Hytran is continuously undergoing development to include the many features requested by Hytran's growing number of international users.

Hytran v3.6.2 has these New features. More »
Hytran v3.6.2 has these Improvements. More »
Download description v 3.6.2 new features (1.9 MB pdf file)

Hytran v3.5.4 has these New features. More »
Hytran v3.5.4 has these Improvements. More »

Hytran v3.4.8 has these New features. More »

Hytran v3.4.4 has these New features. More »

Hytran v3.4.2 has these New features. More »

Hytran v3.3.9 has these New features. More »

Hytran v3.1.5 - v3.2.8 has these New features. More »

Hytran v 3.6.2 New Features

1. DRES, URES,VALD, VALI : % opening vs Coefficient added to Input
2. VALI: New algorithm and Optional inclusion of the additional headloss
3. SURG: Option to allow the tank to empty
4. Pump/RUNS allows the user to input pump curve
5. Pump/STAR/CHEK and PUMP/SHUT/CHEK allow users to input pump curve
6. PUMP/STAR/VALI and PUMP/SHUT/VALI allow users to input pump curve
7. Text Boxes to label the drawing
8. View Dialog box for convenient editing of node and pipe data
9. AIRV: Back Siphon Break Option
10. Help for VISTA
11. PIPES: Drawing Parallell Curved Pipes
12. PUMP/VALI Input. Valve coefficients vs % Stem Movement as input
13. PIPES: Composite Pipes added to the Pipe Input Dialog
14. PIPES: Pipe Constraints added to Pipe Dialog box
15. EPANET import now reads alpha names in the *.inp file
16. Place EPANET Flow BC's on upstream node of the EPANET definition
17. EPANET: Where there is BC already on the Uspstream node or it is an Branch node, the pipe is split and the BC is located at split location
18. PIPES: Curved pipes available for parallel pipes in EPANET
19. Pipes++ can have the same features as EPANET
20. AIRC: MASSAL Air Chamber New algorithm to include air valve specification
21. Surg Inflow to all surge tanks
22. PIPE: Dummy Pipes now in RED colour
    

Hytran v 3.6.2 Improvements

1. Vali: The headloss through the in-line control valve have been recoded to provide more stability when the flow is reversing through the valve while it is closing
2. Pipe Selection indicator: When selecting a pipe, a rectangular box appears enclosing the selected pipe
3. DRES/VALVE Bug removed for reverse flowout of Reservoir
4. Fluid properties Hytran now requires the atmospheric pressure to be enters in bar or psi
5. EPANET conversion of MLD to m3/s corrected
6. Pump/Part/Shut/Check: Corrected bug in Pump/Part/Shut/Check which prevented th edialog box closing when this option is selected
7. STAN: Stan Pipe at an end nodes did not read the run correctly as misreads the end node type
8. SURG dialog did not record some charges to the Spill included and Tank Area options.
9. SURG Simple Branch did not stop at RL min corrected
10. Surg Orifice junction and branch can continue at RL Min
11. PIPE: Additional Pipe Ratings available from 2.5 - 64 bar
12. Min pressure envelop available
    

Hytran v3.5.4 has these new features:

1. New - Maximum Allowed Operating Head (MAOH): This option is activated when the MAOH is specified in th ePipe Input Dialog. When the MAOH value is input, the MAOH may be plotted along the Pipe profile to show if the value has been exceeded.
2. New - Head loss K term: The head loss coefficient K has been added to the List Data / Pipe Data spreadsheet and can be edited
3. New - Excel like spread sheet added to the List Data dialogs: The spreadsheet allows more flexible editing of the data contained in the cells. Rows may be deleted or inserted and cell content can be CUT, COPY and PASTED to another cell.
4. New - By-Pass added to Check Valve: This option allows a bypass to be modelled in the check valve
5. New - Altitude Valve with Surge Relief Overide Option (SRO): The atitude valve is added to the Head breaking Tank boundary condition. When the tank level reaches the shut off level, the valve closes according to the prescribed rate. There is an option to model surge over ride if the valve pressure exceeds the set point and moduilate to that pressure. The reopening of the valve can be delayed (hystersis effect).
6. New - Pressure sensitive Relief Valve: The valve opens when the pressure exceeds the set point and modulates to the set point. The valve closes when the pressure falls below the set point. The opening and closing ates are assigned by the user
7. New - Pressure sensitive Surge Relief Valve: The valve opens and remains open when the pressure drops below the lower set point to anticipate the return of the upsurge. The valve opens or reopens when the rpessure exceeds the higher set point. The opening and closing ates are assigned by the user
8. New - Surge Relief Override to PRED: SRO has been added to all pressure regulating valves in the PRED family of valves.
9. New - Surge Relief Override to VALI, VALD and DRESD / VALV: SRO option has been added to the Inline control valve VALI, downstream discharge valve VALD and the Downstream reservoir control valve DRES / VALV. With this option the user assigns valve closing rates rather than the actual time for the valves to close. If the pressure exceeds the SRO set point, the valve closure is arrested and may even reopen to alleviate transient pressures.
10. New - STAN: Constant inflow added to upstream standpipe BC
11. New - VALI and VALD reads the %valve area vs Coefficient to allow custom definition of the valve coefficients.
12. New - URES and DRES valve reads the %valve area vs Coefficient to allow custom definition of the valve coefficients.
13. New - VALI improved algorithm using the Cd coefficient and option to include additional dead loss if pipe and valve diameters not the same. Previously headloss was automatically included

Hytran v3.5.4 has these improvements:

