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ivanhow
26-08-2011, 11:54 PM
Most of us have heard of this magical box that is supposed to reduce our electricity consumption by reducing the current intake from the power mains.

I am still skeptical whether such a device actually does what it says it does by reducing energy consumption. Any idea or proof that this device actually does save energy consumption and ultimately reduces the electricity bills.

What is the theory and rational behind the savings?

kwchang
27-08-2011, 01:05 AM
This was discussed a few times in the past in the Forum -
Nov 2002 - http://www.usj.com.my/bulletin/upload/showthread.php?t=2972
Feb 2007 - http://www.usj.com.my/bulletin/upload/showthread.php?t=17188
Aug 2007 - http://www.usj.com.my/bulletin/upload/showthread.php?t=19452
Jun 2008 - http://www.usj.com.my/bulletin/upload/showthread.php?t=23117

ivanhow
27-08-2011, 02:01 AM
Thanks Chang :) . I sure cannot beat you at that speed pulling out past threads on the same topic, seriously. (This is something I wud much want to learn from you if you care to show me how. Perhaps you have special tools for doing a fast query, but this is out-of-topic.)

Went thru the threads above just now, but still I don't get sufficiently accurate answers regarding the theory and rational behind the real savings and how it comes about. Honestly, I find it hard to believe.

If those kwh meters correctly measure the true energy consumption which is the in-phase current multiplied by the voltage measured over a duration in hours, I seriously think all those gadgets are nothing more than pseudo devices that do not really introduce savings in energy consumption. The closest I cud get from the discussion is that the device intoduces a power factor correction, which I believe has no impact on the energy consumption. So far, I have not heard any TNB electrical engineers supporting the theory that these devices really do provide savings in energy consumption. If you have, I would be pleased to hear from you.

I wud luv to hear from any electical engineers who knows exactly the theory of the KWH meter installed at our homes, do they merely measure the rms current and the rms voltage to get the rms power (Powerrms=Vrms.Irms without taking the power factor into account).

If it really is a energy consumption saving device, I am ready to sell it all over the world, and the device will surely be a 'must-buy' item in every home. TNB will not be quite about it for so long...

Let me tell you an incident while listening to a sales pitch. When I asked for a demo, I literally timed the speed of the KWH disk comparing it for two different scenarios, one with the device plugged on, and the other without the device plugged on. To my surprise, the speed of the disk was much master (more revolutions) with the device plugged on although I agree that the rms current had dropped due to the power factor correction.

Please tell me more...

jimijamison
27-08-2011, 01:03 PM
Have you heard of those "Stickers" next to your ELB?

Even more debatable.

Well, in this world, there will always be those who believe. But the easiest way to save is...don't switch on anything unnecessarily. Unplug everything except the essentials such as fridge.

I tried the above and achieved more than 30% savings! Those "always on" lights (such as TV) really do consume heck of a lot. And by unplugging, there is absolutely no chance of consumption by that device.

Of course the flip side is extra effort, but I equate the savings to more milk that I can feed to my kids - so it is well worth the effort.

ivanhow
27-08-2011, 02:15 PM
Have you heard of those "Stickers" next to your ELB?

Even more debatable.

Well, in this world, there will always be those who believe. But the easiest way to save is...don't switch on anything unnecessarily. Unplug everything except the essentials such as fridge.

I tried the above and achieved more than 30% savings! Those "always on" lights (such as TV) really do consume heck of a lot. And by unplugging, there is absolutely no chance of consumption by that device.

Of course the flip side is extra effort, but I equate the savings to more milk that I can feed to my kids - so it is well worth the effort.
U mean ELCBs? what about it? Anything to do wiz pwr savings?

