CPV generator with dish reflector and fly’s eye receiver

Hyatt, Justin; Davila, Christian; Didato, Nicholas; Peon, Rodolfo; Rademacher, Matt; Reshidko, Dima; Sodari, Frank; Strittmatter, P. A.; Vincent, Galen; Wheelwright, Brian; Zammit, Corey; Angel, Roger

doi:10.1063/1.5053507

Cited by 2 publications

(1 citation statement)

References 5 publications

(7 reference statements)

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“…While this is a much better option than using nitrogen, it is not desirable on the megawatt scale. Therefore, the next step is to remove the gas purging system altogether and encapsulate the cells with borosilicate cover glass, anti-reflection coated by a leaching process [3]. This will allow the receivers to operate in ambient air without risk to the cells.…”

Section: Humidity Controlmentioning

confidence: 99%

REhnu dish based CPV: Performance and reliability improvements based on a year of field experience

Didato

Sodari

Stalcup

et al. 2018

AIP Conference Proceedings

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REhnu has now built up a year of experience operating two M-8 CPV generators with dish-receiver architecture described in Stalcup et al. 2017 [1]. The M-8 generators use 8 primary collector mirrors made of backsilvered low-iron glass, 1.65 m square with a 1.5 m focal length. Small sealed receivers at each dish focus house 36 Solar Junction 3J cells operating at 950x concentration. Over the year of operation, a good measure of output power vs DNI and atmospheric conditions has been obtained. The efficiency varies through the day depending on air mass. The system is currently best matched to the solar spectrum at air mass 2. The daily peak CSTC efficiency averages 31%, with seasonal variation of ±1% through the year, peaking at 32% in August. Several improvements were made over the year to ensure reliability and to improve optical throughput. A dry air purging system has mitigated damage to the cells from moisture. Material upgrades to secondary reflectors in the receiver have resolved a runaway failure mode that went previously undetected due to inadequate testing time.

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Section: Humidity Controlmentioning

confidence: 99%