Product Release Information - EtaPRO Technical Support

EtaPRO Performance Monitoring, Diagnostic, and Optimization System

Virtual Plant Change Log

EtaPRO 9.1.6 - release 10.20.2008

Virtual Plant integrated into EtaPRO 9.1. See EtaPRO changel log for Virtual Plant changes.

Version 1.1.12.0 - release 10.17.2007

Corrected the HP efficiency (GER-2007C, 19662 GL) calculation. The efficiency correction for volume flow was not being applied correctly.
Corrected the IP efficiency (GER-2007C, 19662 GL) calculation. The efficiency correction for volume flow was not being applied correctly.
Added a default boiler efficiency of 85% to the auxiliary boiler component.
Fixed a unit conversion error in the wet bulb temperature calculation for the model based gas turbine component.
Added additional initialization code to the generic heat exchanger component.
Updated how the specific heat was being calculated in the generic heat exchanger component.
Corrected an issue with the combo boxes for the pump curve based calculations.
Fixed heat output assignments for the source/sink component.
Updated the HTML reports to support non-English units.

Version 1.1.11.0 - release 7.3.2007

Updated boiler component to support once-through supercritical boilers.
Updated 1997 Steam properties DLL.
Introduced several changes in OPC server related to a custom desalinization optimizer.
Updated HRSG component to calculate efficiency using fuel LHV instead of fuel HHV.
Added a current data button to the OPC server.

Version 1.1.10.0 - release 4.20.2007

Corrected an issue in the Virtual Plant OPC Server that would cause data acquisition failures if a user viewed the configuration form and then hit the cancel button. This issue would typically occur after a user changed engineering units in EtaPRO.

Version 1.1.9.0 - release 4.18.2007

Corrected an issue in a desalinization project custom optimizer.

Version 1.1.8.0 - release 4.18.2007

Corrected a unit conversion issue in the Virtual Plant OPC Server.

Version 1.1.7.0 - release 4.16.2007

Updated OPC server so that it always runs as a Windows service.
Added an option to the OPC Server and Cycle Builder to solve for gross generation if the model contains a single boiler, HP turbine, and IP turbine.
Added a custom optimizer for a desalinization project to the Virtual Plant OPC server.
Updated the OPC server so that individual cases can be shutdown by setting an OPC item called 'Case Online'.
Corrected several threading issues in the OPC server.
Updated the OPC server so that the XML file used for storing unit conversion information is stored under documents and settings. This prevents unit conversion information from being lost whenever a user reinstalls the OPC server.
Corrected an issue in the OPC Server that could prevent proper data acquisition on EtaPRO 9X systems.
Added missing coal and fuel oil data to the OPC Server.
Added missing profit and cost data to the OPC Server.
Updated the packing component to ensure it has zero outlet flows when there is no inlet flow.
Fixed an issue in the valve component.
Fixed a unit conversion issue on the air cooled condenser form.
Corrected issues that prevented HTML reports from working in the Cycle Builder and What-If.
Updated calculations in the model based gas turbine component.

Version 1.1.6.0 - release 2.1.2007

Corrected issues with update check in standard installation. Version incremented for further validation.
Added a DLL needed to support a security dongle to the Click Once deployment routine.

Version 1.1.5.0 - release 1.31.2007

Version number incremented to validate Click Once distribution, build routines, and update check routines.

Version 1.1.4.0 - release 1.31.2007

Added support for Click Once distribution.

Version 1.1.3.0 - release 1.30.2007

Internal release for testing.

Version 1.1.2.0 - release 1.23.2007

Replaced steam properties DLL's with newer versions.
Corrected an issue in the data grids for 2D and 3D curves. If a comma was used as a decimal separator, the grids failed to display information correctly.
Several changes related to a custom What-If control panel for a desalinization project.
Corrected issues associated with acquiring data from EtaPRO version 9.0.

Version 1.1.1.0 - release 12.7.2006

Corrected an issue associated with old links not being deleted when dragged and dropped links.
Added a routine to locate and delete dead links missing from cycle builder diagram. These links were generally the result of the issue identified above.
Corrected a file permission error in the custom script compiler.

