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Modular solar energy collector systems
| Details |
Inventors: Knoos, Stellan;
Assignee: AGA Aktiebolag (Lidingo, SE)
Primary Examiner: Wayner; William E.
Assistant Examiner: Tanner; Harry
Attorney, Agent or Firm: Fraser and Bogucki
A readily fabricated, high efficient modular solar energy collector that may be arranged in a wide variety of arrays comprises a relatively small, typically but not necessarily rectangular, panel structure that is centrally coupled to an insulative support that may define an outlet conduit. In a specific example, a pair of coextensive, thermally conductive panels, the outer one of which preferably has a light absorptive black upper surface of low emissivity, defines flow paths directed laterally inwardly from side margins of the panel to a central mid-line region at which outlet apertures flow into a manifold region under the panel. The heated fluid in the manifold communicates with an outlet conduit within the support that is connectable at its respective ends to like conduits of adjacent modules. The centrally supported panels are sufficiently rigid to need no additional support, and freely expand and contract in response to temperature changes. An array of modules of this character may be mounted adjacent a single transparent cover of larger size, and for low ambient temperature regions may include an individual transparent cover for each module. The construction further permits swiveling of individual lines of modules so as to assume optimum angles to incident radiation. Despite the relatively small module size, high temperature differentials are achieved with high efficiency, and great flexibility is permitted in the arrangement of an array, which also can have good aesthetic appearance. All modules may be arranged to communicate with a heat exchanger system, such as an air-to-water heat exchanger. |
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DETAILED DESCRIPTION Solar collector panels in accordance with the invention are relatively small modular units having a surface panel and a backing panel member coextensive therewith but closely spaced therefrom, to define an interior flow space, while at the same time including intermediate spacers and a peripheral seal that establish a cantilevered self-supporting structure.
Flow paths for heated fluid within the flow space are directed laterally inwardly from the panel periphery toward a mid-line region, into communication with an underlying channel that forms part of the backing member.
An insulative support structure is coupled to support the radiation panel structure in its central region, and also includes an interior conduit in communication with the manifold and providing a hot gas outlet for joinder to like serially disposed modules.
The array of modules may be mounted under a large frame that is constructed solely for support of the transparent cover, but individual intermediate covers may also be mounted on the modules.
This arrangement is readily fabricated, easily transported, quickly assembled or replaced, and can be arranged in a wide variety of arrays having pleasing aesthetic appearance if desired.
In accordance with more specific aspects of the invention, individual modules may be constructed to utilize the dual flow concept.
For example, the modules may be of square configuration, with an array of inlet apertures along opposite sides substantially parallel to the mid-line region and with the bypass apertures in the interior region of the collector panel.
With a selective coating on the collector surface, and using the dual flow principle, high temperature differentials can be realized in heating air or other working fluid, with very low time constants and with high efficiency, in a panel that is only 0.
25 m.
sup.
2 to 1 m.
sup.
2.
Further, the insulative support member may be configured as a central base portion enclosing a linear hot air conduit parallel to the mid-line axis, and in close communication with the manifold
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