A5081129941- Photovoltaic System Optimization Techniques
- Silicon and Solar Cell Technologies
- Solar Radiation and Photovoltaics
- solar cell performance optimization
- Solar Thermal and Photovoltaic Systems
- Thin-Film Transistor Technologies
- Photovoltaic Systems and Sustainability
- Chalcogenide Semiconductor Thin Films
- Integrated Circuits and Semiconductor Failure Analysis
- Impact of Light on Environment and Health
- Energy and Environment Impacts
- Electronic Packaging and Soldering Technologies
- CCD and CMOS Imaging Sensors
- Calibration and Measurement Techniques
- Silicon Nanostructures and Photoluminescence
- Smart Grid Energy Management
- Silicon Carbide Semiconductor Technologies
- Scientific Measurement and Uncertainty Evaluation
- Semiconductor materials and interfaces
- Industrial Vision Systems and Defect Detection
- Building Energy and Comfort Optimization
- Image Processing Techniques and Applications
- Remote Sensing and LiDAR Applications
- Advancements in Photolithography Techniques
- Semiconductor materials and devices
Fraunhofer Center for Silicon Photovoltaics
2018-2024
Fraunhofer Institute for Microstructure of Materials and Systems
2019-2024
Anhalt University of Applied Sciences
2018-2024
Renewable Energy Systems (United Kingdom)
2012-2023
Loughborough University
2011-2023
Centre for Research in Engineering Surface Technology
2016-2018
Northumbria University
2008
The effect of dust on photovoltaic modules is investigated with respect to concentration and spectral transmittance. Samples were collected in the form raw as well accumulated exposed sheets glass at different tilt angles. Spectral transmittance samples was determined. Transmittance variation between top, middle bottom identified for inclinations, where worst case seen a angle 30o non-uniformity 4.4% comparison 0.2% 90° tilt. measured data showed decrease wavelengths <570 nm. Integrating...
This work presents a validation of three satellite-based radiation products over an extensive network 313 pyranometers across Europe, from 2005 to 2015. The used have been developed by the Satellite Application Facility on Climate Monitoring (CM SAF) and are one geostationary climate dataset (SARAH-JRC), polar-orbiting (CLARA-A2) operational product. Further, ERA-Interim reanalysis is also included in comparison. main objective determine quality level daily means CM SAF datasets, identifying...
The electrical ageing of photovoltaic modules during extended damp-heat tests at different stress levels is investigated for three types crystalline silicon with backsheets, encapsulants and cell types. Deploying allows determination an equivalent dose function, which a first step towards lifetime prediction devices. derived humidity used to characterise the degradation power as well that solar cell's circuit parameters calculated from measured current–voltage characteristics. An application...
This paper uses site suitability analysis to identify locations for solar farms in the UK help meet climate change targets. A set of maps, each representing a given criterion, is created with geographical information systems (GIS) software. These are combined give Boolean map areas which appropriate large-scale farm installation. Several scenarios investigated by varying criteria, include (land use) factors, energy resource and electrical distribution network constraints. Some dictated...
The adoption of information and communication technology based centralized volt-var control (VVC) leads to an optimal operation a distribution feeder. However, it also poses challenge that adversary can tamper with the metered data and, thus, render VVC action ineffective. Distribution system state estimation (DSSE) acts as backbone VVC. Distributed energy resources (DER) injection measurements constitute leverage from DSSE point view. This paper proposes two solutions optimization malicious...
In this work, the impact of component reliability on large scale photovoltaic (PV) systems’ performance is demonstrated. The analysis largely based an extensive field-derived dataset failure rates operation ranging from three to five years, derived different large-scale PV systems. Major system components, such as transformers, are also included, which shown have a significant overall energy lost due failures. A Fault Tree Analysis (FTA) used estimate and availability for two inverter...
The increasing global demand for renewable energy necessitates a comprehensive understanding of solar photovoltaic (PV) system performance and reliability, particularly in harsh climates such as Iraq. Despite ambitious targets to diversify its sector, Iraq faces challenges the deployment PV projects due limited field experience. In this study, we assess reliability two different systems installed Basrah Baghdad, aged 3.5 8 years, respectively. Field analysis reveals prevalent issues...