Version 1.1.0.0 - release 12.1.2006

Initial release of Virtual Plant version 1.1. - Key modifications consist of upgrading to .NET framework 1.1 and the addition of license checks for EtaPRO version 9.0

Version 1.0.42.0 - released 10.6.2006

Miscellaneous changes to custom control panel for desalinization project What-If.
HRSG duct burner #2 fuel button is now clickable.
Updated control point component to set outlet concentration equal to inlet concentration.
Modified iteration routine to exit if a NAN occurs for heat error.
Added code to shut down HP turbine component when it receives zero throttle flow.
Corrected a bug in the IP turbine inlet pressure calculation. The design inlet N2 packing flow was not be accounted for.
The specific volume for the pump component was be calculated at 59 Deg. F instead of its actual pressure and temperature.

Version 1.0.41.0 - released 7.12.2006

Added code to shut down condenser when there is no steam or drain flow.
Corrected steam splitter and mixer issues in the heat transfer boiler model.

Version 1.0.40.0 - released 7.10.2006

Internal release only.
Added information splitter component.
Added auxiliary boiler component.

Version 1.0.39.0 - released 6.5.2006

Internal release only.
Added a header component.

Version 1.0.38.0 - released 6.4.2006

Corrected a bug in the heat transfer boiler model that prevented if from operating if the last steam section component is part of the furnace (radiation section).
Modified curve based gas turbine design corrections for barometric pressure (altitude).

Version 1.0.37.0 - released 5.25.2006

Internal testing release only.
Corrected errors on the HRSG heat release curve display.
Changed label on unit conversion form from 'Parts' to concentration.
Corrected spelling errors on forms.
Added power information nodes to the generator and gas turbine components.
Updated heat source/sink component so that heat input and flow can be scheduled based on information node data.

Version 1.0.36.0 - released 5.23.2006

Release of Virtual Plant OPC Server only. Corrected an issue that prevented data that is stored in arrays from being set. (Example: Condenser Pressure)

Version 1.0.35.0 - released 5.5.2006

Release of Virtual Plant OPC Server only. Corrected an issue related to handling of handles for OPC Items. This issue resulted in data flat lining after modifying the OPC server configuration.

Version 1.0.34.0 - released 5.4.2006

Release of Virtual Plant OPC Server only. Corrected threading issues that caused OPC server to crash following configuration changes on some systems.

Version 1.0.33.0 - released 4.28.2006

Corrected bugs on the furnace tab of the boiler form. Check boxes for selecting radiant reheater and superheat division panels did not work.
Corrected a bug in the boiler related to trisector air heaters. Air heater inlet temperature was not set if trisector air heaters were used.
Corrected a bug that prevented UA Adjustment factors for air heaters from being applied.
Added a single effect evaporator (desalinization) component.
Moved label for auto updates to the bottom of the cycle builder form so that it is visible on lower resolution monitors.
Added the word 'Version' in front of the version number on the cycle builder form.
Corrected a bug in the WhatIf that prevented models from being saved if you added multiple models and then deleted one.

Version 1.0.32.0 - released 4.04.2006

Correct bugs in the curve based gas turbine part load calculations for exhaust flow and exhaust temperature. Part load exhaust flow and exhaust temperature were being corrected using current base load instead of design load.
Fixed check in curve based gas turbine so that part loads greater then current base load cannot be entered.
Corrected a bug in the curve displays that prevented curves families with a single point curve from displaying.

Version 1.0.31.0 - released 3.21.2006

Additional changes in What-If related to a custom control panel for a desalinization project.

Version 1.0.30.0 - released 3.20.2006

Corrected a bug in the Virtual Plant What-If that would prevent models from loading if you added multiple models and then removed all of them.

Version 1.0.29.0 - released 3.14.2006

Added a controlled gas splitter component.
Corrected a bug in the heat rate calculation for combined cycle plants. Heat input for second duct burner in HRSG was not being calculated.
Revised result text for HRSG temperature profile.
Added HRSG sprays to results list.
Additional changes to a custom control panel for a desalinization project.
Changed default for the display of the linear optimizer from false to true for the What-If.
Disabled menus, buttons, and zooming in the What-If whenever calculations are running.

