Patent ID: 8039732
Filing Date: 2011-10-18
Classification: F24S,Y02E

Abstract:
1. A method comprising the steps of: a. providing a chamber defining an internal volume, wherein the chamber comprises a plurality of elongate portions joined serially at alternate ends to neighbouring elongate portions by semicircular portions, a first of the plurality of elongate portions being joined to a serially last of the elongate portions by a U-shaped portion, to form a re-circulating chamber means, wherein the chamber is double walled to form an external coaxial jacket; b. providing an inlet port communicating with the internal volume, wherein the inlet port comprises an inlet tube communicating with the internal volume and a longitudinal axis of the inlet tube is inclined at an acute internal angle to a longitudinal axis of an elongate portion of the chamber means; c. admitting solar energy through the inlet port into the internal volume such that the entering solar energy is absorbed and repeatedly reflected within the chamber until substantially all the entering solar energy is absorbed by the chamber; d. providing means for absorbing photons entering the chamber.