On 29/08/2022 14:16, Peter Merchant via dorset wrote:
I will now try and investigate why my gas boiler keeps on firing up
when it kicks in, even though I have used solar to heat my tank. It
has been suggested that the solar heats the top part of the tank via
the immersion heater, and the gas he
using those figures and the cost of electricity from my latest bill (27.10
p/Kwh ) using the kettle costs 1.49p which isn't a lot more than using the hob
(1.125 p).
It's not really a game changer, so thanks everyone for contributing.
I will now try and investigate why my gas boiler keeps on fi
So I just boiled my kettle (500ml, fresh from tap). Mains here = 242
volts, Kettle takes 12.3 A (pretty much constant) Power taken = 0.055kWh
(so pretty close to my calculation!) I allowed the kettle to trip using
the steam generated by the then boiling water (so addressing both the
loss and la
My 1965 'Basic Tables in Electrical Engineering' gives the Heat of Vaporization
of Water as 972 Btu/Lb so there is quite a bit of conversion required!
P.
On 29/08/2022 12:28, Peter Merchant via dorset wrote:
I had considered that, but it's so long ago in my ancient past that I studied
thermo
I had considered that, but it's so long ago in my ancient past that I studied
thermodynamics, I didn't look into calculating it. My concern about it is the
cost of raising the temperature to 100 deg, then the latent heat of
vaporisation to actually boil it.
Peter M. [ Applies to any form of
500ml of water = 500g water. let's assume you want to go from 20-100 C
=> increase of 80C
Specific heat capacity of water = 4.184 J/g-K
=> 167,360 J = 0.0465 kWh Electricity @27p/kWh = 1.2552p
So rather similar (OK, I don't know efficiency of electric kettle
... but heating elements are 10
Terry, I only received one message, as you can see timestamped 9:51
I did wonder if a smart meter could give you a reading on that, but acknowledge
that electricity usage is continuously fluctuating, so unlikely.
I might have to borrow my neighbour's in-line device and test the kettle/
microwa
On 29/08/2022 09:33, Peter Merchant wrote:
I was curious, so I took the water from the kettle and put it in a pot
on the stove. It was very close to 500ml.
Watching the gas meter while it boiled it used 0.014 m(cubed) of gas,
which converted to 0.15788Kwh and at my current rate of 7.123p/Kwh
I heard this discussed on the radio recently. Using the kettle to boil
water is faster, but using gas is much cheaper.
Electricity, even before the current hikes, usually worked out more
expensive for a given amount of energy than other sources like gas, oil,
solid fuel etc. LPG like Calor is the
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