Version 1.0.28.0 - released 2.23.2006

Improved the generic heat exchanger component by adding code to allow outlet flows to propagate backwards.
Corrected a bug in the pump component that caused an incorrect bleed enthalpy to be calculated when bleed flow is equal to zero.
Additional changes to a custom control panel for a desalinization project.

Version 1.0.27.0 - released 2.12.2006

Corrected a bug introduced in 1.026.0. Bug prevented curve based gas turbines from functioning properly in base load mode.

Version 1.0.26.0 - released 2.10.2006

Fixed unit conversion errors in cost and revenue calculations.
Added a switch to the HRSG form to bypass all gas flow (Simple Cycle Operation).
Added an additional calculation mode for the generic heat exchanger component.
Modified the parametric study to allow it to handle array variables.
Modified the source component form to use a combo box instead of radio boxes for selecting fluid costs.
Modified the gas turbine to use design load instead of base load for part load corrections.

Version 1.0.25.0 - released 1.31.2006

Internal release only.
Additional changes in What-If related to a custom control panel for a desalinization project.

Version 1.0.24.0 - released 1.31.2006

Internal release only.
Additional changes in What-If related to a custom control panel for a Desalinization project.
Added cost and revenue calculations to the cycle builder and What-If.
Added additional variables to the tree-view selection form used in the What-If.

Version 1.0.23.0 - released 1.26.2006

Internal release only.
Additional changes in What-If related to a custom control panel for a Desalinization project.
Added units for energy cost, mass cost, and volume cost.
Fixed bugs in OPC server that prevented points from shifting to off-line quality when model groups shift.
Added ability to display multiple What-If cycles.
Changed location of the What-If configuration file so that the default cycle is loaded program upgrades.

Version 1.0.22.0 - released 12.18.2005

Corrected an error in the Virtual Plant installation routine that prevented calculation scripts from running.
Added steam properties calls to calculation scripting.
Made cycle level variables available to calculation scripting.
Added code to ensure that calculation scripts compile whenever a cycle is loaded.
Revised calculation scripts to load only when modified rather than on every single calculation iteration.
Moved the calculation script button from the calculation order form to the calculation form.
Updated calculation script form to be resizable.
Added code to prevent proper initialization of pressures and enthalpies around generic turbines, steam seal regulators, and gland exhaust condensers.
Added code to prevent generic turbine components from running during initial iterations with small flows. Without this code, the cycle could be seeded with invalid numbers that could prevent convergence.
Corrected a bug in the IP-LP turbine component that would prevent cycles with large admissions from converging to tight tolerances.
Added code that 'cleans' nodes by cycling through them and setting them to zero if they contain #NAN or #Inf instead of real numbers. This is done prior to any single run.

Version 1.0.21.0 - released 12.09.2005

Added code to the HRSG component that ensures all actual data variables are cleared prior to initialization. Without this code, the HRSG could fail to converge after a gas turbine is taken off-line and then put back on-line.
Added code to the HRSG component that forces it to reinitialize if a gas turbine is taken off-line and then put back on-line.

Version 1.0.20.0 - released 12.07.2005

Corrected a bug in the controlled splitter component's pressure calculations. Inlet pressure was calculated as the weighted average of outlet pressures instead of the maximum outlet pressure.
Corrected a bug in the controlled splitter component form. An error was generated if the small negative value was calculated for one of the percentages. This could occur because of round off errors associated with using double precision variables.
Corrected a bug in the heat transfer boiler model form. The form would generate errors after you edit an item in the B gas path.

Version 1.0.19.0 - release 12.03.2005

Added a gas source block.
Added a power takeoff component (mechanical splitter).
Added a power input component (mechanical mixer).
Modified the controlled splitter component to contain flow information nodes. The information nodes can be used to control the flow split in lieu of attaching a controlled splitter to a controlled mixer.
Added a flow information node to the control valve component. Added several additional curve based control schemes.
Modified the makeup component to contain a design value that can be used for initialization purposes when attaching it to a source component.
Resolved a bug that prevented the "Evap with DA" sections from being displayed in Virtual Plant.
Performed code cleanup throughout Virtual Plant in order to deal with issues that will prevent an upgrade to version 2.0 of the .NET framework.
Corrected an issue in the cycle loading routine. The bug was introduced in 1.0.17.0 by adding code to allow modes generated using .NET framework 1.1 SP1 to load on computers without the .NET framework service pack.

