Patent ID: 8528542
Filing Date: 2013-09-10
Classification: F24S,F28F,Y02E

Abstract:
1. A solar collector, comprising a manifold and a plurality of heat exchangers, wherein each heat exchanger comprises: a vacuum tube having an inner wall, wherein the vacuum tube is a glass tube; a fluid-conducting pipe system adapted to hold a fluid, wherein the fluid-conducting pipe system comprises an outer wall connected to the manifold; at least one heat-conducting element made of metal connecting the inner wall of the vacuum tube to the outer wall of the fluid-conducting pipe system provided in a volume between the outer wall of the fluid conducting pipe system and the inner wall of the vacuum tube, wherein the volume is filled with ambient air or a protective gas; and means for collecting and concentrating solar energy provided on a side of the inner wall of the vacuum tube facing away from the at least one heat-conducting element, wherein the outer wall of the fluid-conducting pipe system is a metal wall, wherein each heat-conducting element is a flexible metallic sheet and extends in a spiral shape along a cross-section of the heat exchanger, covers an angle of at least 450 degrees, is attached at the outer wall of the fluid-conducting pipe system and prestressed against the inner wall of the vacuum tube and the fluid-conducting pipe system, such that the outer wall of the fluid-conducting pipe system is centered concentric to the inner wall of the vacuum tube, wherein the vacuum tube is indirectly resiliently connected to the-manifold by means of the prestressed heat-conducting elements and the fluid-conducting pipe system, and wherein the vacuum tube is suspended on the at least one heat-conducting element without physical contact with the manifold or the fluid conducting pipe.