Because if you leave out the companies that pull flow numbers out of their tail, then reality sets in.All of a sudden I hear crickets in the calm..
Where did Jabao come from and why the company bashing?
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Because if you leave out the companies that pull flow numbers out of their tail, then reality sets in.All of a sudden I hear crickets in the calm..
Where did Jabao come from and why the company bashing?
Consumption means nothing if the flow is not as stated.Do I have to break out my "kill a watt" to prove consumption ?
Also ac to dc power supplies are solid state and has minimal loss in the conversion.
It only took 100 posts to start questioning ac and dc when this was already battled in the late 1800's
But we are talking efficiency in this thread regardless of flowConsumption means nothing if the flow is not as stated.
Efficiency or current draw. IMO they are completely different. To calculate efficiency without the known flow seems just a little shady IMO.But we are talking efficiency in this thread regardless of flow
Had one for over 10 years. Being from California, it is a must to know where you electricity is going. Most reefers around have ditched this method as it can also be monitored with their Apex.
Most people don't run an apex so this is a vital tool to know where your kwh's are spent.Efficiency or current draw. IMO they are completely different. To calculate efficiency without the known flow seems just a little shady IMO.
Had one for over 10 years. Being from California, it is a must to know where you electricity is going. Most reefers around have ditched this method as it can also be monitored with their Apex.
Please explain this. I want to make sure I understand where you are going with this. IMO, you are starting to flirt with the laws of thermodynamicsHeating
Inductive heating is the biggest energy waster. AC coil or carbons.
An ac coil will produce more heat than a PWM dc coil.
Isn't thermal dynamics part of energy loss?Please explain this. I want to make sure I understand where you are going with this. IMO, you are starting to flirt with the laws of thermodynamics
BTW, we are totally off topic now as this has nothing to do with closed loops. The only reason DC pump questioning was that the OP failed to differentiate the form of DC pumps he was talking about.
As for the Apex, I meant to say around here the Apex is commonplace.
Please explain this.
Hopefully 143MPCo understands this clarification. As I said earlier, I had a problem with this statement."DC pumps also tend to be more efficient. However, AC pumps usually are designed for higher speeds and larger bursts of power. They also have a longer working lifespan than DC pumps."
Now lets talk longevity
Most ALL aquarium pumps or powerheads use a ceramic shaft with ceramic bushings.
Lets not compare apples to oranges here.
Lets start with internal pumps and powerheads
No matter the currents applied (ac or dc) we will see failure
This is simply due the methods employed at stabilizing the rotor.
Its called wear
The laws of thermodynamics dictate that all of the energy going into the motor is all converted to heat."DC pumps also tend to be more efficient. However, AC pumps usually are designed for higher speeds and larger bursts of power. They also have a longer working lifespan than DC pumps."
Hey Greg not here to argue.The laws of thermodynamics dictate that all of the energy going into the motor is all converted to heat.
Maybe, Maybe not.But still DC will rule one day when it comes to pumps and efficiently pumping or moving water.
But we are talking efficiency in this thread regardless of flow
Most people don't run an apex so this is a vital tool to know where your kwh's are spent.
And the biggest consumer of any tank...
Heating
Inductive heating is the biggest energy waster. AC coil or carbons.
An ac coil will produce more heat than a PWM dc coil.
Now lets talk longevity
Most ALL aquarium pumps or powerheads use a ceramic shaft with ceramic bushings.
Lets not compare apples to oranges here.
Lets start with internal pumps and powerheads
No matter the currents applied (ac or dc) we will see failure
This is simply due the methods employed at stabilizing the rotor.
Its called wear
Now if we were to compare this to an ac driven external pump that employs bearings it will run till the tank comes down. But at what cost due to PE?
So who is your winner? Thomas Edison or nikola Tesla?
Hey Greg not here to argue.
We all have valid points.
But still DC will rule one day when it comes to pumps and efficiently pumping or moving water.
We are discussing a low/minimal head application here are we not? Sounds like the stuff you are referring to are high head applications.Other articles have used the Affinity Law to show energy is being saved by the cube of the RPM. However, they neglect to mention that head is lost by the square of the RPM. This limits the minimum RPM possible that will still produce the head required. These articles falsely show incredible reductions in power that go along with reducing the RPM by 50% or more. When in reality the RPM can be reduced by no more than 10% or the head required is no longer attainable. According to the Affinity Law a 10% reduction in RPM produces only a 23% reduction in power consumed, not the 50% or 90% reduction in power that many drive manufacturers would like for you to believe. Only those who lack understanding of how centrifugal pumps really work would claim VFD's save energy.