Version 1.0.18.0 - released 10.21.2005

Corrected a bug introduced in 1.0.17.0. The WhatIf fossil control panel would load for combined cycle plants.

Version 1.0.17.0 - released 10.21.2005

Added textboxes to the WhatIf fossil control panel to allow oil and gas flows to be entered.
Fixed a bug in the heat transfer boiler model that prevented it from running with oil and gas.
Modified the form for the heat transfer boiler so that the color of the text in the list boxes for the boiler steam and gas path would be lighter when selected.
Added a serialization surrogate for deserializing sorted list collections. This allows models build with .NET framework 1.1 SP1 to run on .NET framework 1.1.
Added code to the heat transfer boiler that forces it to reinitialize itself if NAN's are generated during a run.
Added a custom control panel for a Desalinization project. This panel will only appear for the given project.
Added code to the WhatIf so that it will prompt you to save the model when you close it.

Version 1.0.16.0 - released 9.7.2005

Fixed a bug in the heat transfer boiler component that prevented a mass balance around the steam drum. This resulted in errors for any boiler that have evaporator tube banks.
Fixed a unit conversion error in the heat transfer boiler preheater.
Modified the boiler efficiency calculations to show both fuel efficiency and gross efficiency. Added a preheat credit to the loss method calculations.
Modified the auxiliary steam drum leak off so that it works properly with components that specify a demand.
Added buttons to overall plant data coal form that can be used to estimate coal LHV and HHV.
Fixed several errors in the What-If optimizer that occurred as a result of updating the Farpoint spread control. These errors prevented optimization studies from being saved.
Added calculations for taking mechanical draft cooling tower cells in and out of service.

Version 1.0.15.0 - released 8.11.2005

Modified the heat transfer boiler calculations by added dampening factors to superheat outlet enthalpy and reaheat outlet enthalpy. This resolved convergence problems related to boiler calculation instability.
Tightened the convergence tolerances used in the heat transfer boiler calculations from .5 Deg F to .2 Deg F.
Modified the test form for the heat transfer boiler to keep the last set of values entered on the form.
Modified the test form for the heat transfer boiler to use a copy of the boiler object instead of the boiler object. This prevents test modifications from changing actual boiler component data.
Fixed the gland exhaust condenser component. Drain enthalpy was not saved when exiting form.
Fixed the What-If point selection form. The form was displaying component internal variables that should not have been displayed.
Fixed the What-If point selection form so that it would show units of percent.
Corrected a bug in the What-If interface that resulted in errors being thrown if the variable being displayed was not setup to support unit conversions.
Corrected a bug in the boiler that cause an error to be displayed in a user deleted a linkage to the hot or cold reheat nodes before opening the data form.
Modified the pump component so that the pressure and enthalpy is always set on the interstage bleed. This was done so that the interstage bleed can be used for supplying boiler spray flows for heat transfer boilers.
Fixed the selection form for EtaPRO data acquisition. The form was displaying component internal variables that should not have been displayed.
Fixed the What-If point selection form so that it would show units of percent.
Added an additional fossil example cycle to base install package. A fresh reinstall is needed to obtain this example.

Version 1.0.14.0 - released 8.2.2005

Updated steam table functions to allow use with seawater in distillation plants.
Added a multiple stage desalination component.
Updated closed feed water heater to allow use with seawater in distillation plants.
Updated open feed water heater to allow use with seawater in distillation plants.
Source component updated to contain salinity input.
Makeup component updated to contain salinity input.
Splitter updated to handle seawater.
Mixer updated to handle seawater.
Pump updated to handle seawater.
Temperature control valve update to handle seawater.
Corrected multiple bugs in the temperature control valve component.
Corrected a bug in the data What-If data input control that caused problems when inputting percentages.
Modified HRSG evaporator sections to be more robust.
Updated version of Metadraw custom control used in What-If. This will affect backward compatibility of graphic files.
Updated version of Farpoint Spread control used in both the Cycle Builder and the What-If.

