Cost of boiling water in kettle vs gas hob

Grizzlebeard

Sea_Shell said:

coffeehound said:

DeletedUser said:

Norman_Castle said:

DeletedUser said:

Do it in a vacuum.

I don't fit in a vacuum.

Get a bigger vacuum!

Think Nasa have got a spacious one, though the rental fees could outway the fuel savings

I've seen that on TV I think?

An experiment dropping a bowling ball and some feathers at the same time, and they fall at the same rate!!

Mind    Blown!!!!

Can't know for certain without a second experiment.

Do Gas prices rise faster in a vacuum?

Gadfium

Grizzlebeard said:

Sea_Shell said:

coffeehound said:

DeletedUser said:

Norman_Castle said:

DeletedUser said:

Do it in a vacuum.

I don't fit in a vacuum.

Get a bigger vacuum!

Think Nasa have got a spacious one, though the rental fees could outway the fuel savings

I've seen that on TV I think?

An experiment dropping a bowling ball and some feathers at the same time, and they fall at the same rate!!

Mind    Blown!!!!

Can't know for certain without a second experiment.

Do Gas prices rise faster in a vacuum?

Apollo 15 did it first back in 1971..... :-)

https://youtu.be/oYEgdZ3iEKA

JackRaygun

Ok my take on this using today's Octopus daily rates is that it's very very slightly cheaper to use a kettle for one mug.

My 2.8kw/h kettle takes 47 secs to boil one mug, and a pan takes 210 seconds..

Kettle: 2.8kw/h @ 47 secs = 0.036kw/h which at 25.43ppu = 0.0091p (per mug)

Gas useage was worked out by using a before and after meter reading and by using the convoluted calculation to work out kw/h used.

Gas Hob: 0.163 kw/h used @ 0.0609ppu = 0.0099p (per mug).

Ok you're putting heat into the house, but two and a half minutes isn't going to make that much difference. You pays your money and takes your choice as they say but using a pan means that if you drink 10 mugs of tea a day you've wasted nearly 20 minutes of that day waiting for your pan to boil and as we all know a watched pan never boils...

QrizB

JackRaygun said:

Kettle: 2.8kw/h @ 47 secs = 0.036kw/h which at 25.43ppu = 0.0091p (per mug)
Gas Hob: 0.163 kw/h used @ 0.0609ppu = 0.0099p (per mug).

You've got too many decimals, or your results are in £ not p. The numbers should be 0.91p and 0.99p respectively.
But thanks for the experiment, we're all a tiny bit wiser!

JackRaygun

QrizB said:

JackRaygun said:

Kettle: 2.8kw/h @ 47 secs = 0.036kw/h which at 25.43ppu = 0.0091p (per mug)
Gas Hob: 0.163 kw/h used @ 0.0609ppu = 0.0099p (per mug).

You've got too many decimals, or your results are in £ not p. The numbers should be 0.91p and 0.99p respectively.
But thanks for the experiment, we're all a tiny bit wiser!

Of course, thanks - silly me!

coffeehound

JackRaygun said:

Ok my take on this using today's Octopus daily rates is that it's very very slightly cheaper to use a kettle for one mug.

My 2.8kw/h kettle takes 47 secs to boil one mug, and a pan takes 210 seconds..

Kettle: 2.8kw/h @ 47 secs = 0.036kw/h which at 25.43ppu = 0.0091p (per mug)

Your 2.8 kW figure probably relates to 230 volts supply, but most people's supply is around 240 volts and so the 3 kW rating will be nearer to the truth!  So many variables with this sort of comparison

JackRaygun

coffeehound said:

JackRaygun said:

Ok my take on this using today's Octopus daily rates is that it's very very slightly cheaper to use a kettle for one mug.

My 2.8kw/h kettle takes 47 secs to boil one mug, and a pan takes 210 seconds..

Kettle: 2.8kw/h @ 47 secs = 0.036kw/h which at 25.43ppu = 0.0091p (per mug)

Your 2.8 kW figure probably relates to 230 volts supply, but most people's supply is around 240 volts and so the 3 kW rating will be nearer to the truth!  So many variables with this sort of comparison

I measured it using one of those plug in meters on my 240v supply, it was fluctuating between 2770w and 2830w so 2800w was the mean.

coffeehound

JackRaygun said:

coffeehound said:

JackRaygun said:

Ok my take on this using today's Octopus daily rates is that it's very very slightly cheaper to use a kettle for one mug.

My 2.8kw/h kettle takes 47 secs to boil one mug, and a pan takes 210 seconds..

Kettle: 2.8kw/h @ 47 secs = 0.036kw/h which at 25.43ppu = 0.0091p (per mug)

Your 2.8 kW figure probably relates to 230 volts supply, but most people's supply is around 240 volts and so the 3 kW rating will be nearer to the truth!  So many variables with this sort of comparison

I measured it using one of those plug in meters on my 240v supply, it was fluctuating between 2770w and 2830w so 2800w was the mean.

Ah, fair enough, I stand corrected

Grizzlebeard

JackRaygun said:

coffeehound said:

JackRaygun said:

Ok my take on this using today's Octopus daily rates is that it's very very slightly cheaper to use a kettle for one mug.

My 2.8kw/h kettle takes 47 secs to boil one mug, and a pan takes 210 seconds..

Kettle: 2.8kw/h @ 47 secs = 0.036kw/h which at 25.43ppu = 0.0091p (per mug)

Your 2.8 kW figure probably relates to 230 volts supply, but most people's supply is around 240 volts and so the 3 kW rating will be nearer to the truth!  So many variables with this sort of comparison

I measured it using one of those plug in meters on my 240v supply, it was fluctuating between 2770w and 2830w so 2800w was the mean.

Mains probably is 240V. Manufacturers build peak load margins into their specs.  When the kettle is first switched on and the element is cold it will draw more amps (lower resistance) which exponentially reduces as it reaches working temperature. Hence it may draw 3.nn kW briefly dropping to 2.8kW after a few seconds.

(An electric blanket rated @ 150W on the label, once warmed up, and for energy calculations, may only draw an average of 20W.)