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  • Users: CARF
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  1. CARF

    Transparent pipe for high pressure application

    Dear all, I am looking for manufacturers of transparent pipes for "high pressure" applications. Typically up to max. 30 bar. Flow typically 100 kg/h. Typically 20 mm to 40 mm (millimeter) diameter for the pipes. We have a non-transparent, viscous product containing hard crystalline salts, so...
  2. CARF

    massbalance of a gas - liquid mixer

    Dear all, Does anyone has a simple (DYNAMIC) model (massbalance) of a gas - liquid mixer? So, liquid stream and gas stream as input and two-phase mix-flow as output. Help is appreciated, CARF
  3. CARF

    Model of gas liquid mixer

    Dear all, Does anyone has a (DYNAMIC) model (+ massbalance) of a gas - liquid mixer? liquid stream and gas stream as input and two-phase mix-flow as output Help is appreciated, CARF
  4. CARF

    Simulator for Forced Circulation Evaporation

    Hi, This link with a static evaporator model may help for basic understanding. Link I can sent you a report and some Simulink files to make a first start for a dynamic model. Simulink is a product from the MathWorks (see other forums). Regards, CARF
  5. CARF

    Fluid Flow Equations and Calculations

    Hi all, I made an overview of "all" equations required for simple fluid flow calcualtions in round pipes. Laminar and turbulent flow, Reynolds, etc. http://www.onlinecalc.nl/?page_id=47 There's also a FREE fluid flow calculator based on these equations. Or a direct link to a web...
  6. CARF

    Numerical solution of Darcy equation for headloss and velocity

    Dear all, Here are "all" equations, including the iterative algorithm of Colebrook-White. Link A freeware fluid flow calculator based on these equations can be downloaded on bottom of the webpage. Or a direct web application: Link Hope this helps to solve your problem, CARF
  7. CARF

    Artesis predictive maintenance system

    No I work in R&D and want to test the system, but would like to know if it is worth the effort at all ...
  8. CARF

    Artesis predictive maintenance system

    Dear all, Does anyone of you has practical experience with the systems from Artesis? The unique Artesis intelligent predictive maintenance system is suitable for most electric motor-driven equipment, as well as generators. It diagnoses a very wide range of electrical and mechanical faults...
  9. CARF

    Humidity Measurement in Hydrogen Peroxide (H2O2) Atmospheres

    Dear all, I found this sensor to measure Humidity in Hydrogen Peroxide (H2O2) Atmospheres (for sterilization purposes). The use of hydrogen peroxide (H2O2) as a sterilising agent in healthcare and production processes is extremely important to health and safety and has been growing in recent...
  10. CARF

    In-line bulk density of powders sensor

    That's a very nice hit, Dave! Thank you, CARF
  11. CARF

    Doppler type flow meter for saturated steam

    Perhaps it's better to apply an vortex flowmeter for this: http://www.controleng.com/article/CA186388.html good luck, C.
  12. CARF

    In-line bulk density of powders sensor

    Dear Dave, That's a very good question, I realised there is no such thing as in-line density of a powder. I depends on the ratio of the particles to the transport medium. The off-line measurement gives 30 kg/m3, but that also depends on the bulk stacking. If we transport the powder it may...
  13. CARF

    In-line bulk density of powders sensor

    Dear all, Does anyone of you know manufacturers of in-line measuring systems for density of powders? The powders we produce typically have a density of 30 kg/m3. We want to measure (and control) in-line density. Many thanks, CARF
  14. CARF

    vibrations with a decanter centrifuge

    Dear all, We encounter increasingly vibrations over a period of 12 hours on hour decanter centrifuge. Probably the machine gets fould because after a hot water flush (cleaning) the oscillations dissapear. Does anybody has experience with this and how to solve it? Typically we want to run much...
  15. CARF

    Condenser Level Control with Variable Speed Drive

    Dear all, We are thinking of applying a frequency inverter to a motor wich controls the liquid level in a vacuum condenser (through a centrifugal pump). Has anybody experience with VSD-drive level control in an industrial vapour condenser? Many thanks for sharing knowledge, CARF
  16. CARF

    PID loop - long residence time

    DOWNLOAD PRACTICAL PROCESS CONTROL BOOK @ http://carf.ariesplace.com/pressure_drop_calculator/download/Practical%20Process%20Control.pdf Good luck, PS. From practice I know deadtime like these (distance/velocity-lags) are very difficult to control. A by-pass line, by-passing the big tanks...
  17. CARF

    Centifugal Pump Flowrate

    THE SHUT IN TEST IS DONE WITH THE PUMP FULL OF FLUID. We will do a Waros said and let you know the results. We will install a pressure gauge at the discharge of the pump. So we will measure pump power take up and pressure at several valve settings. Best regards and thanks for helping, CARF
  18. CARF

    Centifugal Pump Flowrate

    Thanks, good idea, We MEASURED current at full load (water pumping): Current was 62 Ampere. So the power take up was SRT(3) * 380 * 62 * 0.85 = 34.7 kW So say 35 kW. Indeed we could do the same at zero load (no water, pump and motor running)only meachanical load. Will the pump survive a...
  19. CARF

    Centifugal Pump Flowrate

    Dear all, I feel my thread is being hijacked ; ). To give you all some more detail: Yes, we tried a Controlotron Ultra Sonic flowmeter. But I guess the pipe was rusted on the inside so I did not get any signal. With new pipes and well develloped flows it works well. To be more precisely: The...
  20. CARF

    Centifugal Pump Flowrate

    Dear all, Thank you very much for thinking with me. Yes the power we did through the above equation. What we will do is simple but time consuming, we will disconnect the pipe at the very end and collect the water in a buffertank. Volume increase / time will hopefully give us a good value of the...

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