Ur solution to savings in energy consumption sounds great, and most ppl do that anyway. Unfortunately it's not practical to switch them on & off if you use them most of d time, using remote control. I thot I'm skeptical, but u beat me flat... :) :D :)

tupai
27-08-2011, 02:27 PM
SEMO TIPU lah...I bought, tried and still pay the same or MORE! :eek:

The best was to cut down is NOT to use aircon lah. Or to save and its proven is to switch on the aircon at night for only say 2, 3-4hrs and by midnite, auto switch-off aircon and then auto switch on the ceiling fan til morning lah ...equally cool and easy ZzzzZzz time too. :D


Yang Ada Bedding sejuk TIU xlatotupai :cool:

ivanhow
27-08-2011, 02:56 PM
Thanks Chang :) . I sure cannot beat you at that speed pulling out past threads on the same topic, seriously. (This is something I wud much want to learn from you if you care to show me how. Perhaps you have special tools for doing a fast query, but this is out-of-topic.)
...Please tell me more...
Hi Chang, (slightly off topic, but related to your post :p ) hope I am not sounding sarcastic, but I wud really appreciate if you can share with us here how you fetch those threads related to this topic so very easily, and seem so effortless. I did try using the "Search" on the menu bar, yet I am only rarely successful. Don't mind if you can share? ..Thanks! :)

ivanhow
27-08-2011, 03:07 PM
SEMO TIPU lah...I bought, tried and still pay the same or MORE! :eek:

The best was to cut down is NOT to use aircon lah. Or to save and its proven is to switch on the aircon at night for only say 2, 3-4hrs and by midnite, auto switch-off aircon and then auto switch on the ceiling fan til morning lah ...equally cool and easy ZzzzZzz time too. :D


Yang Ada Bedding sejuk TIU xlatotupai :cool:
Thanks for sharing your experience using one of those gadgets. As I suspect, it doesn't really provide any savings in real terms. Problem is that wifey seems to keep believing in those gadgets, and pester me to try it. I can't bring myself to patronise on an item that does not make sense to me.

I like your idea of using auto-switch to implement savings. Neat idea. Did you install those on-the-fly or engage a professional contractor to do d job? Can you share?

jadewhite
27-08-2011, 03:14 PM
Tips on how to save electricity http://www.youtube.com/watch?v=c7nPd0OVDGw

DarkNite
27-08-2011, 03:23 PM
There are many passive way of using less electricity, but you do have to identify which appliances is using the most and why is that so?

ivanhow
27-08-2011, 03:51 PM
Tips on how to save electricity http://www.youtube.com/watch?v=c7nPd0OVDGw
That's a great reminder to many of us on how to cut on electrical energy wastage. Thanks for the reminder, jadewhite :) Many a times, we unconciously lack the discipline on reducing wastage. Great useful tips! :) I'm sure if we do follow those tips, we wud be contributing towards a greener environment. And the least, minimum is that we shud try.

But for those of us, who lack the discipline and hope some tricks cud do the same, well this is what this thread wud be looking into - gadgets that cud do the same - is the gadget living up to it's name? :D

jimijamison
27-08-2011, 09:59 PM
Yes, many people actually switch off - but unplugging it takes it a step further. I learned this from many Americans who resorted to this measure in the last recession through Discovery Channel.

They went through the house with an Amp/Watt meter to detect every source of power consumption.

After trying it for a few days, got the hang of it. What drives me on is that I can buy an extra tin of milk powder just by unplugging and replugging. Yes, it is tough but tough times calls for tough measures and discipline.

ivanhow
30-08-2011, 01:04 AM
Yes, many people actually switch off - but unplugging it takes it a step further. I learned this from many Americans who resorted to this measure in the last recession through Discovery Channel.

They went through the house with an Amp/Watt meter to detect every source of power consumption.

After trying it for a few days, got the hang of it. What drives me on is that I can buy an extra tin of milk powder just by unplugging and replugging. Yes, it is tough but tough times calls for tough measures and discipline.
Hope u still buying extra tins of milk powder with the unplugging. If you do, can you share what are the devices that you plugging and unplugging daily? We might be missing something to the point we are foolishly throwing our money away without knowing it.

snowy_8
31-08-2011, 02:26 PM
Yes, many people actually switch off - but unplugging it takes it a step further. I learned this from many Americans who resorted to this measure in the last recession through Discovery Channel.