Version 1.0.13.0 - released 5.20.2005

Corrected a bug in the Virtual Plant What If. If you printed a graphic and then saved the cycle, the graphic would be saved as a bit map file instead of a metafile. This caused the cycle file to expand to sizes in excess of 50MB. Upon reloading the graphic would be unusable.
Corrected bugs in the text properties dialog. Font sizes and styles were not being displayed or preserved.
Revised licensing checks done on startup. Virtual Plant now attempts to read an EtaPRO server name from the EtaPRO client's INI file before prompting the user to enter a server name.
Corrected a bug in the IPLP Turbine component. It would fail to calculate if there no extractions.

Version 1.0.12.0 - released 5.11.2005

Corrected a major error in the detailed boiler calculations. If a splitter was placed in the gas path, the gas data was not transferred from the furnace to the convection section. This error was introduced in 1.0.11.0.

Version 1.0.11.0 - released 5.6.2005

Added routine for damper reheat control to detailed boiler calculations.
Fixed the routine for double furnace reheat control in detailed boiler calculations.
Fixed missing reference errors on detailed boiler form.
Fixed errors in detailed boiler pressure drop calculations.
Fixed errors in linkage code for detailed boiler calculation. Splitting the steam path would prevent detailed boiler from working in many cases.
Added code to clear boiler section variables after a failed run. If these variables were not cleared, the boiler could not recover from a convergence failure in some instances.
Fixed a dampening factor used in the detailed boiler calculations. This dampening factor could prevent the cycle from converging when a detailed boiler is attached to an HP turbine that uses sliding pressure calculations.

Version 1.0.10.0 - released 3.29.2005

Corrected an error in the condenser HEI calculations. Drain duty was not accounted for properly.
Corrected a problem with the auto updater code. The Windows installer would try to automatically repair Virtual Plant if the 1.0.0.0 subdirectory was deleted during the update.

Version 1.0.9.0 - released 3.25.2005

Added steam properties calculation buttons to HP and IPLP turbine forms.
Added steam properties calculation buttons to HRSG form.
Added a steam cooler to the curve based gas turbine.
Added additional information to the results display for heat transfer boiler air heaters.
Fixed a bug on the flow diverter form that prevented curve input grids from showing in some cases.
Fixed a bug that prevented string results from being displayed on the cycle builder form. This bug caused errors to be generated every time a HRSG ran if the result string containing the gas temperature profile was selected.
Fixed a variety of issues related to the saving and loading of gas turbine curves.
Revised HRSG evaporator calculations to better handle subcooled inlet conditions.
Corrected labeling of HRSG nodes.
Fixed text labeling on the controlled splitter form. The form read 'Outlet' instead of 'Inlet'.
Fixed the turbine cycle heat rate calculation for cases where auxiliary steam is taken from the boiler.

Version 1.0.8.0 - released 2.23.2005

Fixed a bug on the boiler form that prevented the air preheater drain enthalpy from being saved.
Fixed a bug on the boiler form that made it impossible to delete the air preheater.
Added an auxiliary steam node to the boiler component. This node allows auxiliary steam to be taken from the boiler drum.
Added a flash tank component to virtual Plant so that boiler blow down systems can be modeled properly.
Fixed several problems related to printing.
Fixed a bug on the boiler form. If a user created a convection heat transfer section with the same name as a radiant heat transfer section, the boiler calculations would never converge.
When calculating boiler feedwater flow, the reheater spray flow was being incorrectly subtracted from the superheat steam flow.
Added the ability to show 'Plant' data on the cycle builder display. This data includes heat rates.
For the IP-LP turbine component, if separate IP-LP section efficiencies are used, the 1962GL calculations for the IP section did not work.
For the IP-LP turbine component, the efficiency multiplier was not applied if separate IP-LP turbine efficiencies were entered.
For the condenser component, the mechanical draft cooling tower curves were not saved unless a user selects and then deselected each curve.
For the pump component, the motor efficiency text box was inaccessible if simple pump calculations were specified.
For the HRSG, if a pressure level only had a single superheater section, a spray could not be added.
An auxiliary steam leak off was added to the DA component.
For the DA component, the option "Steam Pressure Throttle, Steam Flow Calculated" did not work.
When changing the type of exhaust loss calculations to "Use GE Published Curves", the text box containing the last stage area did not update.
The cycle builder would not launch from the WhatIf or the OPCServer because of licensing changes made in 1.0.6.0.

