[Stoves] Heat Content of Ethanol Gel

[Crispin Pemberton-Pigott]

Dear Philip

Have you added in the heat needed to raise the water content of the ethanol
from 20 to 100 C before boiling it? I didn't see that in the sheet.

I do not quite follow the heat related to the water formed during
combustion.  I would have expected that to be steam when it is formed and no
heat would be absorbed (Cell H22) by that.

I set the ethanol content to 100% and H2O is still is absorbing heat even
though it is a combustion product.

This is my simple understanding:

1	Heat is required to heat the ethanol from 20 to its boiling point,
value unknown
2	Heat is required to heat the water from 20 to 100 C
3	Heat is required to boil the ethanol
4	Heat is required to boil the water

5	The ethanol is burned yielding heat and gases and vapours including
water vapour (HHV?)
6	The vapours are not condensed usefully on the pot so a stove only
gets the LHV

The net heat available is 5 - (1+2+3+4)

I understand that the value of 5 is 31.8 KJ/Kg and that the HHV is about
29.7 though quite why is not clear and numbers vary on different web sites.

I take it that HHV = GCV and LHV = NCV.

How close is this understanding?

Thanks
Crispin