You can find more information within the userguide in AFT Impulse by pressing F1. Have a look through the user documentation to understand these in more detail. The transient model that you chose depends on what you are trying to determine.
In this case you are looking at what happens when you...
@casflow
How did you determine the length of piping to replace with alloyed steel, downstream of the orifice? Was it based on the length of damage observed in the carbon steel?
Keep the upstream length free of obstructions for 10 pipe diameters to allow the flow to fully develop and be uniform then it should be very close. The flow will be very close to even, but never exact in reality.
You will need to know the flow coefficient, Cv, from the valve manufacturer.
The flow rate [GPM] Q=Cv*sqrt((P2-P1)/SG)
Where the pressure is in psi and is the upstream and downstream pressure of the valve. SG is the specific gravity of the fluid relative to water at 60 Deg F.
Move the check valve closer to the tank. This would require you to adjust the shut off point on the pump to account for the volume of piping between the flowmeter and tank.
Sounds like you have back pressure in the tank which is what is causing back flow.
The cost of having to install a drip leg later on if if the equipment malfunctions or performance degrades is alot greater than installing it initially.
Hi NiravP,
Recently on a positive displacement gear pump I used a 5 Pipe Diameter straight length on the suction side. This was per the pump manufacturer's recommendations. That is where I would first look.
Cheers!
If you do decide to return to school for engineering I highly recommend that you find one that offers a structured intern/co-op program. This not only will allow you to gain engineering experience but also help pay for your schooling and give a practical break to the theoretical rigours of...
Assuming steady state, the profile like IRstuff mentioned will be a straight line from one end temperature to the other end temperature.
Are you assuming insulated sides, ie heat transfer only axially not radially?
What kind of tolerance are you looking for equal flows?
Effectively you will be trying to equalize the pressure in each of the branches. If you have a fixed flow you can introduce orifices to reduce flow in the higher flow branches. If it is more variable you may want to explore using a flow...
The only thing I haven't seen mentioned here is the cost of having a very long shaft rotating in the inside of the wind turbine, have you accounted for this decreased efficiency? I'm more curious than judgmental. It is an interesting concept!
Cheesr
Just to add to what ione said, you should consider radiation effects when dealing with natural convection along the outside of the duct, until you know the wall temperature. Consider radiation and natural convection in parallel after the two series resistors.
I have heard of using plastic heat exchangers for highly corroding fluids (especially oversea oil production which uses salt water as a cooling medium). The issues I am aware of for plastic are its lower thermal conductivity, requiring a higher surface area of the heat exchanger to compensate...
McMaster Carr, has hand nibblers that can cut up to 1/4" steel and their smaller sizes are rated at a maximum of 16 Gauge. But a simple technique would be for a jig saw like the others have suggested above.
