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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
- 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
- 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!
- Relationship between axle torque and wheel torque | Eng-Tips
I can see a momentary 'jerk' occuring at the steering wheel (as force is applied through the drive train) that might be caused by an initial difference in axle twist, but I also see the differential almost immediately 'cancelling out' this affect
- What is plasticity index? | Eng-Tips
Can somebody tell me what this value represents? I know that it is the Liquid Limit minus the Plastic limit But can someone tell me what the significance is? How does plasticity affect, for example, compressibility, compactibility, strength, cohesiveness, etc When and why is high or low
- 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
- Mode Shapes and Mass Participation | Eng-Tips
Simply put, a mode with a larger mass participation means that the mode (usually) has a larger effect on the dynamic behavior of the structure Something I don't understand is, in analyses I've seen so far, you want to increase the number of modes examined to ensure that you capture at least 90% of mass participation
- How much does vertical load affect the lateral load capacity of piles . . .
In general, how much does vertical load (compression or tension) affect the lateral load capacity of piles? It seems like whenever I get the geotechnical engineer to run an L-PILE analysis for me, the vertical load doesn't seem to be that consequential
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