Can-shaped container for use in solar cooker to collect solar energy, has external envelope that is transparent to solar rays and separated from internal envelope by gas or partial vacuum to limit heat loss by radiation and convection

摘要

The container has a metallic external envelope (3) and an internal envelope (2) that are separated by gas or partial vacuum for limiting heat loss by radiation and convection. The external envelope is transparent to solar rays, and is painted in black color to absorb maximum solar energy and limit emission of solar energy. A closure e.g. screw type stopper or cover, limits the loss by evaporation.