Development and investigation of a CPV module with Cassegrain mirror optics

Dreger, Max; Wiesenfarth, Maike; Kisser, Arne; Schmid, Tobias; Bett, Andreas W.

doi:10.1063/1.4897055

Cited by 12 publications

(9 citation statements)

References 4 publications

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“…The performance results are comparable to those of other Cassegranian designs, with optical efficiencies from 0.62 to 0.85, CAP* values from 0.36 to 0.47, and geometrical concentration ratios from 500X to around 1060X-much lower than in the proposed design [9,10,11,12,13]. Concerning the irradiance distribution over the solar cell, other two-mirror-based designs show values around 1.5 [13] and 2.5 [12].…”

Section: Anal S S Of Resultssupporting

confidence: 63%

Investigating the optical performance of Cassegrainian systems at ultra-high concentrations

Ferrer‐Rodríguez¹,

Férnández²,

Almonacid³

et al. 2016

AIP Conference Proceedings

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Abstract.A Cassegrainian optical design reaching ultra-high concentration fluxes (more than 1000 suns) is presented. The system is based on the use of four independent off-axis pairs of parabolic-hyperbolic reflectors that concentrate sunrays onto a central receiver (TOE, tertiary optical element) which works as a Köhler integrator. This design reaches an effective concentration ratio simulated of 1682 suns while using relative small mirrors. The acceptance angle characteristic is analyzed in terms of both the detailed ray tracing on the TOE and the irradiance pattern on the solar cell for a misalignment situation near to the acceptance angle of the design, which is 0.61º.

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Section: Anal S S Of Resultssupporting

confidence: 63%

Investigating the optical performance of Cassegrainian systems at ultra-high concentrations

Ferrer‐Rodríguez¹,

Férnández²,

Almonacid³

et al. 2016

AIP Conference Proceedings

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“…However, there are exceptions to this with increasing focus on improving acceptance angles for HCPVs [13].…”

Section: Optical Tolerance Etendue and Solar Trackingmentioning

confidence: 97%

“…It often requires a tertiary optic to improve the acceptance angle, but there are methods to avoid this such as decreasing the path length of light rays within the system. This decreases the effect of error on the final light ray position [13]. The cassegrain reflector arrangement allows the PV receiver to be mounted below the main reflector.…”

Section: Ideal Conditions and The Classic Cassegrainmentioning

confidence: 99%

High-Concentration Optics for Photovoltaic Applications

Shanks

Mallick

2015

High Concentrator Photovoltaics

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The concept of a high-concentration optical system is introduced detailing the various design types and focusing only on those aimed at photovoltaic (PV) applications. This will include point focus, line focus, imaging, nonimaging, and the classical cassegrain set-up. The theory of high-concentration optics is explained in terms of idealised concepts and maximum limits for each concentrator type and combination. The optical system is broken down into the different stages and materials possible in a high-concentration configuration. The physics of reflective and refractive optics are described, and their associated errors, advantages and a brief overview of past milestones, and recent research trends in the area of high-concentration PVs are presented. Current primary and secondary optics are geometrically explained covering Fresnel, parabolic, heliostat, compound parabolic, hyperboloid, v-trough, and dome-shaped optics. This chapter also covers examples of new secondary optics, such as the three-dimensional crossed-compound parabolic concentrator and the square elliptical hyperboloid concentrator. The aim of this chapter is to provide the basic optical behaviour of high-concentration designs aimed at PV applications considering their geometry, materials, and reliability.

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“…Lens‐based HCPV modules without secondary optics have shown acceptance angles of approximately 0.5° . For CPV systems with mirror optics, 0.8° has been reported . A target value of 0.8° is defined in this work. The peak‐to‐average ratio (PAR) of the expected irradiation at the cell level benchmarks its homogeneity.…”

Section: Investigated Module Conceptsmentioning

confidence: 99%

“…12 For CPV systems with mirror optics, 0.8°has been reported. 13 A target value of 0.8°is defined in this work.…”

Section: The Acceptance Angle Defined As the Angle Of Module Inclinamentioning

confidence: 99%

Systematic design evaluation on the example of a concentrator photovoltaic module with mirror optics and passive heat dissipation

Wiesenfarth

Gamisch

Jakob

et al. 2018

Progress in Photovoltaics

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In the design of concentrator photovoltaic modules, numerous components need to be optimised to achieve the highest performance of the complete system while simultaneously maintaining low costs for the manufacturing processes. In this paper, we present a systematic analysis of different designs of concentrator photovoltaic modules using mirror optics to concentrate the solar radiation by a factor of 1000 with passive heat dissipation. Module designs based on 4 different arrangements for the optics are investigated: on‐axis, asymmetrical, and Cassegrain with and without tertiary optics. Each design is optimised for high thermal, optical, and electrical performance via finite element method, ray tracing, and network simulations. Concepts for manufacturing are also proposed. The 4 specific designs are evaluated and compared in a systematic benefit analysis. In this analysis, 9 criteria are defined to describe the module performance and manufacturability. To quantify the benefit of each module design, utility values—a score to provide a value to the benefit—and weighting factors are defined. With this systematic analysis, the strengths and potential for optimisation are identified, and the different designs are compared. In addition, the potential for improvement is discussed surveying the different criteria.

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Development and investigation of a CPV module with Cassegrain mirror optics

Cited by 12 publications

References 4 publications

Investigating the optical performance of Cassegrainian systems at ultra-high concentrations

Investigating the optical performance of Cassegrainian systems at ultra-high concentrations

High-Concentration Optics for Photovoltaic Applications

Systematic design evaluation on the example of a concentrator photovoltaic module with mirror optics and passive heat dissipation

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