Solar oven

=Solar Oven= Dror Zchori is at again, this time a novel solar oven has been built at Adamama.



Instead of the standard design requiring a tracking dish and cooking outside on a rickety setup, that works only around solar noon, Dror has come up with a new take on solar cooking.



The idea is to use several 40NIS selective-radiation vacuum tubes (standard for high-temp solar water heating).

These have a high stagnation temperature of 300C due to the selective radiation coating and vacuum construction, providing excellent insulation; one end is closed and the other open in the style of a thermos.



The tubes are placed into small holes in a preferably South-facing external wall



and the open ends open into an oven within the house.



Nearly perfect gas-tight fitting of the tubes is accomplished by means of a silicon sheet with slightly undersized holes punched into it.



For increased power the first prototype has both a parabolic reflector



and a wall reflector



which were chosen for simplicity over a compound parabolic reflector.

Chef Gur is currently evaluating the system, using it for steaming and some boiling. The high insulation of the oven and large thermal mass of a pot of water always in the oven allow for cooking at night, in a steamy environment that's good for many types of cooking - rice, corn, bread, soups, etc.