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- Effect of Molecular Weight On Compressor Performance
Dear All, I have extensively studying the analysis of the impact of Molecular weight changes on fixed speed and variable speed compressors Can you provide your feedback on the below simplified summary: 1) Fixed Speed Compressor, fixed compression ratio, speed and head at every flow: a) With
- Torque spec changes from nut to bolt head? | Eng-Tips
In a torque spec for a typical bolt, washer and nut arrangement, is the proper torque value affected whether it is applied to the bolt head as opposed to the nut? Thanks!
- NPSH vs. Pressure | Eng-Tips
Hi all, I am having trouble trying to distinguish the difference between NPSH and pressure I know that NPSHr is what you must have in order for the pump to not cavitate It is equal to: (static height) + (pressure within vessel) - (vapor pressure) - (pipe friction losses) For example
- Please help clarify datum shift vs bonus tolerance | Eng-Tips
Then the datum shift is the difference between the actual size and the virtual condition size developed by the refinement tolerance If the same hole was a tertiary, the the shift is the difference between the actual size and the virtual condition size developed through the positional tolerance rather than the refinement
- Design Temperaturevs Operating Temperature | Eng-Tips
The challenge is that this difference on temperature (design and operating)trends to decrease over the time Which experience do you have on this matter? As per codes, Standards and engineering good practices, What is the difference between operating and design temperature to guarantee the integrity of the vessel is not compromised?
- Internal wind pressure | Eng-Tips
So when you get a net difference between a set internal pressure and a different exterior pressure, you get a net pressure applied to the walls of the box This is not necessarily the full internal pressure effect used in ASCE 7
- VFD and induction motor power factor | Eng-Tips
The difference can depend on the line voltage vs the VFD output voltage If you set the VFD to 460V motor it will output 460V even with a different line voltage (within limits of course) The change in voltage could affect the output current I've seen this mostly be a factor when the motor voltage setting is set too high
- Heating from the sun. | Eng-Tips
Hey guys don't forget the shaded side will be heated by primarily conduction from the sun metal plate side exposed to the sun There will be a small amount of radiation heat transfer on the shaded side but for simplicity disregard that effect Also the OP has said nothing about the ambient temperature which will affect the plate temperature
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