How to save electricity?

[peapot]

Limlim, for your info all my fish die. So had to buy new batch of koi. Water pump won’t use so much electricity. I think.


Glory how much u pay one gas cylinder? I pay $34 and someone tell me now almost all around this price. Wa! Your bills quite high but that is because u cook and bake a lot but my hsehold only cook lunch for child and dinner. No baking for a long time. So believe its must be fridge and aircon. But only turn on 1 aircon leh. Ceiling fan use a lot of electricity?

[atrecord]

limlim:

atrecord:

Not sure if this is the way to present it, but the electricity bill spent on the 22W LED is less than the 18W enery-saving one, significantly in terms of percentage. However, since light as a whole, is not all that expensive, the absolute savings is not that much (e.g. if it was originally $0.50, even if you save 20%, the absolute saving is only $0.10)...

That is not correct.

22W means it consumes 22W of power.

18W means it consumes 18W of power.

And one that is rated at higher wattage definitely consume more power than one rated lower = higher electricity bills. This one.. no need to explain..

As simple as that.


Let me explain what is meant by \"energy saving\" lamp..

Traditionally, bulbs are of incandescent type. They pass electricity thru the filament until the filament is heated up so much that they glow red-hot, then almost white-hot. Thus giving out light.

If you use a 80W bulb, it may be bright enuff to illuminate a room.

Now, if you use a 20W FL, it may produce the same amount of illumination as the 80W bulb.

Now, of coz the 20W FL only uses 25% of the consumption of the 80W bulb (20/80 = 25%).

Since the objective is illumination, why waste electricity by using high wattage incandescent bulbs? (when it actually produces more heat than light)

By using FL, you achieve the same illumination with lesser energy consumption. That is why, they are termed \"energy saving\" lamp. When the objective is illumination.

So, either

a) The bulb is MUCH brighter than incandescent bulbs at same wattage, or,

b) the bulb produces the same illumination, but at much lower wattage (power consumption)

Then, they are commonly referred to as \"energy saving\" bulbs.

The wattage refers to the power consumption.. as simple as that.. don't read too much into it......


For some devices, the \"W\" rating may refer to \"output power\" and not consumption, that, is another topic for another day.. as far as most household appliances are concerned, \"W\" refers to power consumption, which can be directly used to calculated electric bill$.

Well, yes, I could be wrong about it afterall... It's been 1.5 yr since we scouted for lights so memory not so fresh anymore.

Now that you've pointed this out, maybe what i said of LED being not as bright for same wattage could be wrong...

[peapot]

Now I think about it, don’t think heater will take up so much electricity. We only switch on heater when we want to shower and turn it off after showering. In total we only turn on 30 each time x 4 pax. About 2 hours each day will use a lot of electricity?

[GLORYmum]

peapot:

Now I think about it, don't think heater will take up so much electricity. We only switch on heater when we want to shower and turn it off after showering. In total we only turn on 30 each time x 4 pax. About 2 hours each day will use a lot of electricity?

instant water heater don't use too much electricity but water tank heater is horrifying. So we usually turn on the heater 10-15 min before use and switch it off immediately after use.

I pay 34 for gas too, usually last about 24-27 days. My oven is on electricity not gas.

[atrecord]

peapot:

Now I think about it, don't think heater will take up so much electricity. We only switch on heater when we want to shower and turn it off after showering. In total we only turn on 30 each time x 4 pax. About 2 hours each day will use a lot of electricity?

It's not a lot if you look at how much it is compared to your total electricity bill. But it is probably significant if you compare it to say, your TV (or fan, or PC, etc.) if you use them for the same period of time lor...

[limlim]

peapot:

Now I think about it, don't think heater will take up so much electricity. We only switch on heater when we want to shower and turn it off after showering. In total we only turn on 30 each time x 4 pax. About 2 hours each day will use a lot of electricity?

instant heater?

Anyway.... for those who is free enuff to read..

Water specific heat capacity is 4.2

To heat 1L water up by 1degC, need 4200J

To heat by 5degC, need 21,000J or 21kJ.

Normal water flow rate is approx 6L/min. So bath 30mins = 180L.

If you use 180L of water to bath, it requires about 21 x 180 = 3600kJ to heat it by 5degC.


1kWh = 3600kJ = $0.22

So 30mins bathe maybe cost $0.22?

numbers are approx lah..

[Imami]

vinegar:

for those ppl who cook daily,do u find ur water n gas consumption r above average?We've below average electricity consumption,but extremely high consumption in water n gas,coz i cook daily.

Nope. But I cook only for 2-3 pple.

[Jennifer]

Our usage as follows:


Electricity (in kWh), national avg 623
Nov 481
Dec 420 *
Jan 352
Feb 426 *
Mar 570
Apr 466 *

Gas (kWh), national avg 89
Nov 122
Dec 104 *
Jan 81
Feb 102 *
Mar 121
Apr 104 *

Water (Cu M), national avg 16.9
Nov 21.5
Dec 17.4 *
Jan 11.9
Feb 16.2 *
Mar 20.9
Apr 17.4 *

[Nebbermind]

Jen, did u go holiday in dec?

[Jennifer]

Nebbermind:

Jen, did u go holiday in dec?

Ya, we were away for close to 2 weeks - between Nov and Dec.