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PROTO-Series FAQs
How can I demonstrate that the software has been properly installed and running correctly?
All the Zachry software includes a VERIFY file that can be used to show that the program is running correctly. Simply open the VERIFY file and compare the results to the results shown in the User Documentation. The results should be identical. With PROTO-FLO, the user can run the PFloBenchmark.exe utility after running the VERIFY calculation. The utility will perform an electronic comparison to verify benchmark output and produce a Benchmark Report documenting any differences. Problems should be reported to ZACHRY NUCLEAR ENGINEERING in accordance with the procedure outlined in Product Support / Reporting Problems.
What does the error message “Feature not found” mean?
All the Zachry software is configured with the Sentinel HASP Licensing tools. When you receive this error message it is most likely an indication that you are not connected to your license server. You can check available licenses via the Sentinel Admin Control Center (http://localhost:1947). Under the Options menu, you can check which Features are available. Also, under the Options menu, you can update your Configuration. Under the "Access to Remote License manager, you can check to see if Allow Access to Remote License Managers is checked or input the name of your License Server in the Remote License Search Parameters text box.
Can I export my PROTO-FLO output to Excel?
Yes. There are several ways to do this, but the easiest way is to use User Defined Reports on the Outputs tab which allows the user to custom design reports for pipe data, node data, pump data, valve data, heat exchanger data, and trended data. When you click the button, you will be
presented with configurable grids which can be exported to a variety of formats, including comma separated values (.csv) which can be opened using Excel. For even more customization, you can set parameters to be trended and choose that as a user defined report.
Where can I find the User Documentation?
A link to the pdf of the user documentation can be found under the File menu. If you want specific help, there are Help buttons strategically located throughout the software that will bring you to the help file.
What do I do if I think there is a problem with the software?
If you should have any questions on the operation of PROTO-FLO, first look in the documentation, or the Help file. If you cannot find the answer, contact us at (860) 446-9725, or at [email protected]. When problems with the software are encountered during its use, the user should: Determine that the problem is not a hardware or installation problem by performing the Verification Exercise. Recreate the system configuration of concern. Select "Calculate" from the Calculation tab and provide any of the printable reports at convergence you feel appropriate. Contact us or complete a Software Corrective Action Request (SCAR) in accordance with the procedure outlined on the reverse side of the SCAR form supplied by Zachry and forward the SCAR and the above information to ZACHRY NUCLEAR ENGINEERING for evaluation. We at Zachry appreciate any comments or suggestions you may have regarding our software.
on the problematic PC, it should be disabled while the following actions are performed. Additionally, the specified path (Program Files\Common Files\Aladdin Shared\HASP\haspvlib_70678.dll) should be added to the antivirus list of exceptions. First, try to reinstall the software with the antivirus software disabled. If this does not solve the problem, then: If the file does not exist, it is necessary to copy it from the distribution CD Then, it is necessary to stop the Sentinel LDK License Manager service from the Services list (Control Panel | Administrative Tools | Services), unzip the file to the location specified above, and start the service.
I am receiving one of the following errors when I try to run my model: “Operation must use an
updateable query.” “Access to path C:\Users... …\ST.PHXST” is denied.” What can I do?
There is a problem with the working database temporary file. Delete the temporary file in your Temp folder and reopen the last saved copy of your model. The temporary database file will likely be stored at a file path similar to this one: C:\Users(user folder name)\AppData\Local\Temp\ST.PHXST. This folder may be hidden. If you cannot find it, search your C drive for the file ST.PHXST and open the folder location for the result to ensure that you are deleting the temporary file and not the one stored in your Program folder. You can also opt to display hidden folders from the “View” settings in your “Folder and search options” menu. The above file name applies to the PROTO-HX Shell and Tube module. For Air Coil, Plate Frame and PROTO-FLO, the temporary file names will be AC.PHXAC, PF.PHXPF, and FloIn.accdb respectively.
Where can I find the appropriate inputs to build my heat exchanger model?
Ideally, the design basis for your heat exchanger model should come from the vendor documentation for the equipment you are modeling, taking into consideration any changes that have been made to the equipment since its manufacture, which can be applied after benchmarking to the original design performance. Design performance data used to benchmark the model, like inlet and outlet temperatures and flows, design fouling, and overall heat transfer coefficient, are frequently documented on the vendor datasheet. Physical characteristics such as the dimensions and materials, number and pitch of tubes, and air coil serpentine type, are also frequently found on the vendor datasheet but can also be found on equipment drawings. Other potential sources of information include equipment procurement specifications,
calculation reports (such as sizing calculations), walkdowns, maintenance records, and contacting the equipment vendor. Some inputs can be calculated or estimated from other available information using geometry or heat transfer equations.
How does the overall fouling factor relate to the tube-side and shell-side fouling used to build
my PROTO-HX model?
PROTO-HX treats the entered values as if they are acting on the inside and outside
surface of the tube. PROTO-HX combines the two fouling resistances into a single overall
fouling resistance by using the following equation:
Where:
Rf = overall fouling thermal resistance (hr-ft^2 -°F/Btu)
Rfi = inside surface fouling thermal resistance (hr-ft^2 -°F/Btu)
Ao = effective heat transfer area on outside surface (in^2 )
Ai = effective heat transfer area on inside surface (in^2 )
Rfo = outside surface fouling thermal resistance (hr-ft^2 -°F/Btu)
The tube-side fouling is increased by application of the outside-to-inside area ratio to
place them at an equivalent area basis before combining them. It is important to
recognize that some vendors report both fouling resistances with respect to the outside
surface. How the vendor treated these fouling resistances is only known if both a clean
and service (fouled) overall heat transfer coefficient (U) are provided. The user can
calculate the overall fouling resistance used by the vendor by back-calculating it from
the following equation:
Where:
Uservice = overall heat transfer coefficient for a heat exchanger in the “service” or
“fouled”
condition (i.e., overall fouling = design value) (Btu/hr-ft^2 -°F)
Uclean = overall heat transfer coefficient for a heat exchanger in the clean condition
(i.e., overall fouling = 0) (Btu/hr-ft^2 -°F)
The precise selection of the library configuration is not critical as long as the aforementioned criteria are used. This process only selects the starting correlation for the air-side convection heat transfer film coefficient. The benchmarking process will derive the necessary correction to this correlation to match vendor-specified performance capability.
Can I open my legacy model in the latest version of PROTO-HX?
Version 5 PROTO-HX Shell and Tube models can be opened directly in Version 6. Version 4 models can be imported to Version 6. After importing from Version 4, the user should check the configuration of the heat exchanger and compare output reports to verify the conversion. Legacy models should be rebuilt in PROTO-HX Air Coil Versions 5 and 5.10 and PROTO-HX Plate Frame Version 5.
