Photovoltaic concentrator assembly with optically active cover
A photovoltaic concentrator assembly that includes a housing that defines an internal volume and includes a rim, wherein the rim defines an opening into the internal volume, a photovoltaic cell positioned in the internal volume, and an optical element that includes an optically active body and a flange extending outward from the body, wherein the flange is sealingly engaged with the rim of the housing to enclose the internal volume.
1. A photovoltaic concentrator assembly comprising:
a housing having an annular upper portion and an annular lower portion defining an internal volume, said annular upper portion including an annular upper portion rim having an opening into said internal volume from an exterior of said housing, and including a first sealing surface, and said annular lower portion including an annular lower portion rim and a second sealing surface, said annular upper portion and said annular lower portion being connected at said first and said second sealing surfaces;
a photovoltaic cell mounted on said lower housing portion and positioned in said internal volume opposite said opening;
an optical element including a transparent optically active body extending across said opening to close said internal volume; and
a flange extending outward from and extending about an entire periphery of said optically active body, said flange having an upper surface shaped to engage and form a seal with said annular upper portion and a lower surface shaped to engage and form a seal with said annular lower portion such that said flange is clamped between said annular upper portion and said annular lower portion to form a seal with said annular upper portion and said annular lower portion about said entire periphery of said optically active body, wherein said flange is sealingly clamped between said annular upper portion rim and said annular lower portion rim to enclose said internal volume.
2. The photovoltaic concentrator assembly of claim 1 , wherein said annular upper portion rim and said annular lower portion rim are located radially inward of said sealing surfaces of said upper and said lower housing portions.
3. The photovoltaic concentrator assembly of claim 1 , further comprising a sealing member disposed between said housing upper portion sealing surface and said housing lower portion sealing surface to create a vapor-tight seal therebetween.
4. The photovoltaic concentrator assembly of claim 1 , further comprising a sealing member disposed between each of said annular lower portion rim and said annular upper portion rim and said flange.
5. The photovoltaic concentrator assembly of claim 4 , wherein said sealing member includes an O-ring.
6. The photovoltaic concentrator assembly of claim 1 , wherein said optically active body and said flange are formed as a monolithic body of glass.
7. The photovoltaic concentrator assembly of claim 1 , wherein said optically active body includes a refractive lens.
8. The photovoltaic concentrator assembly of claim 1 , wherein said optical element further comprises a guide having a proximal end coupled to said optically active body and a distal end aligned with said photovoltaic cell.
9. The photovoltaic concentrator assembly of claim 8 , wherein said guide extends through a window in a light shield positioned between said optical element and said photovoltaic cell.
10. The photovoltaic concentrator assembly of claim 1 , wherein said lower housing portion includes a light shield received in said internal volume and disposed between said optical element and said photovoltaic cell, wherein said light shield defines a window that is aligned with said photovoltaic cell.
11. The photovoltaic concentrator assembly of claim 10 , wherein said light shield includes an upper sealing surface shaped to engage said flange lower surface about said entire periphery of said optical element to form a seal with said flange lower surface when said upper and lower housing portions are clamped together by said fasteners.
12. The photovoltaic concentrator assembly of claim 11 , further comprising a sealing member disposed between said flange and said light shield.
13. The photovoltaic concentrator assembly of claim 1 , further comprising a sealing member disposed between said housing and said flange.
14. The photovoltaic concentrator assembly of claim 1 , wherein at least a portion of said optically active body extends through said opening.
15. The photovoltaic concentrator assembly of claim 1 , wherein said seal is a vapor-tight seal.
16. The photovoltaic concentrator assembly of claim 1 , further comprising a heat exchanger coupled to said housing.