The degradation of adhesion strength between the back sheet and encapsulant due to moisture penetration has been investigated for commercial crystalline silicon photovoltaic mini-modules. damp-heat tests originating from International Electrotechnical Commission qualification test were carried out at five different temperature relative humidity (RH) conditions (95 °C/85% RH, 85 65 °C/65% RH °C/45% RH). was measured by 90° peel tests, specified time intervals during degradation. Several...
The accuracy of outdoor performance a photovoltaic (PV) array can be improved by considering the spectral effects. In this paper, impact seasonal variations on three different silicon PV technologies: single junction amorphous (a-Si), Hetero-junction with Intrinsic Thin-layer (HIT) and multi crystalline (mc-Si) has been presented first time in Indian environmental conditions. effect HIT module technology along simultaneous study variation indicators useful fraction (UF), average photon...
The energy yield delivered by different types of photovoltaic device is a key consideration in the selection appropriate technologies for cheap electricity. currently on market, each have certain strengths and weaknesses when it comes to operating environments. There plethora comparative tests on-going with sometimes contradictory results. This paper investigates behaviour contrasting thin film technologies, specifically a-Si CIGS derivatives, places this analysis into context results...
The likelihood of system failure small systems is investigated in order to establish the risk associated for investment into a photovoltaic (PV) domestic applications. This achieved by reviewing existing literature on PV rates and using these as an input statistical yield simulation tool that considers repair. It typically assumed do not require any maintenance, but it shown this will have near catastrophic impact energy production systems. no maintenance likely scenario, register their...
Abstract Corrosion is one of the main PV module failure mechanisms, as it can cause severe electrical performance degradation in modules exposed to hot and humid environments. Moisture penetrating a photovoltaic (PV) may react with metallic components causing corrosion. In addition, acetic acid which produced by hydrolysis ethylene vinyl acetate (EVA), most common encapsulant, further degrade components. The specific chemical reactions involved corrosion mechanisms for different are well...
Reliability of polymeric encapsulants is being assured using suitable additives. Especially UV absorbers and stabilizers are important to protect the from solar radiation. Identifying additives their quantities essential for quality control lifetime predictions. In this work a new method quantitative additive characterization by pyrolysis-gas chromatography-mass spectrometry (PY-GCMS) presented. A general workflow qualitative analysis quantification proposed which based on solvent-free...
Encapsulation is a well-known impact factor on the durability of Photovoltaics (PV) modules. Currently there lack understanding relationship between lamination process and module durability. In this paper, effects different parameters encapsulant stability due to stress testing have been investigated from both on-site production quality long-term viewpoints. Rather than focusing single factors, paper evaluates using number indicators including EVA (ethylene-vinyl acetate copolymer) curing...
Polymer encapsulants used in photovoltaic (PV) modules experience severe UV aging during more than 25 years of module's operation. However, the current standard qualification tests cannot provide a sufficient solution able to mimic exposure field. IEC 61215 defines requirements for stability PV with very low cumulative dosage. While new 62788-7-2 imposes higher dosages on polymers films, testing procedure allows use either UV-A fluorescence lamps or xenon lamps, yielding different spectra....
Photovoltaic (PV) system reliability and durability investigations are essential for industrial maturity economic success. Recently, PV systems received much interest in Iraq due to many reasons—for instance, power shortage, global warming pollution. Despite this interest, the precise implications of harsh climates like remain uncertain. This work assesses component soiling using field experience historical data. study identifies most common failure modes installed similar climatic regions,...
A model for the annual performance of different module technologies is presented that includes spectral effects. The based on realistic reporting conditions but also allows secondary effects, as experienced by multi-junction devices. validated against measurements taken at CREST and shows a good agreement all Combining this relatively simple with ASPIRE, irradiance standard meteorological measurements, translation to other locations. method applied devices deployed in Loughborough University...
This article concerns the influence of measurement conditions on extraction a solar cell's equivalent circuit parameters. Influences previously not investigated are considered, thus helping to define suitable strategies. The influences environments investigated, as is fitting algorithm chosen. It shown that number points for current-voltage characteristic can have an important effect accuracy parameters extracted. stability system minor importance, long variations in monitored. We also show...