Navitron Renewable Energy and Sustainability Forum

SOLAR THERMAL => Solar Cooking (using vacuum tubes or more conventional methods) => Topic started by: daftlad on March 13, 2010, 02:01:24 PM



Title: How is this for a solar cooker?
Post by: daftlad on March 13, 2010, 02:01:24 PM
I saw this the other day and wonder what you thought?


Title: Re: How is this for a solar cooker?
Post by: Moxi on March 13, 2010, 02:09:19 PM
Nice but a tad large for the average garden, the planet mechanics did something similar a while back and the main issue was the distribution of heat across the food to prevent burning, of course a similar problem for concave collectors also (if not more so?)

Moxi


Title: Re: How is this for a solar cooker?
Post by: EccentricAnomaly on March 13, 2010, 06:55:59 PM
What's the maximum output temperature of the Navitron-style tubes?  Obviously when heating water it'll be limited by the boiling point of the water at whatever pressure it's at but for something like baking I'm thinking it'll be limited by the need for the fluid in the tubes to condense.  I wonder what temperature that is.


Title: Re: How is this for a solar cooker?
Post by: desperate on March 13, 2010, 07:10:00 PM
Why not get rid of the tube and fit a length of cast iron gutter at the focus and cook directly in that?

Desp


Title: Re: How is this for a solar cooker?
Post by: daftlad on March 14, 2010, 07:18:26 AM
There is a pot that looks a bit like a pressure cooker at the end of the tube and it was bubbling nicely. The connection between the tube and the pot looked like it was designed by Mr Heath and his mate Mr Robinson!
All food for thought.
ta ta


Title: Re: How is this for a solar cooker?
Post by: Moxi on March 14, 2010, 09:33:43 AM
Desperate,

Cast iron would certainly improve the process IMHO by distributing the heat more evenly and in the great british climate it would also allow for cooking on days with sunny spells with cloudy intervals, something of a must really lol.

Moxi


Title: Re: How is this for a solar cooker?
Post by: desperate on March 14, 2010, 08:45:29 PM
I was thinking that the food could be fed into one end of the gutter and slide down at a rate determined by the drop and and straight into my waiting mouth, or if you want to be posh, you could have a running outlet serving into a plate. fpig: sort of Desperate Dan style methinks

Desperate