Thank a lot.I like this test laboratory I hope to make more and more for other demonstration like this , such as selecting motor with load , measuring tourq power of motor...etc . Thank a lot again.
I see that pressure wasn't mentioned, but it was sometimes visible (fluctuating) in the video. Full speed, valve fully open: 39 GPM , (~8 psi), 364 W Full speed, valve partly closed: 25 GPM, (~8 psi), 298 W Slow speed, valve fully open: 25.7 GPM, (~3.5 psi), 144 W
Sir you just down the frequency and down the speed and save the running cost of motor is so good because motor speed will decrease and draw the power become decrease but tank hight will increase the pressure is become not enough ....ohh....super sir I just clearly identified this.......
Pressure wasn't mentioned. You cannot slow the motor down that much in real world scenarios because there is always some lift to overcome. VFDs cannot save you money if it always takes 70% of the motor power to just get the water out of a 100ft deep well. The motor can never be slowed down less than 70% to get flow with no pressure. To get decent pressure (50psi) it can't be slowed much, no $ saved! I'm not even adding in the cost of all the electronics, installation, and maintenance. Maybe show your energy savings on a real world application instead of in a demonstration tank. VFDs have their uses but they do not save money.
VFD's are more specifically used for process control in industry. I haven't seen any application so far which strictly mention energy saving in the designing. Money saving is an attractive norm used by VFD manufacturers to attract customers. Of course in Lab demonstration it was very tempting but on industrial scale it's not proven yet.
Wow - terrible video with only a minor mention of affinity laws. Re-title the video "How VFD's can save you money" or better yet, "Poorly scripted skit delivered by unintelligible actor"
Why do companies produce stupid videos like this. Just take off the stupid safety glasses and lab coats and tell us the facts. This is so bad. It would be so much better if you just explained the affinity law like we are adults.
Thank a lot.I like this test laboratory I hope to make more and more for other demonstration like this , such as selecting motor with load , measuring tourq power of motor...etc . Thank a lot again.
I see that pressure wasn't mentioned, but it was sometimes visible (fluctuating) in the video.
Full speed, valve fully open: 39 GPM , (~8 psi), 364 W
Full speed, valve partly closed: 25 GPM, (~8 psi), 298 W
Slow speed, valve fully open: 25.7 GPM, (~3.5 psi), 144 W
This was described by head being proportional to the square to motor RPM, but likely not emphasized as mush as it should have
Entertaining video and a nice description of how VFD's can save you money.
Sir you just down the frequency and down the speed and save the running cost of motor is so good because motor speed will decrease and draw the power become decrease but tank hight will increase the pressure is become not enough ....ohh....super sir I just clearly identified this.......
great stuff
Excellent
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Pressure wasn't mentioned. You cannot slow the motor down that much in real world scenarios because there is always some lift to overcome. VFDs cannot save you money if it always takes 70% of the motor power to just get the water out of a 100ft deep well. The motor can never be slowed down less than 70% to get flow with no pressure. To get decent pressure (50psi) it can't be slowed much, no $ saved! I'm not even adding in the cost of all the electronics, installation, and maintenance. Maybe show your energy savings on a real world application instead of in a demonstration tank. VFDs have their uses but they do not save money.
VFD's are more specifically used for process control in industry. I haven't seen any application so far which strictly mention energy saving in the designing. Money saving is an attractive norm used by VFD manufacturers to attract customers. Of course in Lab demonstration it was very tempting but on industrial scale it's not proven yet.
Wow - terrible video with only a minor mention of affinity laws. Re-title the video "How VFD's can save you money" or better yet, "Poorly scripted skit delivered by unintelligible actor"
Why do companies produce stupid videos like this. Just take off the stupid safety glasses and lab coats and tell us the facts. This is so bad. It would be so much better if you just explained the affinity law like we are adults.