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Please click on the questions below for our responses.

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.

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). error message 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.

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.
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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.

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 zne‑ When problems with the software are encountered during its use, the user should: We at Zachry appreciate any comments or suggestions you may have regarding our software.

Install the 32-bit AccessDatabaseEngine available free from Microsoft

Install the 32-bit AccessDatabaseEngine available free from Microsoft

If your license is on a license server, you do not need to trade files.

Run the HASPUsersSetup.exe on the new computer and then the Proto-Flo (or Proto-HX) Workstation Setup.

If you can see the features from the license server http://localhost:1947/_int_/features.html you are all set.

If you do not see features, you need to add the server to the Search Parameters on http://localhost:1947/_int_/config_to.html

Right Click on the Setup.exe file in the File Explorer and choose “Run as administrator”.
If you still get an error, then check your firewall.

Important note: the error might have different text preceding error code 48. It might be "hasp_no_vlib", "hasp_update" or something else. The solution remains the same regardless of this text.

One of the files that are essential for the licensing service functioning is absent. It is necessary to restart the computer and check whether the following file exists:

Program Files>\Common Files\Aladdin Shared\HASP\haspvlib_70678.dll

One of the main causes of this error is oversensitive antivirus software. If there is such 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.

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.

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.

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:


Rf = overall fouling thermal resistance (hr-ft2-°F/Btu)
Rfi = inside surface fouling thermal resistance (hr-ft2-°F/Btu)
Ao = effective heat transfer area on outside surface (in2)
Ai = effective heat transfer area on inside surface (in2)
Rfo = outside surface fouling thermal resistance (hr-ft2-°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:


Uservice = overall heat transfer coefficient for a heat exchanger in the “service” or “fouled”
condition (i.e., overall fouling = design value) (Btu/hr-ft2-°F)
Uclean = overall heat transfer coefficient for a heat exchanger in the clean condition
(i.e., overall fouling = 0) (Btu/hr-ft2-°F)

The Petukhov-Kirillov correlation is used by default in the turbulent flow regime (Reynolds Number greater than 10,000) due to its reported accuracy. When Petukhov-Kirillov is selected, the Churchill correlation will be used when the tube side conditions are less than a Reynolds Number of 10,000. The Sieder-Tate correlation remains an option to allow analysis consistency with previous versions of the code and is used for all flow regimes if selected. The higher uncertainty inherent in the Sieder-Tate is only a factor in the uncertainty analysis that accompanies the analysis of thermal performance test data. Tube-side Prandtl Numbers must fall within the following limits:

The library of coils represents the population of coil configurations that have undergone extensive testing to derive the air-side film convection heat transfer coefficient relationship with Reynolds number. Since very few coils in service today truly reflect the exact geometries in the PROTO-HX Air Coil Module configuration library, the user is left to select a configuration from the library that best matches the subject coil (the coil that is being modeled). The user documentation contains a table of the parameters associated with each library configuration. The following guidelines are offered for this selection process: 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.

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.

For more information on our PROTO-Series, please contact Analysis Division Support by email at The Analysis Division contact list is here.