最新版 SF Pressure Drop 10.x for Excel
最新版 SF Pressure Drop 7.x for Windows
SF Pressure Drop 軟體
計算管道中流動的液體和氣體的壓降（層流和湍流）
SF Pressure Drop calculates pressure drops of flowing liquids and gases in pipes (laminar and turbulent flow). It's also possible to calculate pressure changes caused by vertical difference of pipe and caused by changes of kinetic energy (dynamic pressure change).
SF Pressure Drop calculates also pressure drops in pipe elements (example: changes of direction) and in diverse fittings (valves, bellows etc.). A list of the calculable elements see site "Information".
It's possible to combine diverse elements and so you will get total pressure drop.
To calculate pressure drop you need data of pipes (rougness) and data of flow medium (density, viscosity). These data are available in several databases. An additional possibility to save your own data is the user-defined database.
Data will output in Microsoft Excel, so is a installed Excel version (version 2007 or newer) necessary.
Further features:
Database Standard Parts (EN/ISO/DIN/ASME/ANSI)
Dimensions and inner diameter of
- Circular pipes
- Rectangular pipe
- Bends
- Contractions
- Enlargements
- Tees
Database of properties of liquids and gases and property calculation (density, viscosity)
- Calculation of properties of water and steam according Industry Standard IAPWS-IF 97 (all conditions within the range 0 to 900 °C and 0 to 1000 bar are calculable)
- Properties dry and humid air and air in saturation state
- Properties of CO2 in the range 216 K to 1100 K and 0 to 8000 bar
- Properties of miscellaneous liquids and gases: Besides the properties, which are available as measured values you can estimate properties of more than 300 gases and liquids at different temperature and pressure. You can also estimate mixtures.
- Estimation of refrigerants at different temperature and pressure
- Estimation of aqueous solutions
- Estimation of heat trensfer oils
- Estimation of liquid refrigerants
- Flexible user database for liquids and gases, editable and extensible by the user
- Automatic update of gas data after each calculation
Further calculation methods
- Quick pump design
- Calculation of pressure drop dependent on rate of flow (showing and printing the characteristic curve)
- Channel calculation and design according Manning-Strickler
- Discharge calculations (constant and decreasing liquid level)
- Orifice design
- Calculation of an economic pipe-diameter at a known rate of flow
- Calculation of NPSH; the needed vapor pressure and density are available in a database
- Calculation of pipe volume and filling time of the whole project or of a part of the project
- Conversion of rate of flow to velocity and inverse at a known pipe diameter
- Conversion from normal-m3 to working-m3
- Conversion from kv value to resistance coefficient
- Conversion from Cv value to resistance coefficient
Miscellaneous
- Input and output of data: You can choose any unit you like
- Database of resistance coefficients of fittings, editable and extensible by the user
- Possibility to save and open project-files as Excel table
- PFlexible usable output as Excel table and chart
- You can select the language (English/German)
SF Pressure Drop calculates the pressure drop of the following pipe elements:
| Irreversible pressure drops (caused by friction, turbulences and flow separation) | |
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Straight pipes
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Circular pipe, rectangular pipe, circular ring, channel, corrugated pipe, other forms
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Pipe entrances
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Sharp edged entrance, rounded entrance, sharp edged entrance with angle, inward projecting pipe entrance
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Changes of section
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Sudden and gradual enlargement, sudden and gradual contraction
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Bends
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Circular bend, bend of segments, cast iron bend, rectangular bend, miter bend circular, miter bend rectangular
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Brandings of current
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Tee sharp edged, tee globular, tee rounded bottom plain, tee globular neck rounded, branch flowing asunder, branch flowing together, y-pipe straight, y-pipe bent
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Bellows
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Compensator corrugated tube, lyra-bend, u-bend
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Valves
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Globe valve, globe valve y-pattern, angle valve, gate valve, cock, swing valve
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Check valves
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Check valve globe lift, check valve y-pattern globe lift, check valve swing
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Nozzles and orifices
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Orifice ISO 5167, orifice sharp-edged, orifice round-edged, orifice thick-edged, nozzle, long radius nozzle, venturi tube |
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Perforated plates
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Perforated plate thin circular, perforated plate thin rectangular, perforated plate thick circular, perforated plate thick rectangular
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Strainers and grids
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Metal grid circular, metal grid rectangular, metal wire circular, metal wire rectangular, two-plane screen circular, two-plane screen rectangular, y-strainer, screen basket filter, conical strainer |
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Resistance coefficients
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Resistance coefficient of circular and rectangular pipes |
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Reversible pressure changes (caused by vertical differences of pipe and by changes of kinetic energy)
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Reversible pressure changes
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Vertical difference, dynamic pressure change of circular and rectangular pipes
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Requirements
Windows XP/Vista/7/8/10