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Sine-limiting microcell solar concentrators for space.

Christian J Ruud, Jeffrey M Gordon, Robert F McCarthy

|October 27, 2022

Summary

This summary is machine-generated.

This study introduces a novel V-cone tailored edge ray concentrator (V-TERC) for microcell concentrating photovoltaics (µCPV) in space. The V-TERC design significantly boosts solar power efficiency and reduces costs for space applications.

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Area of Science:

Optics and Photonics
Renewable Energy Technologies
Aerospace Engineering

Background:

Microcell concentrating photovoltaics (µCPV) offer potential for enhanced performance and cost reduction in space-based solar power.
Existing space µCPV systems face limitations in concentration ratio and specific power.

Purpose of the Study:

To introduce and validate an ultracompact V-cone tailored edge ray concentrator (V-TERC) for space µCPV.
To achieve a significant increase in concentration ratio and specific power for space solar applications.

Main Methods:

Nonimaging optics principles were applied to design the V-TERC concentrator.
Ray tracing simulations were performed to validate the optical design.
A proof-of-concept system with a triple-junction microcell and V-TERC optic was constructed and tested outdoors.

Main Results:

The V-TERC design enables operation near the sine limit, achieving a four-fold increase in concentration ratio for a given acceptance angle and specific power compared to previous designs.
Outdoor testing demonstrated a power conversion efficiency of 30% at a geometric gain of 137×.
The system achieved a specific power of 90 W kg⁻¹ with an acceptance angle of ±4.5°.

Conclusions:

The V-TERC concentrator represents a record combination of efficiency, gain, and specific power for µCPV systems.
This advancement is a significant step towards improving the efficiency and lowering the cost of solar power generation in space.