Hello,
I'm working on an application where I would like to mix two streams of water at different temperatures, to make one stream of water at a uniform temperature.
I don't know the exact flow rates yet but the application is for cooling a scientific instrument and the pipework will be ~1/2"...
Hello, thank you for the comments received and I apologise for the delay in responding. Supercritical helium is a compressible fluid.
To give an example I've chosen some arbritrary values. I've selected a 10mm diameter transfer line that is 50m long. Through this flows 10g/s of helium with an...
Hello everyone,
I've been asked to investigage a cryogenic transfer line that is carrying supercritical helium. This isn't my area of expertise and I'm struggling to find help, our previous Cryogenic engineer left in a hurry and I can't find anything in the literature although I'm probably...
Thank you George and Pierre, I'll follow up on your recommendations. Also on Pierre's point about using a sub-contractor, we're planning to do this later but want to do some in house exploration first so that we're a more informed customer.
Hello,
I wonder if someone could advise on a good book for heat exchanger design? I'm responsible for a system where that requires several heat exchangers. We know that these are liekly to be operating at several different but steady operating points. We're going to have to pick the best...
Hello,
I wondered if anyone could help in recommending a software package for analysing a manifold flow. This manifold has dividing and combining flows. I've previously analysed a similar system following an example given in Miller's Internal flow Systems book. Where I looked up loss...
Hello,
I'm looking at a problem on an assembly in tension. This could be assumed to be a clevis pin arrangement where several plates are joined together using a pin. The holes in the plates are clearance holes and are a slightly larger diameter hole. I'd like to calculate the contact stress...
Hi HPost,
Thanks for the reply. For the time being I'm assuming that a high level of control is needed with the minimum overshoot. So a PID controller would probably be required. What I'm not entirely clear on is exactly what needs to be controlled, is it just the mass flow through the valve or...
Hello,
Thanks for the responses. The door will be used open and close access for an industrial process and will be in a hard to access location. The door has ~1m of travel. It should take 1.5 seconds. At the moment it's been assumed to reach the constant speed after .5 seconds and to stay at a...
Hello,
Thanks for the replies. The hydraulic motor is being used to move a door. The door is mounted on a linear guide and is attached to a ball screw to convert the rotary motion to linear motion. The motion profile will be a standard trapezoidal profile, ramp from 0 at a constant acceleration...
Hello,
I've been asked to build a system that uses a hydraulic motor to drive it. I've worked out the torque and rpm required at various times throughout the drive phase of motion. I'm not sure what is required from the power pack to give the required flow and pressure to turn the motor and how...
Hello,
Thank you for the replies. Similar to your suggestions I've come across a paper that recommends that the surface should be rough in order for the two mating faces to punch through the oxide layer to make a better contact.
One of the questions I'm coming across is thermal cycling of the...
Hello,
I'm working on a project that involves bolting two aluminium bus bars together. I'm after some information about how to created the bolted joint.
Is there a recommeded surface roughness and flatness for the two mating parts? I've found a reference from Bruker that mentions a German...
Hello,
I've got an odd problem. I'm using a command snippet in workbench for some post processing of a thermal analysis.
For some reason after a while ANSYS won't let me edit the snippet, generally I can run the solution a few times and am able to edit the snippet. After a while it will no...