Version 1.0.7.0 - released 1.25.2005

Added process industry (hydrocarbon) thermodynamic routines. These routines are not currently functional. They will be enabled during an upcoming release of a process industry version of Virtual Plant.
Revised the cycle initialization routine. The existing calculation routines needlessly reinitialized the cycle multiple times prior to each run. Components are now only initialized the first time you run the cycle after loading it from a file or if the calculations fail to converge.
In order to support the process generation industry the grids used on the results form had to be replaced.
The HTML reports required Internet explorer to work. The HTML reports now use the default browser.
HTML reports were missing cascade style sheets. This caused them to have no formatting. The cascade style sheets have been added into the Virtual Plant executable as embedded resources.
The HP Turbine components constant inlet pressure was being saved as a short instead of a double. This prevented pressure changes less than 1 psi from being made.
A problem with the launching of the EtaPRO transfer component was corrected. In some cases, a message was displayed that indicated an invalid user ID was being used would be displayed whenever Virtual Plant was run on the same computer as the EtaPRO server.
The application shell used by Thinstall would cause an unhandled exception error to be displayed when you tried to view HTML reports on some computers. VP has updated to not use the Thinstall shell when launching reports.
The parametric study form would not allow result to be displayed for nodes.
The variable selection form for the parametric study was revised to have adequate space for showing variables.
The variable selection form for the parametric study was revised to prevent the selection of results and node data for model inputs.

Version 1.0.6.0 - released 12.14.2004 (First Public Release)

Revised the installation should that it will not try to repair the software after an automatic update. In order to get this fix you must uninstall Virtual Plant and reinstall it since the problem is in the Windows Installer MSI file, not the virtual plant executable.
Added licensing to the Virtual Plant. Virtual plant is now crippled if the user cannot connect to EtaPRO or does not have a Dongle.
Modified auto updater to go to password protected website (http://epsupport.gpworldwide.com/updates/vp

Beta Build on 12.10.2004

Added "Automatic Updater" code to the What-If and Cycle Builder. This code will automatically update the software whenever updates become available. Code will only work if the user has World Wide Web access to the internet.
Removed OPC Server fromt he standard install. It is not practical to support "Automatic Updates" for the OPC Server. The OPC Server will be provided with a separate installation routine.

Beta Build on 12.8.2004

Added an inlet temperature bias setting to the model and curve based gas turbine components.
Added an efficiency adjustment ratio box to the generic gas turbine component.
Fixed input problems on the curve based gas turbine form.

Beta Build on 11.29.2004

Modified the IPLP turbine component so that separate IP and LP section efficiencies can be used.

Beta Build on 11.22.2004

04 Fixed bug in IP Turbine efficiency calculations that resulted in the UEEP not being calculated if the user specified a constant IPLP efficiency.

Beta Build on 11.19.2004

Added IP Turbine efficiency calculations to the IPLP turbine component.

Beta Build on 11.18.2004

Fixed a serialization bug in the HP and LP packing components. This bug was introduced on 11/15/04 and prevented the packings from loading.
Revised the district heater to use info nodes instead of mechanical nodes for matching flow with other heaters.
Revised the makeup component and source component to have a info link instead of a mechanical node.
Reviewed loops throughout virtual plant and made sure that they all have checks that allow code to exit if the code contained in the loop does not converge.
Reduced maximum loop count for main HRSG loop from 200 to 100. This prevents long pauses if the HRSG calculations fail to converge
Revised the graphics for the condenser. The drain cascades were not drawn correctly.
More FXCop related cleanup in components project.

