British Gas talking silly when I wanted to reduce my DD

Ultrasonic

Mstty said:

Ultrasonic said:

Mstty said:

Norman_Castle said:

Mstty said:

I reckon you can do better watch some programs through the Ipad instead of the TV. That's got to be 100w versus 10w??? Ish lol

My 8? year old, 32" tv uses 28w.

Still 5 hours 110w saving each day you just watch through your iPad.

I'm not quite sure what calculation you were doing there but for clarity I'll mention that you're mixing up power and energy. A TV using 28 W of POWER (rate of energy use) run for 5 hours would use a total of 5 hours x 28 W = 140 Wh or ENERGY. Or 140 Wh / 1000 = 0.14 kWh to put it in the units that energy tariffs deal with.

Was just having a play around with the OP as he has such low usage was seeing if he could do even less lol 

What you failed to take off was the estimated energy usage for an iPad  for 5 hours (taking an average use) off the 140 (I probably didn't make that clear) 

My main point was about energy vs power, but I couldn't see how factoring in the 10 W iPad usage gave your number either which is why I focused on the bit I was certain of.

28 W - 10 W is 18 W, which over 5 hours would be 90 Wh saved rather than the figure of 110 you mentioned. I may be missing something simple though.

k_man

@mssty

The misunderstanding is coming from your use of the following (and similar)

6w per hour

Which is a meaningless use of units.

An similar incorrect usage would be

6 mph per hour

Mstty

k_man said:

@mssty

The misunderstanding is coming from your use of the following (and similar)

6w per hour

Which is a meaningless use of units.

An similar incorrect usage would be

6 mph per hour

I may not be able to express things in the correct terms so if something uses 30 Watts of power over 5 hours please tell me how to express this correctly on this board as to not have multiple people tag me?

Should it be 0.03 kWh of use over 5 hours.

I genuinely do not know how to express this as to not receive backlash.

Ultrasonic

Mstty said:

k_man said:

@mssty

The misunderstanding is coming from your use of the following (and similar)

6w per hour

Which is a meaningless use of units.

An similar incorrect usage would be

6 mph per hour

I may not be able to express things in the correct terms so if something uses 30 Watts of power over 5 hours please tell me how to express this correctly on this board as to not have multiple people tag me?

Should it be 0.03 kWh of use over 5 hours.

I genuinely do not know how to express this as to not receive backlash.

If something uses 30 W of power when running, and it's on continuously for 5 hours, then the total energy used is 30 W x 5 hours = 150 Wh. To convert from Wh to kWh your divide by 1000, giving you 0.15 kWh.

Section62

Mstty said:

Ultrasonic said:

Mstty said:

Ultrasonic said:

I'm not quite sure what calculation you were doing there but for clarity I'll mention that you're mixing up power and energy. A TV using 28 W of POWER

I have already explained it's actually 6w per hour to run an old 2015 iPad pro so 28w - 6w

The point Ultrasonic is making is an important one.  People commonly confuse watts and kWh and this is one of the reasons why they have problems understanding how much it costs to run appliances, or how their bills are calculated.  This site is designed to help people understand by sharing information - that only works properly if the information being shared is correct, and not in itself confusing.

"6w per hour" is incorrect and confusing.  It sounds a bit like "6 kWh", but in reality is something very different.

Ultrasonic

Mstty said:

Section62 said:

Mstty said:

Ultrasonic said:

Mstty said:

Ultrasonic said:

I'm not quite sure what calculation you were doing there but for clarity I'll mention that you're mixing up power and energy. A TV using 28 W of POWER

I have already explained it's actually 6w per hour to run an old 2015 iPad pro so 28w - 6w

The point Ultrasonic is making is an important one.  People commonly confuse watts and kWh and this is one of the reasons why they have problems understanding how much it costs to run appliances, or how their bills are calculated.  This site is designed to help people understand by sharing information - that only works properly if the information being shared is correct, and not in itself confusing.

"6w per hour" is incorrect and confusing.  It sounds a bit like "6 kWh", but in reality is something very different.

Indeed I am learning today

So if an appliance plugged into the socket for exactly one hour with a plug rated at 10w (iPad charger) but shows 6w usage on a meter for that hour to keep it topped up to 100% when used.

What is the definition to be used 0.006 kWh usage.

If not please let me know

The distinction worth making is that you've used the word 'usage' for two different things there: power in the first case and energy in the second. You are right that a device using 6 W of power for 1 hour will use a total of 0.006 kWh of energy.

Mstty

@wrf12345

So to clarify

Your TV uses 0.028 kWh where as your iPad could use as little as 0.006 kWh plug in topping up to 100% (based on our 2015 iPad Pro)

Apologies for any confusion caused on your post was just trying to convey an extra saving you may want to use that we have also started to do👍

Quote "By seeking and blundering we learn"

RogerBareford

Mstty said:

@wrf12345

So to clarify

Your TV uses 0.028 kWh where as your iPad could use as little as 0.006 kWh plug in topping up to 100% (based on our 2015 iPad Pro)

Apologies for any confusion caused on your post was just trying to convey an extra saving you may want to use that we have also started to do👍

Quote "By seeking and blundering we learn"

If you quote total energy usage like you have in this post you also need to say how long they are running for to give the context.

What you have said there is like saying "My car uses 10 litres of fuel and your car uses 5 litres of fuel" which isn't very useful because we have no idea how far the car's have driven to use that much fuel.

So that statement would be improved by saying:

"Your TV uses 28w where as your iPad could use as little as 6w plug in topping up to 100% (based on our 2015 iPad Pro)"

Mstty

RogerBareford said:

Mstty said:

@wrf12345

So to clarify

Your TV uses 0.028 kWh where as your iPad could use as little as 0.006 kWh plug in topping up to 100% (based on our 2015 iPad Pro)

Apologies for any confusion caused on your post was just trying to convey an extra saving you may want to use that we have also started to do👍

Quote "By seeking and blundering we learn"

If you quote total energy usage like you have in this post you also need to say how long they are running for to give the context.

What you have said there is like saying "My car uses 10 litres of fuel and your car uses 5 litres of fuel" which isn't very useful because we have no idea how far the car's have driven to use that much fuel.

So that statement would be improved by saying:

"Your TV uses 28w where as your iPad could use as little as 6w plug in topping up to 100% (based on our 2015 iPad Pro)"

But I used that earlier stating watts but got pulled up

I think I shall never win this one, back to my corner I go lol

Not to worry off to work for me takes me a minute to move to the office shed lol👍

Gerry1

It's really, really simple.  Watts are not time dependent: a 100W bulb is a 100W bulb whether you look at it for a second, an hour or a week.  100W is how much power it uses at any moment.  Power is a bit like speed or the pressure of water coming out of a hosepipe.

If you use that bulb for one hour then it uses 100 watt hours of energy; 100Wh or 0.1kWh.  Energy is a bit like distance travelled or bucketfuls of water.

But saying '6W per hour' is as meaningless as saying you live '30 miles per hour' from your office or that the police prosecuted you for 'driving 40 miles' in a built up area.