Hi everyone,
I'm designing a vessel of ~1m3 supported by 4 lugs to horizontal structural members (It contains water at 35°C). Due those, the shell should have a local stress concentration in each lug, with a bending moment and shear stress.
Despite the ASME code, section VIII classifies this...
Hello,
Is there any fuel cells expert to provide some rough magnitudes please about their efficiency?
What is the rate of supply of hydrogen and oxygen (eg in litres per minute) for a given fuel cell of specific size (I assume volume or area) and how much power (energy per time) that produces...
Does anyone have an indication of the exhaust gas volumetric flow rate of diesel engines?
I read in this graph:
http://www.sokken.co.jp/files/products/AirFlowmeters/modal_JE05-1.PNG
from this webpage:
http://www.sokken.co.jp/en/flow/201011/entry3.html
that for a 4L diesel engine, the maximum...
Hello! I don't know if this is the most appropriate forum.
Do you know any gas sampling system that will collect gas samples per second and store them in capsules or something to analyse them at a later stage?
I have a pipe ejecting gas and I want to analyse the gas per second, but without...
Hi. I am looking for a fastener that can replace a normal bolt and screw, but I need it to be able secure/unsecure it with your foot. Is there anything like that? Lazy operators complain about having to bolt a bar holder with 6 bolts so I am looking for something faster and convenient. Any idea...
Abaqus deflection control problem | job successful | but no bending | zero result
3 point bending test to get load deflection curve
Please help to correct the mistakes in this
supported files are...
waross: thanks for the answer, my plan is engage the mechanical brake when the drive is not in running (So when the motor speed is 0 RPM), to be sure the motor does not move with the load.
So all the AC motors can develop full torque from 0 RPM using a VFD in vector mode?
Would it work if I run the VFD in sensorless vector mode? I guess this is the same than vector control with encoder, having less accuracy for the speed, am I right?
Sorry for the dumb question... how do you know its HP/RPM ratio constant? Im not an expert for motors... I've heard there are motors which the HP/RPM ratio isn't constant
Thanks!
Hello
I have a requirement from plant, we have a crane working with a two speed motor (nameplate attached to the post) right now we control the motor with two AC contactors (low and high speed) and brake. I do not have the electrical drawings
We want to remove the AC contactor control adding a...
Thanks for your valuable suggestions. I will read the references you recommended.
I also searched a little further by my own and I found "Mechatronics with experiments" by S. Cetinkunt. Section 3.6 is titled "Actuator sizing" and it seems ok, but I haven't read it carefully, yet.
I need to review some criteria for design of electrically-driven machines, especially for proper selection of electric motors and gearboxes.
I know some of this stuff from an university course that I took some years ago, in Italy. I have some resources in italian but now I would like to study...
Thank you, but I need to make my issue more clear:
I work in a slowly (50years) growing factory where utility piping he been expanding also.
We have come to a point where there is no clear view of the situation anymore.
So we need to make some sort of diagram to make clear how the piping runs...
Hi
In an industrial plant,how is comprehensive utility piping (water, Steam, Compressed Air...) documented and identified?
Examples are welcome.
Thank you.
Hi everyone, i have to size a safety valve using API 521. Do i have to follow the standard orifice table in API 526 (D, E, F, ecc.)? I'm not sure about that because over this table the standard says: "These effective areas are valid only when used with the sizing equations in API 520, Part I"...
Hi everyone, i'll learn how to size a liquid valve according to API 520. After reading this standard i understand how to determinate the orifice size (using a preliminary Kd of 0,65), but at this point i can't understand which of my valves should i use. For example:
Table orifice size
E = 0,196...
Hello everybody
I have the famous (and very useful) "CATIA portable script center v1.6" by ferdo, but i have seen on the forum that a v2.0 exists.
Is there a way to download it? Links from thread560-298847 ...are dead.
Thanks in advance!
Cheers
