Calculating power consumption
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I always view documentation with a bit of suspicion. It very well could have been correct at some point in time but, may or may not be totally accurate when the unit went into production. The simplest way to know how much electricity the unit is using is to put an amp meter (also known as an ammeter) on the line and measure it. For occasional use you can get an inexpensive one at places like radio shack or some other such electronics hobby outlet. If you are a perfectionist buy a Fluke brand meter but the price is pretty steep on those. Test the unit at different settings, if appropriate, and note the measurements. Then you can use the simple formula (as Ravi mentioned in his reply) W = volts X amps. You will be charged in Kilowatt hours so you can figure out how many watts you will use in a day at the setting you would like and determine the cost to operate the unit. :cool:
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Thanks Jimmy - I just wanted a rough estimate.
Regards, Nish
Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
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Nishant Sivakumar wrote:
We bought an Air Purifier (Holmes) yesterday
I never knew that those things actally work.
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. -Brian Kernighan
Rama Krishna Vavilala wrote:
I never knew that those things actally work.
They don't :-(
Regards, Nish
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Nish, also check out the Oreck[^] model(s). The inventor claims his is the only one that *really* works. Dunno how much of that is marketing, but Oreck has been in business for a long time and is pretty well regarded. /ravi
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Thanks Ravi - the one I bought wasn't effective at all. I'll have to return it I guess. I'll see if Oreck is available here.
Regards, Nish
Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
Currently working on C++/CLI in Action for Manning Publications. (*Sample chapter available online*) -
Nish, also check out the Oreck[^] model(s). The inventor claims his is the only one that *really* works. Dunno how much of that is marketing, but Oreck has been in business for a long time and is pretty well regarded. /ravi
My new year's resolution: 2048 x 1536 Home | Music | Articles | Freeware | Trips ravib(at)ravib(dot)com
Holy crap! That *is* expensive! Not sure if Smitha's gonna let me buy that one - and I myself don't want to spend that much on this. But they claim that their filter does not need changing. So maybe in the long run it may be cheaper.
Regards, Nish
Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
Currently working on C++/CLI in Action for Manning Publications. (*Sample chapter available online*) -
Nishant Sivakumar wrote:
Now using those bits of data, is there some formula to calculate the power consumption?
Not really. You can calculate the VA rating (voltage * current), but the actual power consumption depends on the power factor of the equipment (1.0 for a perfectly noninductive circuit, but in practice is almost always less than 1.0). However, given the figures you quoted, I'd expect the power consumption to be somewhere around 150W.
Ryan
"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
Ryan Binns wrote:
However, given the figures you quoted, I'd expect the power consumption to be somewhere around 150W.
Thanks - at that rate, I don't want to leave it on 24 hours a day anyway.
Regards, Nish
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AIR CLEANERS: EVEN THE MOST EFFECTIVE COULD BE A QUESTIONABLE INVESTMENT I recommend you to read the following article in consumer reporst: http://www.consumerreports.org/cro/cu-press-room/pressroom/eng0510air.htm?resultPageIndex=1&resultIndex=7&searchTerm=oreck[^]
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. -Brian Kernighan
Thanks Rama. I am going to return this - it was a waste of time :-(
Regards, Nish
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Currently working on C++/CLI in Action for Manning Publications. (*Sample chapter available online*) -
Christian Graus wrote:
Pollution getting to you ?
No - I wanted to get rid of cooking odors.
Regards, Nish
Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
Currently working on C++/CLI in Action for Manning Publications. (*Sample chapter available online*)Use the range hood. And open a window. Or just open a window. Or just cook things that smell nice...
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Nishant Sivakumar wrote:
Now using those bits of data, is there some formula to calculate the power consumption?
Not really. You can calculate the VA rating (voltage * current), but the actual power consumption depends on the power factor of the equipment (1.0 for a perfectly noninductive circuit, but in practice is almost always less than 1.0). However, given the figures you quoted, I'd expect the power consumption to be somewhere around 150W.
Ryan
"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
You could go out and look at your meter, leave the thing on for a whole day and write down what you used, then turn it off for a whole day and compare the usage. The effeciency of your line and other factors may make it use more power than the actual rating. If you average your 'normal' usage over 24 hours, you may be able to get a good estimate of the difference in cost - I suspect it's the cost difference you want to know, not the power usage. If it costs you 100 bucks a month to run, it may not be worth it, but if it only costs you 2 dollars to run it all month, then it's probably worth it. Depending on the brand, some of the air purifiers actually are pretty good, but something often overlooked is that homes with a central air conditioner and heater already have a method of filtering the air. It won't make it smell like ozone in your house, but changing your furnace filter can help a lot with the general air pollution. For emergent conditions like cooking odors, you need to address that problem while the situation is happening, like with a good stove hood that empties to the outside air. Air purifiers aren't designed for that.
