Concentrator solar photovol taic array with compact tailored imaging power units

Abstract

Solar panels and assembled arrays thereof include a collection of relatively compact, high-capacity power units. Optical components of each power unit include a front window or surface glazing, a primary mirror, secondary mirror and receiver assembly. Primary and secondary mirrors are defined by respective perimeters, at least a portion of which may be substantially coplanar and in contact with the front window. Some primary mirrors are configured with a perimeter of alternating full and truncated sections, and are curved to a base portion forming a pilot hole therein. Receiver assembly mechanical components include an alignment tube for mating with the primary mirror's pilot hole and for housing a photovoltaic solar cell. A base plate provided adjacent to the alignment tube serves to radiate heat emitted by the solar cell, and in some embodiments an additional heat sink provides further passive cooling. A tapered optical rod also provided within the receiver assembly directs received sunlight to the solar cell where electrical current is generated.

Description

BACKGROUND OF THE INVENTION [0001] It is generally appreciated that one of many known technologies for generating electrical power involves the harvesting of solar radiation and its conversion into direct current (DC) electricity. Solar power generation has already proven to be a very effective and “environmentally friendly” energy option, and further advances related to this technology continue to increase the appeal of such power generation systems. [0002] A particular type of module utilized in conventional solar systems employs photovoltaics or “PV” cells, in which an electrical field is created at the P-N junction of a silicon wafer or other semiconductive material. PV cells may be configured into modules and arrays that convert impinging solar radiation into electrical power, and can be employed in a wide variety of applications, such as charging batteries, operating motors, powering electrical loads, etc. As a power generation and distribution solution, PV modules can provide...

AI Technical Summary

Benefits of technology

[0005] Many embodiments of the presently disclosed technology provide for a power unit design that is axially compact (such as less than about 20 cm in some embodiments). Reduced dimensions and cost as well as relative ease of assembly are some of the many advantages afforded by select embodiments of the presently disclosed technology.

[0006] Yet another advantage in accordance with certain embodiments of the present invention concerns the completely passive cooling options offered in each power unit design. The concentrator assembly of each power unit is positioned at the back of each power unit, thus providing it in a location that can be readily cooled. Concentrator units may include a heat spreading element consisting of a relatively large base plate that functions as a simple heat spreader and serves to provide certain mechanical functionality for the assembly as well to radiate heat emitted by the concentrator assembly's solar cell. In some embodiments, an additional heat sink element may also be provided adjacent to each solar cell for further passive cooling.

[0007] A still further advantage of some embodiments of the present technology concerns the relatively liberal optical tolerances that are a result of the precise design and configuration of optical components in each power unit. The size and position of primary and secondary mirrors relative to one another and relative to an optical rod in each concentrator assembly yields an arrangement in which received sunlight can be concentrated to a given focal point with some degree of flexibility and potential misalignment.

[0008] Exemplary embodiments of the present invention also offer optimized combinations of mechanical rigidity and panel area efficiency. Primary mirror shapes and arrangements are presented that minimize structural weakness along a front panel surface while also ensuring that a maximum amount of space is available for exposure to potential sunlight. One particular exemplary embodiment employs near-hexagonal shaped primary mirrors that are collectively arranged in a honeycomb array that provides a strong and relatively lightweight configuration that is potentially frameless and is characterized by high levels of panel efficiency.

Problems solved by technology

Although many PV assemblies and related solar systems have been developed, no single design has captured the above preferences and others associated with the present subject matter.

Images