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KORF Software ENGINEERED WITH PASSION |
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KORF HYDRAULICSUTILITIES |
Updates Version 2.0 was a major upgrade that was released in Dec 2005. Site licence holders of version 1.x can upgrade for free provided the annual support is up to date. Version 2.1 is a minor upgrade to include user requests and fix known bugs. It is free of charge for all registered user of version 2.0. Bug List Bug report for Korf Hydraulics Version 2.1 as of October 2007. 11) Korf 2.x
incompatible with Windows Vista
10) Unit drop
down box for Product elevation does not work
9) Incorrect menu colour in Windows XP
8) Incorrect opening of file stored under different locale. Problem Some values are read incorrectly if a file is stored using one locale (say with comma as decimal place), and then opened in another (say with point as decimal place). It happens because some variant values are inadvertently stored as text, without converting to numbers first. The following entries are affected: INI FILE - Number of Iterations - Atmospheric pressure CONTROL VALVES - Cv specified - % Opening of stroke provided - K value specified ORIFICES - Beta ratio specified PUMP AND COMPRESSORS - Pump and shaft efficiencies provided MISCELLANEOUS EQUIPMENT - K and L/D value Update Fixed in Version 2.0. This was an important bug. In older versions, please contact us for assistance in transfering older files between different locales, or use the following options: Option 1: Change your locale settings (Control Panel | Regional Settings) to match that of the originator. This option is preferred. Option 2: After opening the file, do NOT run it. Edit all the entries listed above, and convert them to the new locale settings. For example, "50,0" may be displayed as "500", instead of "50.0", so you have to get the actual values from the originator. Run the simulation, store as new file and compare results carefully. 7) Wrong date stamp of main executable Problem The main Korf_13.exe file is dated 1/3/19. The actual date should be Jan 19, 03. This is caused by a typing mistake in the installation program. Update Minor issue. Problem is corrected for all copies distributed after Jul 2, 2003. 6) Wrong density correction factor for pipe area changes Problem Korf convert between velocity and pressure (according to Bernoulli) for pipe size changes over most fittings. For gas and two-phase streams, a density correction factor is applied, which is derived from the isothermal compressible flow equations. There is a mistake in how this density correction factor is calculated, which results in a small error for some systems. For liquid systems the error is zero. Update Fixed in version 2.0. 5) Two Phase Flow - Hughmark holdup wrong at high velocities/low liq fractions. Problem The Hughmark Holdup is wrong for high velocity, low liquid fraction systems. The correlation in Korf is based on the curve fits (to Hughmark's original graph) presented in Chemical Engineering, July 13, 1970. The author did not indicate that the equations misbehave at Delta values (Re^0.167 * Fr^0.125 / LiqFrac^0.25) above 125. Update Fixed in version 1.4. This was an important bug. 4) Korf Report - Wrong liquid volumetric flow rate. Problem The liquid volumetric flow rate reported in the Pipe Line Report is wrongly calculated based on the total homogeneous density. For two-phase flows it thus gives the wrong result. Update Fixed in version 1.3. 3) Runlog warning: Pipe not at equipment inlet/outlet. Problem On certain monitors the Tee and Mixer does not repeatedly draw at the correct location. Over time they move away from their connecting lines. Once they are a certain distance away, Korf will warn that the line(s) is no longer connected. The simulation still runs correctly, but the warning messages are annoying. Update The root cause for this problem is unknown. A partial fix is available in version 1.3, whereby the user can press Control T to realign all Tee's and Mixers. For earlier versions, the only option is to manually drag the Tee/Junction to cause Korf to reconnect the line. 2) Error 70 on saving report file Problem On Win2000 and with files on a network, saving the report file may generate an error. Despite the error, the report is saved correctly. Update Fixed in version 1.21. 1) Pipe Fluid Composition Dialog Problem If the Pipe Composition Dialog is access from the Menu with Equipment | Edit | Fluid Properties, the incorrect Pipe may be displayed. Usually the default equipment properties. It is easy to verify, as the Pipe Number will be "L" or similar, intead of the one required, say "L1". This does not happen every time and does not affect other dialogs. Soluton To access the Fluid Composition Dialog: - Hold down Shift and Double click on the line label. - Or Double click on the line and click on the Composition button. Update Fixed in version 1.21. | |||
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