[Stoves] Insulated pots -- retained heat cooking

[Richard Stanley]

Agh but, now for the politics of the process...
   Who benefits from making their own fire :  Who benefits from  
making and distributing electricity ?
Richard Stanley
=======================
On Jan 17, 2007, at 08:27, Crispin Pemberton-Pigott wrote:

> Dear Edward
>
>> It would seem a crock pot of such design
>> with embedded electrical element could
>> with potentially surprisingly low energy
>> rate of usage achieve boiling points and
>> automatically switch on or off as desired
>> and maintain temperatures as desired for
>> prolonged cooking effect.
>
> Well that is a very good description of an efficient cooker.  An  
> electric
> kettle, a coal stove for space heating and an electric frying pan  
> with a
> cover on are all really efficient.  Water heaters are very good.
>
> Something that is worth considering is how the electricity is  
> produced.  If
> the efficiency of the power generation is 35% from coal, the  
> transmission
> efficiency is 75%, and the distribution efficiency 90%, you can see  
> that the
> nest improvement is to use local heat sources for heat applications  
> - like
> cooking.
>
> I have been wondering about the total pollution from a really  
> modern coal
> plant compared with the total pollution from a well made small  
> stove - for
> cooking.
>
> If you use an electric stove with an efficiency of 50%, only 12% of  
> the
> coal's heat reaches the water in the pot.  No better than an open  
> fire.  For
> space heating, a local fire is far better than an electric heater!   
> Perhaps
> it is 7 times more efficient.
>
> Best regards
> Crispin in Maputo
>
>
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