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Sandia Capabilities for the Measurement, Characterization, and Analysis of Heliostats for CSP

Andraka, Charles E.; Ghanbari, Cheryl M.; Gill, David D.; Ho, Clifford K.; Kolb, William J.; Moss, Timothy A.; Yellowhair, Julius

The Concentrating Solar Technologies Organization at Sandia National Laboratories has a long history of performing important research, development, and testing that has enabled the Concentrating Solar Power Industry to deploy full-scale power plants. Sandia continues to pursue innovative CSP concepts with the goal of reducing the cost of CSP while improving efficiency and performance. In this pursuit, Sandia has developed many tools for the analysis of CSP performance. The following capabilities document highlights Sandia's extensive experience in the design, construction, and utilization of large-scale testing facilities for CSP and the tools that Sandia has created for the full characterization of heliostats. Sandia has extensive experience in using these tools to evaluate the performance of novel heliostat designs.

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A case study of a residential photovoltaic system with microinverters

World Renewable Energy Forum, WREF 2012, Including World Renewable Energy Congress XII and Colorado Renewable Energy Society (CRES) Annual Conferen

Ho, Clifford K.

This paper presents a case study of a 3 kW photovoltaic system with Enphase microinverters. A brief introduction to microinverters and central inverters is first presented, followed by an overview of the installation, features, operation, monitoring, and costs of the system. The monthly and annual energy production during the first three years is presented and compared against modeled results using the System Advisor Model. Various factors that have impacted the performance (e.g., shading, weather, temperature, wind, tilt, orientation) are discussed, and the performance of the system is compared against a simulated optimized system. The optimal sizing of microinverters is also discussed to explain why the power rating of the microinverter may be less than the power rating of the module to achieve maximum energy production.

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Results 351–400 of 567
Results 351–400 of 567