| 摘要 |
The present invention relates to a solar collector (100) comprising a containment box-like structure (1), having a lower face, four perimeter faces and an upper face closed by an at least partially transparent surface (12), inside said box-like structure (1) being housed: an upper absorber (13) for exposure to solar radiation, arranged below said at least partially transparent surface (12), a primary circuit (21) for accumulation and circulation of a primary thermovector fluid, at least a secondary conduit (22) of accumulation and circulation of a secondary fluid, and at least a heat exchanger (8) between said primary thermovector fluid and said secondary fluid, said at least a secondary conduit (22) comprising at least one inlet opening (23) and at least an outlet opening (24) of said secondary fluid which are accessible externally to said box-like containment structure (1), said primary circuit (21) comprising at least a first portion (5, 6, 7), thermally connected to said upper absorber (13) and provided in its lower part, and at least a second portion (9, 16, 17) thermally connected to said at least a secondary conduit (22) in correspondence of said heat exchanger (8), said at least a second portion (9, 16, 17) and said at least a secondary conduit (22) being provided below said at least one first portion (5, 6, 7) and between said at least a first portion (5, 6, 7) of said primary circuit (21) and said at least a secondary conduit (22), at least one layer of insulating material (14) being provided in such a way that, during use, when said primary thermovector fluid flows in said primary circuit (21), said primary thermovector fluid and said secondary fluid circulate in countercurrent in said heat exchanger (8), said at least a secondary conduit (22) being configured so as to present at least a portion, having predominantly linear sections (2) and union portions (3, 4, 3', 4') between said sections predominantly linear (2), said at least a second portion (9, 16, 17) of said primary circuit (21) being configured in such a way to form a coil duct at least partially inserted in said at least a secondary conduit (22), so as to be in direct thermal contact with said secondary fluid, and in such a way to comprise a plurality of pairs of predominantly straight sections (9) connected in series by means of first (16) and second (17) unions in such a way to form said coil duct and in that said first unions (16) are external to said secondary conduit (22) and in that said second unions (17) are disposed inside said at least a secondary conduit (22). |