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Ravi Bhavnani wrote:
Power = Volts x Amps (132W)
That would be for DC. For AC you have to integrate the absolute value of the voltage times the current over a full sinusoidal cycle. If I remember right, that gives you a factor of 0.707 of the DC value.
The evolution of the human genome is too important to be left to chance.
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Ravi Bhavnani wrote:
Power = Volts x Amps (132W)
That would be for DC. For AC you have to integrate the absolute value of the voltage times the current over a full sinusoidal cycle. If I remember right, that gives you a factor of 0.707 of the DC value.
The evolution of the human genome is too important to be left to chance.
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Holy crap! That *is* expensive! Not sure if Smitha's gonna let me buy that one - and I myself don't want to spend that much on this. But they claim that their filter does not need changing. So maybe in the long run it may be cheaper.
Regards, Nish
Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
Currently working on C++/CLI in Action for Manning Publications. (*Sample chapter available online*) -
Rama Krishna Vavilala wrote:
I never knew that those things actally work.
They don't :-(
Regards, Nish
Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
Currently working on C++/CLI in Action for Manning Publications. (*Sample chapter available online*)They cycle the air through a small filter which makes them ok for dust. But stuff that smells can get stuck to the walls via humidity so its not going to be filtered at all.
Todd Smith
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Use the range hood. And open a window. Or just open a window. Or just cook things that smell nice...
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Ravi Bhavnani wrote:
Power = Volts x Amps (132W)
That would be for DC. For AC you have to integrate the absolute value of the voltage times the current over a full sinusoidal cycle. If I remember right, that gives you a factor of 0.707 of the DC value.
The evolution of the human genome is too important to be left to chance.
<geek mode>Assuming the power supply is a clean sinusoid with no excessive harmonics.</geek mode>
Anna :rose: Linting the day away :cool: Anna's Place | Tears and Laughter "If mushy peas are the food of the devil, the stotty cake is the frisbee of God"
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<geek mode>Assuming the power supply is a clean sinusoid with no excessive harmonics.</geek mode>
Anna :rose: Linting the day away :cool: Anna's Place | Tears and Laughter "If mushy peas are the food of the devil, the stotty cake is the frisbee of God"
:) I'll even add: also assuming the phase is set properly
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Ravi Bhavnani wrote:
Power = Volts x Amps (132W)
That would be for DC. For AC you have to integrate the absolute value of the voltage times the current over a full sinusoidal cycle. If I remember right, that gives you a factor of 0.707 of the DC value.
The evolution of the human genome is too important to be left to chance.
These are RMS figures so it's still P=V*I.
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Ravi Bhavnani wrote:
Power = Volts x Amps (132W)
That would be for DC. For AC you have to integrate the absolute value of the voltage times the current over a full sinusoidal cycle. If I remember right, that gives you a factor of 0.707 of the DC value.
The evolution of the human genome is too important to be left to chance.
As Elaine says, the quoted AC line voltage is the RMS value. UK 240Vrms AC peaks at nearly 340V.
Stability. What an interesting concept. -- Chris Maunder
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Use the range hood. And open a window. Or just open a window. Or just cook things that smell nice...
Shog9 wrote:
Use the range hood. And open a window. Or just open a window.
The kitchen doesn't have a window - the nearest window is the one in the living room - which we keep open. But it still takes a while for the odors to vanish.
Shog9 wrote:
Or just cook things that smell nice...
We are Indian, remember? :-)
Regards, Nish
Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
Currently working on C++/CLI in Action for Manning Publications. (*Sample chapter available online*) -
They cycle the air through a small filter which makes them ok for dust. But stuff that smells can get stuck to the walls via humidity so its not going to be filtered at all.
Todd Smith
Todd Smith wrote:
They cycle the air through a small filter which makes them ok for dust. But stuff that smells can get stuck to the walls via humidity so its not going to be filtered at all.
Yeah, these things seem to be meant for visible dust particles and not for odor.
Regards, Nish
Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
Currently working on C++/CLI in Action for Manning Publications. (*Sample chapter available online*)