Beta Build on 11.15.2004

Added code to all components and to base component to clear results variables during reset and initialization.
Modified cycle node spot to middle instead of to left.
Added code to redraw components on canvas after a load.
Fixed bug in link flag form that caused a flag to be drawn whenever you loaded the form.
Lots of FXCop related cleanup in components project. Additional cleanup will be done in the future.
Resaved cycle demo models so that they reflect latest changes.
Fixed a unit conversion related error that would prevent forms from loading if you selected kg/cm^2 as the units for differential pressure.

Beta Build on 11.12.2004

Added an 'Info' link type to the nodes. This node is for use in control schemes.
Added a steam/water control point. This allows the conditions at any point in the cycle to be read into another component using 'info' nodes.
Revised the generic heat exchanger component to use an info node to limit the maximum hot or cold flow.
Corrected miscellaneous bugs in district heater.
Added additional dampening to district heater.
Went through all component forms and made sure that the unit labels are large enough to hold the unit descriptors.

Beta Build on 11.9.2004

Fixed calculation order yet again. Code would throw an error if a node was not attached to a component (half finished cycle).
Added dampening and tighter convergence checks to district heater component.

Beta Build on 11.8.2004

More fixes to the calculation order

Beta Build on 11.2.2004

Updated district heater so that it calculates the extraction pressure when "Use Upstream Component" flow is selected.
Added a mode to the district heater that causes the extraction pressure to be throttled in order to obtain a feed water outlet temperature set point.
Completely rewrote code used for determining the component calculation order.
Added a calculation order form. This form allows the calculation order to be manually revised.
Initialization checks on components would prevent them from calculation if any inlet flows were negative. We now allow flows to go negative.
Miscellaneous minor bug fixes in the district heater component.

Beta Build on 10.20.2004

Corrected a bug in the 'acquire data from EtaPRO' feature that prevented cycle from being saved.
Fixed font issues in the cycle builder.
Included a copy of the .NET SP1 redistributable on the distribution CD.

Beta Build on 10.1.2004

Corrected a bug in the Gas Turbine and heat rate calculation. This bug prevented the cycle from converging if a model based gas turbine is off-line.

Beta Build on 9.22.2004

Modified the graphics for splitters and mixers to show a marker designating the first input or outlet node.
Fixed the descriptions for the splitter and mixer nodes. ndInlet0, ndInlet1, ... is now Inlet No. 1, Inlet No. 2, ....
Updated the What-If to use a new version of Bennet-Tech's Metadraw control
Replaced the eLog, logging class. Replacement class will integrate better with EtaPRO.
Corrected bugs on the grid for 3D curve input. This bug prevented you from making changes to gas turbine correction curves once they were entered

Beta Build on 9.12.2004

Used Thinstall to impose a license timeout of 12/31/2004
Updated Northwoods control to version 2.2.1.1
Added a banner to the installation dialog boxes.

Beta Build on 8.19.2004

Added an example What-If cycle file. Fixed the What-If form label to read "Plant Model" instead of "Ameren What-If Plant Model".

Beta Build on 8.12.2004

A stop statement was left in the error handler for the HRSG drawing routine. This stop statement was removed.

Beta Build on 8.11.2004

Added code to HRSG to zero spray and recirculation results during initialization. Without doing this, the HRSG would fail to calculate after any cycle convergence problems

Beta Build on 8.9.2004

Corrected a bug which prevented cycles from resetting after a failed convergence.
Put demo cycles that were contained in original cycle builder installation back into combined Cycle Builder/What-If installation.

Beta Build on 8.7.04

Went back to older Metadraw control. Bennet-Tech sent us an e-mail indicating that newer control is seriously flawed and breaks every graphic it opens.
Fixed a bug in the IP-LP turbine section. When admissions were introduced, the downstream stage efficiencies were calculated incorrectly. This resulted in a seriously flawed answer.

Beta Build on 8.3.2004

Fixed live data feature mentioned above
Rebuilt so that there is an icon in the uninstall panel

Beta Build on 8.2.2004

Combined What-if and cycle builder installations
Added feature to allow data to be pulled from live EtaPRO systems
Upgraded version of Metadraw control
Added a graphic auto update feature to the What-If