The minimum control would be enough to prevent food from over cooking and
to turn up the heat to a point necessary to perform the cooking task.
----- Original Message -----
From: "Crispin Pemberton-Pigott" <[email protected]>
To: "Stoves" <[email protected]>
Sent: Friday, May 03, 2013 5:11 PM
Subject: Re: [Stoves] Stove Definition - controllability
Dear Frank
I am not in any position to say how people turn down their fires. By that
I mean this is a performance based approach, not a prescription in any
way. There are good reasons why people use an open fire. One is that the
fire is very controllable.
I will address the efficiency determination separately. One thing at a
time, though I agree with your HHV number the pure carbon. I think the H2
number you gave is the LHV (117 MJ/kg).
So I am proposing that we segregate cooking appliances into functional
categories with BASIC characterisations for each. They are of course
driven by the customers and what they think when they buy something.
A BBQ (barbie, braai) is a category of appliance that is largely use for
roasting and grilling. It usually has very little power control with the
food being raised or lowered, covered or not as a means of control.
A kettle is a water heater that shuts off automatically if it is
electrical. Is that available for LPG or wood pellets or ethanol? Why not?
Maybe no one asked.
Many people boil a small quantity if water, up to perhaps 2 litres. Cecil
has identified this as a 'class' of cooking activity. Heating tea in the
evening or morning is common. Sometimes people use LPG for this even if
they rarely use it for anything else. This a task highly suited of a small
stove that requires no attention and has zero controllability save being
turned on and off.
Translate that into larger units for heating 5 or 10 or 20 litres of water
at a time. None of these require turn down. But none of them are 'cooking
stoves'.
The requirement, literally, for cooking is a controllable heat source. So
the question is on the floor: how much control is enough to be a minimum?
Regards
Crispin
From BB9900
-----Original Message-----
From: "Frank Shields" <[email protected]>
Sender: "Stoves" <[email protected]>
Date: Fri, 3 May 2013 11:02:49
To: 'Discussion of biomass cooking
stoves'<[email protected]>
Reply-To: Discussion of biomass cooking stoves
<[email protected]>
Subject: Re: [Stoves] Stove Definition - controllability
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
[email protected]
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://stoves.bioenergylists.org/
_______________________________________________________
Unlimited Disk, Data Transfer, PHP/MySQL Domain Hosting
http://www.doteasy.com
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
[email protected]
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://stoves.bioenergylists.org/
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
[email protected]
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://stoves.bioenergylists.org/
