Large-scale and long-term CPV power plant field results

Gerstmaier, T.; Zech, Tobias; Röttger, M.; Braun, C.; Gombert, Andreas

doi:10.1063/1.4931506

Cited by 10 publications

(15 citation statements)

References 4 publications

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“…The early power plants with Concentrix technology were already installed and carefully monitored over the past years. It could be shown that availabilities over 98% and measured to predicted energies over 100% were achieved [5] indicating that no degradation could be observed. The 44 MW p power plant in Touwsrivier is an ideal case to provide insight in the reliability of this technology in the coming years.…”

Section: Power Plant Installation Acceptance and Operationmentioning

confidence: 86%

From 0.01 to 44 MWp with Concentrix technology

Gombert¹

2016

AIP Conference Proceedings

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Abstract. The Concentrix CPV technology was developed over the last ten years from a laboratory scale to an industrial scale with fully automized production lines and installed in multi MW CPV power plants. This paper describes the R&D work which was required to proceed from first prototypes to industrial products. Highlighted are significant steps to improve the performance of the CPV modules, the reproducibility of the production processes and the reduction of cost of the CPV system. The module efficiency was continuously increased resulting in a module efficiency of 33.8 % for the latest commercially available product and a world record efficiency of 38.9 % for a prototype module. A 44 MW p CPV power plant with Concentrix technology started operation in 2014 and reached a very homogeneous daily average DC efficiency of close to 25 % for 1.5 MW p blocks.

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Section: Power Plant Installation Acceptance and Operationmentioning

confidence: 86%

From 0.01 to 44 MWp with Concentrix technology

Gombert¹

2016

AIP Conference Proceedings

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“…The qualification standard IEC 62108 so far gives good indication that systems perform well in the field if they have received the certification. 8 Solar Systems, 255 Soitec, 12,18,256 Semprius, 218 Suncore, 10 and ISFOC from the plants in Puertollano 8 and Daido Steel 67 have shown performance data from 2 to 8 yr with no degradation observed. FIG.…”

Section: E Long Term Stability-durabilitymentioning

confidence: 97%

“…There are other "CPV specific" losses due to temperature dependence of the SoG lens and changes in spectral conditions. 12,253 All these losses are anticipated and are included in the accurate prediction models. Including these losses with the utilization factor, prediction accuracy for AC power production of <2% for a CPV site has been reported.…”

Section: Prediction Of the Energy Yield And Assessment Of Plant Pementioning

confidence: 99%

“…This can be explained by numerous mechanical parts. 215,254 In Gerstmaier et al, 12 failures of inverters are reported as the main cause for unavailability. Faster repairs are suggested to reduce failure time.…”

Section: Maintenance Incidence During Operation Of Cpv Plantsmentioning

confidence: 99%

“…The IEC 62108-certified lens-based systems with a capacity of 600 kW p showed no significant degradation. 7,8 The largest utility scale CPV installations so far-all based on multi-junction solar cells-were installed in Golmud, China, 138 MW p (58 MW p in 2012 and 79.8 MW p in 2013), [9][10][11] in Touwsrivier, South Africa, 44.19 MW p (2014), 12 in Alamosa, USA, 35.3 MW p (2012), 13 and in Delingha City, China, 12 MW (2016). 11 Another key innovation for CPV was the development of the technology for silicone-on-glass (SoG) Fresnel lenses.…”

Section: Introductionmentioning

confidence: 99%

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Challenges in the design of concentrator photovoltaic (CPV) modules to achieve highest efficiencies

Wiesenfarth

Antón

Bett

2018

Applied Physics Reviews

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Concentrator photovoltaics (CPV) is a special high efficiency system technology in the world of PV-technologies. The idea of CPV is to use optical light concentrators to increase the incident power on solar cells. The solar cell area is comparatively tiny, thus saving expensive semiconductor materials and allowing the use of more sophisticated and more costly multi-junction solar cells. The highest CPV module efficiency achieved is 38.9%. This CPV module uses four-junction III-Vbased solar cells. Moreover, mini-modules have already achieved an efficiency of 43.4%. The interaction between optics, cells, and layout of the module and tracker determines the overall field performance. Today, some utility scale CPV plants are installed. The CPV technology allows for many technical solutions for system designs and for optimizing performance while maintaining the economics. This paper will review the achievements and discuss the challenges for the CPV module technology and its components. We discuss the different components and the most important effects regarding the module design. Furthermore, we present the module designs that have shown the highest efficiencies.

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