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So let's talk about the DC pumps for a minute. Say you set up a 2 outlet closed loop (times 2) using DC pumps. You could theoretically via Apex control each pump to create some sort of wave motion, and virtually control the exact flow (and therefore energy consumption) of the pump?
I've been out of the game 3 years and stuff has changed so much even since then.
That's a very broad statement that can be true is some cases and completely false in others. It just depends on the design of the pump. Without knowing what exact pumps were tested, it's hard to shoot holes in the conclusion. However, as we have found, some often do not choose the right pump for the job....without going into too much detail the company that I work for has done extensive longevity testing on DC pumps, below is a snippet of a recent release of findings.
"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."
...without going into too much detail the company that I work for has done extensive longevity testing on DC pumps, below is a snippet of a recent release of findings.
"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."
...what the information does not provide is a consensus around true lifespan percentage based on pump design, power supply , etc vs AC pumps. I've been trying to find any information related to useable lifespan of hobbyist grade DC pumps we employ, but for obvious reasons, they are keeping this sort of information on a need-to-know. That's not to say that they are doing anything wrong, as I can understand the need to keep intellectual property secure but is something to consider.
Just curious. Would you be able to explain what DC pumps are, and the different types that are commonly used in this hobby?
In regards to lifespan it varies greatly from manufacture to manufacture. In this hobby you can't generalize, you have to be more specific.
I wanted to clear something up. I am only doing a closed loop on my next system to show that it is not obsolete. In this thread I have continually criticized 143MPCo for making broad statements that are flat out wrong. When you are a highly influential member of this community and make statements like he has, you need to be able to back it up when questioned. If you can't, maybe you should question yourself as to why you are posting your statement in the first place.Back to the point of this thread, and I said it earlier, in my opinion it's been established there are still situations where a CL is appropriate. The advent of some of the newer technologies has the potential of saving the CL user a little operating money.
In fact, go back to posts #97 and #99, you'll see the poster has elected to do a CL on his new build...so the closed loop is clearly not obsolete...at least not yet.
AC pumps can be just as efficient as DC pumps.one just has to look at wattages used on a AC vs DC pump to see that you're at a much higher kilowatt an hour cost for just one pump.
What does a DC pump have to do with a DC pump. You can use a DC pump for a closed loop.Case closed. HELLO DC PUMPS, goodbye loop!
A pump does not have to be DC to be controllable.seriously, you bring up an interest point and that's the fact that the DC pumps are controllable allowing you to place the reef into, dare I say it (this is the I.T. in me speaking), "sleep-mode" and conserving even more power consumptions during the intervals it's not needed... that also has additional benefits to its inhabitants and something to be considered when looking for a pump.
So what the heck does this mean? Like 110v pumps produce more heat? Not if the wattage is the same as the DCDON'T FORGET the heat generated by powerheads.....part of the equation. Buy 110v pumps directly under a tank also heat the tank.
You can't make a statement like this because it is not always the case. In fact it can be argued that it is just false. But that depends on what your definition of a DC pump is. Problem is we can't get a definition from him to understand his position. He might just be misinformed or maybe we are?"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."
It is clear that there are no standards in this industry. Below are questions that need answering as it seems we all have different definitions. I know from experience that just because a company claims a pump is DC, does not mean it meets the
My question is how can we define a DC pump?
A DC pump uses permanently placed magnets on the rotor and utilizes an external DC power supply
How can we define a DC powerhead?
Same as above. DC needs to have a magnetic rotor and DC power source
These are comments in this thread that make it clear that the message is getting muddied!
AC pumps can be just as efficient as DC pumps.
True they can be but if you look at the nameplates you can determine efficiency from the given information.
I have yet to see in my 20 years a TRUE efficient AC pump
What does a DC pump have to do with a DC pump. You can use a DC pump for a closed loop.
Yes you can use DC in any pump configuration.
A pump does not have to be DC to be controllable.
This is also true but missing the two major differences. You have to control AC by variable frequency and DC by pulse width modulation.
So what the heck does this mean? Like 110v pumps produce more heat? Not if the wattage is the same as the DC
The wattage created is mainly by the power supply in a DC circuit. In AC the heat is created within the rotor and the stator.
You can't make a statement like this because it is not always the case. In fact it can be argued that it is just false. But that depends on what your definition of a DC pump is. Problem is we can't get a definition from him to understand his position. He might just be misinformed or maybe we are?
A DC pump is a permanent magnetic motor controlled through PWM.
An AC pump has no PWM control.
So technically they both have the same build, controlled in different manners and also is either externally powered or direct powered.
All of a sudden I hear crickets in the calm..so if that's you you want it defined, then how in the world can it be more efficient since the design inherently looses efficiency in the conversion from AC to DC. Companies like Jebao have a long history of wildly lying about their flow rates so I'm not sure their pumps should ever be taken at face value.