Solar heat boiler

Claim 1

A boiler cavity comprising: means for supplying concentrated sun radiation energy inside the boiler cavity; means for distributing the incoming radiation energy throughout the boiler cavity; means for depositing this incoming radiation energy evenly on the walls of the boiler cavity; means for maintaining the temperatures of the wall of the boiler cavity almost equal at all locations on that wall; a central section of boiler cavity wall for directly receiving the sun radiation; a peripheral section of boiler cavity wall for receiving indirectly the sun radiation; means for providing that central section surface facing the incoming radiation energy to have a high reflectivity; means for providing that peripheral section surface facing the central section to have a high absorptivity; means for providing the removal of the heat deposited on the wall of the boiler cavity by a cooling fluid to be used elsewhere; means for monitoring the cooling fluid flow to match the heat removal needed to keep the temperatures of the boiler cavity wall equal; and means for introducing and collecting the cooling fluid at locations on the boiler cavity wall such that the temperature differences between the cooling fluid and the boiler cavity wall are kept constant and close to the values required to insure maximum efficiency of the heat transfer process that takes place.