changed.
Nov 2005 Fix Enable placement of contaminant sensors in the ambient zone.
New feature New level data dialog box.
New feature Enable double-click of list items such as day schedules to edit.
Fix Change default terminal loss coefficient from 0.001 to 0.125
Fix Enable use of "F" key to place flow paths in the floor above a zone.
Fix Copy/paste of a level below current level now maintains the height of the copied level.

ContamX changes

Date Type Description
Feb 2006 Critical Fix Corrected the stack pressure calculation for duct terminals which were modified with the introduction of version 2.4. This could have caused airflow oscillations within passive stack ducts, i.e., no forced airflow through the duct, with terminals in the ambient and using CONTAM weather files to affect a varying outdoor temperature.
New Feature ContamX will create multiple CONTAMX2.log files if multiple instances of the program are run concurrently. The file name will be modified to CONTAMX-##.log for up to 20 concurrent instances.
New Feature Provide PRJ file name in title bar of ContamX Simulation Control Dialog box. This will also be displayed in the Windows Task Bar.
Fix Corrected error determining max contaminant concentrations while reading WPC file.
Dec 2005 Fix Mass of contaminants leaving the conditioned zones was being incorrectly reported in the CSM file.
Fix Removed "Max relative imbalance" message when air change rates are "very low."
Nov 2005 Critical Fix Contaminants of WPC files were not being accounted for during simulation.
Critical Fix Interpolation of contaminant concentrations was not taking place between records in CTM files.
New feature Created new 2.4 WPC file format that allows for the specification of wind pressures as opposed to the absolute pressure at the paths.  The old 2.1 format is still valid too.
Fix Enable use of DVF and WPC files in the same simulation.