They went through the house with an Amp/Watt meter to detect every source of power consumption.

After trying it for a few days, got the hang of it. What drives me on is that I can buy an extra tin of milk powder just by unplugging and replugging. Yes, it is tough but tough times calls for tough measures and discipline.


Agree unplugging helps. For the last 2 years i unplug every single thing after using it...laptop, modem, nite light, electric kettle, hair dryer, stand fan etc. Notice a drop in electric bill...not much but enough for another meal of chap fan or noodles.

cutebanana
13-08-2012, 08:30 AM
Most of us have heard of this magical box that is supposed to reduce our electricity consumption by reducing the current intake from the power mains.

I am still skeptical whether such a device actually does what it says it does by reducing energy consumption. Any idea or proof that this device actually does save energy consumption and ultimately reduces the electricity bills.

What is the theory and rational behind the savings?

For me, as it is there are only two ways to reduce your electricity bill. First is to use less electricity, some examples would be: don't use heater shower, turn off the air-cond when not in room, or to size your air conditioner accordingly, or set it when you have dozed off into dreamland. The other way is again to use less electricity, but this comes with investment with equipment like gas powered shower heater, gas powered rice cooker, etc. Although this is normally done by commercial users of electricity as the rate is higher than domestic. We trade off using electricity to using gas. For air conditioner, maybe we can try those evaporative coolers, but i have no experience of this, whether the electricity consumption of these coolers is lower than traditional AC.

usj19
18-12-2015, 02:21 PM
yeah, unplugging works, at least a RM20 drop per month for my case..................

bslee
18-12-2015, 02:30 PM
My son installed a new Panasonic Inverter type 1hp air con for their bedroom many months back. He told me his monthly bill is about Rm60 plus more or less. Its used every nite or most nites. Quite a savings and reasonable amount. But then only 2 people living there and in only at nite after work. If ever my old aircon need a change, I'll buy an inverter type if it can save.

ng
19-12-2015, 09:50 AM
My son installed a new Panasonic Inverter type 1hp air con for their bedroom many months back. He told me his monthly bill is about Rm60 plus more or less. Its used every nite or most nites. Quite a savings and reasonable amount. But then only 2 people living there and in only at nite after work. If ever my old aircon need a change, I'll buy an inverter type if it can save.


I have an inverter air-cond in my living room but I don't switch on all the time.

I don't notice much savings when compared with normal air-cond.

CCY
19-12-2015, 11:29 AM
My son installed a new Panasonic Inverter type 1hp air con for their bedroom many months back. He told me his monthly bill is about Rm60 plus more or less. Its used every nite or most nites. Quite a savings and reasonable amount. But then only 2 people living there and in only at nite after work. If ever my old aircon need a change, I'll buy an inverter type if it can save.

I believe these savings is seen in a narrow operating band or condition. Seeing most of these so call user wishing to reduce the consumption but set their temperature to the lowest possible and find that there isn't any difference after paying so much more.

Where is the sweetspot for these inverter units....users running compressor with a 50% on 50% off time duty cycle ? 70% on 30% off , 80 on 20 off ...?

tan_r
19-12-2015, 12:54 PM
Have 4 units in the house. Servicing costs more than conventional types but the savings in electricity bill is substantial.

bslee
20-12-2015, 12:27 AM
In 1960's the air conditioners of the day (mostly window units) were all current guzzlers due to its design, piston type compressor and huge fan motors. The main components were bigger and heavier build compared to today. Much like comparing a 60's 1200cc engine and today's 1200cc engine, vast difference in consumption, efficiency and power rating.
Current models are very efficient due to technological advances and inverter implementation is one of them on the electrical circuitry to manage the compressor to save on consumption.
I remember measuring a 60's 1hp air con and it guzzled about 12 amps and current model about a third to half that...at rated efficiency (meaning a clean and optimized air-con , not some 1 year old never wash, never service unit which will guzzle much more kWh over a 6 hour period).