Florian Sutter
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View article: Setup for Long‐Term Outdoor Testing of Optically Modified PV Modules Regarding their Thermal and Electrical Behavior Under Load
Setup for Long‐Term Outdoor Testing of Optically Modified PV Modules Regarding their Thermal and Electrical Behavior Under Load Open
Optical modifications of the light‐facing side of photovoltaic (PV) modules can be used to increase their efficiency by implementing anti‐reflective or anti‐soiling properties or by achieving a reduction of the operating temperature. Furth…
View article: Soiling of solar-field heliostats during operation in concentrating solar thermal plants
Soiling of solar-field heliostats during operation in concentrating solar thermal plants Open
Solar energy conversion is highly affected by soiling of collector surfaces, potentially decreasing the yield of running systems. Design, operation, and maintenance strategies of solar energy plants have the potential to mitigate the most …
View article: Evaluation of parameters to characterize the aging of solar reflector materials
Evaluation of parameters to characterize the aging of solar reflector materials Open
The evaluation of the degradation of solar reflectors for concentrating solar thermal applications is of primary importance for material development and to guarantee the optimal optical quality of the solar field over an extended life time…
View article: Detection of corrosion on silvered glass reflectors via image processing
Detection of corrosion on silvered glass reflectors via image processing Open
A novel characterization technique based on image analysis is presented, intended to complement state-of-the-art reflectometer measurements. The technique is developed by experts from different laboratories (OPAC, AGC, CEA and LNEG), which…
View article: Coatings for CSP Lifetime
Coatings for CSP Lifetime Open
The feasibility and performance of tower-technology-based concentrated solar power (CSP) is highly dependent on the efficiency of the energy transformation from sun to heat at the receiver. The higher the solar absorptivity of the receiver…
View article: Simulation of shortwave infrared ratio thermometers for the remote opto-thermal characterisation of central external receivers
Simulation of shortwave infrared ratio thermometers for the remote opto-thermal characterisation of central external receivers Open
The accurate knowledge of the receiver surface temperature Tsurf is important for a safe, efficient and durable power plant operation. Its distribution is typically measured in real time using ground-based longwave infrared (LWIR) thermal …
View article: Effect of Operation Time on the Performance and Accuracy of the Condor Reflectometer
Effect of Operation Time on the Performance and Accuracy of the Condor Reflectometer Open
This paper evaluates the potential effect that operation lifetime could have on the accuracy and reproducibility of the Condor reflectometer. For this purpose, three Condors with different operation lifetimes have been used and compared in…
View article: Electrothermal Modeling of Photovoltaic Modules for the Detection of Hot-Spots Caused by Soiling
Electrothermal Modeling of Photovoltaic Modules for the Detection of Hot-Spots Caused by Soiling Open
Solar energy plays a major role in the transition to renewable energy. To ensure that large-scale photovoltaic (PV) power plants operate at their full potential, their monitoring is essential. It is common practice to utilize drones equipp…
View article: Round Robin Test of Absorptance and Emittance of Particles for CSP
Round Robin Test of Absorptance and Emittance of Particles for CSP Open
Precise knowledge of particle optical properties is crucial to the advancement and success of directly-irradiated particle receiver technologies. This work presents the results of a Round Robin Test (RRT) that was conducted between seven l…
View article: Integrated Concentrating Solar/Photovoltaic Hybrid Concepts—Technological Discussion, Energy Yield, and Cost Considerations
Integrated Concentrating Solar/Photovoltaic Hybrid Concepts—Technological Discussion, Energy Yield, and Cost Considerations Open
Concentrating solar thermal (CST) technologies are a sustainable way to produce high‐temperature heat. Four concepts of integrating photovoltaics (PV) into CST plants, namely Rear‐PV, PV‐Mirror, bifacial PV‐Mirror and Spillage‐concentratin…
View article: Performance improvement of CSP particle receivers by depositing spinel absorber coatings
Performance improvement of CSP particle receivers by depositing spinel absorber coatings Open
The challenging development/modification of particles to meet the requirements of thermal stability, high absorptance and mechanical resistance with minimal economical cost is a key point to attain for the next particle receivers of concen…
View article: Comparison of Commercial Reflectometers for Solar Mirrors
Comparison of Commercial Reflectometers for Solar Mirrors Open
The important in-field characterization of solar mirror reflectance can be performed by a variety of commercial portable reflectometers. In this study the most common commercially available reflectometers are evaluated in a campaign compar…
View article: Intercomparison of opto-thermal spectral measurements for concentrating solar thermal receiver materials from room temperature up to 800 °C
