On 06/15/2015 08:14 AM, Carlos E. R. wrote:
On 2015-06-15 14:03, Anton Aylward wrote:
On 06/15/2015 07:19 AM, Carlos E. R. wrote:
Maybe I'm missing something obvious... :-?
There are many good articles on the 'Net about this, but here's the simplest analogy I can think of that draws the difference between kW and kVA.
I know all that, my doubt is not with that. :-)
What I don't understand is how a power factor corrector is going to save money for a client, unless the company measures the power factor at the premises. And here in my country they don't, unless your contract is for a high enough current, or it is an industrial installation. Maybe it is different in your country?
I don't think they do domestically but they might for commercial or industrial plant. it wouldn't be difficult. However the obvious cost saving lies in the fact that power factor correction means less current is drawn for the same consumed power. Most places bull by the amount of current used, the kilowatt hours. Recall voltage is the constant.
Some authorities raise the point 'where does this power go?'. Good question. Maybe heat?
Yes. Higher current, higher losses on the entire network.
Higher current -> more cost.
IsquaredR losses still apply. In fact to get the same power, more current has to be drawn since voltage is a constant. Other think it produces some kind of electrical back-pressure on the generator.
:-????
Me too. It seems the phase shift is noticeable back up the line ...
Certainly the utility company can tell if you are running with an abnormal load factor.
Only if they place a measurement device at the entry point to your premises.
As I said, I don't see them doing that domestically. Never the less I see on my bill the assumption of a "Loss factor adjustment" of 1.0376. I presume that is "assumed" rather than measured as its the same from month to month regardless of my use of heating or air conditioning or the months when I need neither. I woold *expect* industrial consumers to have it measured.
How does this relate to us? See https://en.wikipedia.org/wiki/Switched-mode_power_supply#Power_factor for a start.
Interesting. But the issue there are harmonics, more than the power factor.
I look around the house at the appliances I have, the 'always on' such as the fridge & computer stuff are EnergyStar; even some like the vacuum cleaner and washer/dryer are too. All things with motors. That being said, harmonic distortions ar e power wasters as well. https://en.wikipedia.org/wiki/Power_factor#Distortion_power_factor Once again, the power factor means more current is being used than is needed. The difference between kVA and kW. -- A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting frowned upon? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org