1. Node reduced level (RL) information added to most boundary conditions
2. Minor head loss initialized for input to all pipes
3. Fixed the right hand side of the plot scale of the BC performance plots
4. Fixed the LIST DATA / Node Coordinates spreadsheet inconsistent changes to the HGL.
5. Fixed the PUMP / FAIL / ANTI pump speed not reducing to zero
6. Added maximum pressure difference between nodes.
7. TEL corrected at URES, PUMP and STAN nodes
8. Memory leaks removed from Turbine BC
9. Help for Orifice surge tank and Turbine revised
10. EPANET import bug removed for SURG
11. Max/min HGL have improved reporting and can be exported to Excel
12. Hytran Engine now produces the *.env and *.max files
13. When exiting Hytran in PLAN View it closes the window first before exiting - previously crash
14. Corrected the HGL pipe profile plots for reverse pipes, arrow flow directions and node numbers and BC placements
    

Hytran v3.4.8 has these New features:

New - Sub-atmospheric pressure indicator in pipelines during transients
New - ReRunning under Plot HGL/Re Run HGL Transient View can now have selected time windows to view the transients
New - Transients at the Plot Node Lines can be displayed for selelected times
New - Split Pipes will split pipes into selected proportion
New - Pipe Delimiting or Pipe Class heads can be plotted and compared to the maximum pressure heads
New - Export Plot files to Microsoft Excel (*.xls) format for custom plotting
New - Exporting text files to WORD or any other text editor
New - Friction Modes: Unsteady friction available to selected Hytran users

Improved - Pipes sorted into numerical order before displaying the List Data
Improved - Dummy pipes sub reaches can be either be set to 1 or 2 (default = 1)
Improved - EPANET2 importing

Hytran v3.4.4 has these New features:

New – Valve Coefficients: The traditional valve coefficents (Cv (Imperial units) and Kv (SI units)option has been added to all valve input dialog boxes.
New – PIPE CLASS Delimiiting Information: The pipe class based on the PN10, PN16, PN25, PN40 and PN64 can be plotted on the Max / Min HGL profile. The length and percentage of the each Class of pipe are tabulated in the output files.
New – PIPE Minor Head Losses: Minor head losses can now be input for pipes.
New – TANK: Head breaking tank added to list of Boundary conditions.
New – Hytran Engine to run transient analysis without graphics (approx 10-30 times faster). The results can be replayed faster than the real time graphics.
New – Panning Tool to move the drawing to more convneient position on the screen.
New – Find Tool for finding the location pipes and nodes in a drawing.

Hytran v3.4.2 has these New features:

New – ZOOM TOOL improved zoom tools
New – Split Pipes can be split pipes in any proportion
New – Sub-atmospheric pressure indicator to pipes
New – ReRunning Transient View can have selected time windows to view the transients
New – Time Window can be selected for replotting the transients at the Plot Node Lines
New – Wave action added to DRES and URES boundary conditions

Hytran v3.3.9 has these New features:

New – DrawtoScale or Schematic drawing modes. Default is DrawToScale where the pipe lengths are automatically calculated. In the Schematic mode, the pipe length is a required input.
New – Dummy Pipe can be used to connect two or more exisitng boundary conditions to create a new one.
New – Run-in Time to allow steady state conditions to settle down before a transient run.
New – AIRC: Bladder, Charlatte, and Massal type air chambers added. Can have identical chambers at on location. Also inidcator for maximum working pressure.
New – AIRV anti-shock option available in air vaves, vacuum break feature to allow sub atmospheric pressures in a pipe before valve opens.
New – CHEK operation controlled by the valve characteristic including reverse velocity and deceleration of fluid flow.
New – VALD can be instaled at a pipe junction to model leakage from a pipe.
New – Attempt Steady State to find the steady state conditions before a transient run. The Steady State conditions of discharge and HGL at ndoes can be saved.
New – HillDiagram software avaialble to process turbine Hill charts.
New – HGL Pipe Profiles can be saved and recalled. Also pipes with reverse flwo directiosn can be selected.
New – Pipe and BC selection is less sensitive and easier to select.
New – URES/DRES variable level option.
New – SPRI sprinkler boundary condition added to list.
New – PRED family of pressure reducing/ sustaining / reducing sustaining a nd flow control valves added to BC list.
New – DRAW can be used to model reinjection wells.

Hytran v3.1.5 - v3.2.8 has these New features:

NEW - EPANET2 can import both the EPANET2 (*.inp) network file and the gerenated report files (*.rpt) to obtain the steady state disharge and HGL at node points.
NEW - Looped Network can analyze transients in looped network distributions. Requires the steady state HGL at all nodes are required as input data.
NEW - Attempt Steady State can now attempt to find a steady state solution for a network using approximate HGL at nodes and pipe discharges.
NEW - AIRC: Air chamber chamber can now have a different inlet and outlet diameters between the pipe and air chamber.
NEW - STAN: stand pipe with variable area vs elevation curve is available.
NEW - TURB/RELV: Additioanl options added to this BC.
NEW - VALVES: Improved algorithm for all valves based on the stem position and discharge coefficients.
New - PUMP/FAIL/ANTI: The Anti-Surge valve at the pump discharge opens whenever the pressure falls below a preset lower pressure limit. When the pressure exceeds the lower limit, the valve then closes according to a preset time. When the pressure is above a preset upper pressure, the valve reopens to control the anticipated upsurge. The valve remains open until the pressure falls below the preset upper limit after which the valve closes according to the preset time.
New - PUMP/FAIL/VALI: This has been added as some older pump installations have air controlled valves to normally close the valve in a set time while the pump is still running at full speed as the method of pump shut down. (This is the same as PUMP/SHUT/VALI.) In the event of a power failure, however, the pump will trip and use the remaining air to close the valve.
NEW - PRVA/RELV: Improved algorithm for modelling pressure relief valves.