Intercomparison of opto-thermal spectral measurements for concentrating solar thermal receiver materials from room temperature up to 800 °C Open
An intercomparison of opto-thermal spectral measurements has been performed for some relevant receiver materials in concentrating solar thermal applications, from room temperature up to 800°C. Five European laboratories performed spectral …
View article: Innovative lifetime testing protocol for high-temperature secondary reflector materials used in concentrated solar thermal energies
Innovative lifetime testing protocol for high-temperature secondary reflector materials used in concentrated solar thermal energies Open
The actual energy market based on fossil fuels is the responsible of more than half of the greenhouse gases generated worldwide. Renewable energies play a fundamental role to lead the transformation towards an energy market less damaging f…
View article: Secondary reflectors tested at high temperatures and high radiation intensities
Secondary reflectors tested at high temperatures and high radiation intensities Open
A prototype secondary reflector demonstrator for a solar power tower was designed, constructed, and tested at the synthetic sun facility in Jülich Germany "Synlight". The concept was a secondary reflector system that avoided water cooling.…
View article: Particle optimization by modifying chemical composition
Particle optimization by modifying chemical composition Open
Different generations of fused and granulated particles with improved mechanical properties were developed by Saint-Gobain and proposed to the partners. The granulated particles GEN4 present the best compromise in terms of performance vers…
View article: RAISELIFE project extends the lifetime of functional CSP materials
RAISELIFE project extends the lifetime of functional CSP materials Open
The RAISELIFE project was conducted from April 2016 until March 2020 and was funded within the H2020 program of the European Commission (Grant 686008). The project aimed at developing novel materials with extended lifetime and performance …
View article: UV degradation of primary mirrors in outdoor exposure and accelerated aging
UV degradation of primary mirrors in outdoor exposure and accelerated aging Open
Concentrating solar thermal (CST) energy plays a fundamental role in the energetic transition which is facing our society. The energy generation of these systems hugely depends on the optical behavior of the reflectors. CST plants are inst…
View article: A guideline for realistic accelerated aging testing of silvered-glass reflectors
A guideline for realistic accelerated aging testing of silvered-glass reflectors Open
Accelerated aging testing can be a useful tool to evaluate the durability of solar reflectors for CSP applications.The selection of suitable testing procedures and parameters is essential to be able to create viable results.Despite importa…
View article: A comparative analysis of opto-thermal figures of merit for high temperature solar thermal absorber coatings
A comparative analysis of opto-thermal figures of merit for high temperature solar thermal absorber coatings Open
Solar thermal absorber coatings play a key role in the thermal efficiency of receivers for applications in the field of Concentrated Solar Power (CSP). The development of stable spectral selective coatings with a high solar absorptance αso…
View article: Lifetime prediction model of reflector materials for concentrating solar thermal energies in corrosive environments
Lifetime prediction model of reflector materials for concentrating solar thermal energies in corrosive environments Open
Concentrated solar thermal technologies play an essential role in the energetic transition which is currently facing our society. The energy generation in this technology vastly depends on the optical behaviour of the reflector materials o…
View article: Sandstorm erosion on solar reflectors: Highly realistic modeling of artificial aging tests based on advanced site assessment
Sandstorm erosion on solar reflectors: Highly realistic modeling of artificial aging tests based on advanced site assessment Open
In this work a guideline is developed which allows for a highly realistic laboratory simulation of sandstorm effects on glass components for the solar industry. So far no standardized test procedure is developed to test components against …
View article: Uncertainty Study of Reflectance Measurements for Concentrating Solar Reflectors
Uncertainty Study of Reflectance Measurements for Concentrating Solar Reflectors Open
The solar reflector is one of the main components
\nof concentrated solar thermal systems. Therefore, accurate
\nknowledge of its solar-weighted, near-specular reflectance is
\nhighly important. Currently, this parameter cannot be properly…
View article: Forty shades of black: A benchmark of high temperature sprayable black coatings applied on Haynes 230
Forty shades of black: A benchmark of high temperature sprayable black coatings applied on Haynes 230 Open
The solar receiver coating opto-thermal efficiency has a significant impact on a central receiver system thermal final system efficiency. The development of durable high solar absorptance coatings with simple application process and minima…