Method for providing an optimum heat exchange within an assemby consisting of a heat-conducting absorbing plate and a heat transfer fluid

Device for optimizing heat exchanges:

• between a heat-conducting absorbing plate exposed to heat radiation and a heat transfer fluid flowing in at least one heat-conducting tubular conduit in thermal contact with said plate,
• and within the heat transfer fluid,
• in order to promote heat exchanges,
• wherein areas of said plate form a portion of the wall of said conduit so that the heat transfer fluid is in direct contact with said plate so as to reduce the thermal resistance between the plate and the heat transfer liquid flowing inside said conduit;
• the conduits being positioned on both faces of the plate and communicating with each other via ports made on the plate so as to impose to the heat transfer liquid a meandering path thereby providing homogenization of the temperature of the heat transfer fluid and reduction of the laminar effect;
• an absorbing heat radiation material is applied on one of the two faces of said plate as well as on the external walls of said conduits located on this face;
• each tubular conduit consists of a profiled member having a longitudinal central concavity edged with two opposite side wings which substantially extend in a same plane, both of said side wings being sealably attached on one face of the plate;
• wherein the concavities of the profiled members are closed at their ends with bulging transverse walls provided with a rim which extends into the plane of the side wings, in their extension.