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Imec and EnergyVille Present Unique Simulation Framework to Accurately Determine Energy Yield of Bifacial Solar Modules and Systems - imec and EnergyVille present a new simulation framework that can accurately calculate the energy yield of bifacial PV systems (also capturing reflected light from the ground) - EnergyVille.be / imec-int.com
Imec and EnergyVille Present Unique Simulation Framework to Accurately Determine Energy Yield of Bifacial Solar Modules and Systems

 

NewswireToday - /newswire/ - Leuven, Belgium, 2019/02/12 - imec and EnergyVille present a new simulation framework that can accurately calculate the energy yield of bifacial PV systems (also capturing reflected light from the ground) - EnergyVille.be / imec-int.com.

   
 
 

Today imec, a world-leading research and innovation hub in nanoelectronics, energy and digital technologies and EnergyVille present a new simulation framework that can accurately calculate the energy yield of bifacial PV systems (also capturing reflected light from the ground). The high precision of the new simulation framework compared to existing approaches comes from the fact that the framework not only computes the energy yield of the individual cells and modules based on local and varying meteorological conditions, but also takes into account the double-sided illumination and the way it is influenced by module frames, system components’ geometry, and varying albedo. To enable implementation of advanced optical simulations (using ray-tracing) at system level, special care was also taken to optimize the computational flow: despite providing more detailed and accurate information, imec’s solution matches competitors in terms of speed.

Bifacial PV systems can annually generate 5 to 20 % more electricity than their traditional monofacial counterparts on little or no extra cost. Because of this benefit, bifacial PV installations are gaining market share. However, the limitations of the current simulation tools to precisely determine their expected energy yield could hinder further deployment.

While the existing commercial energy yield simulation tools and approaches used for the design of PV power plants have become more and more precise for standard monofacial silicon solar modules, their estimations for bifacial systems still include high error margins. Calculating the energy yield of bifacial solar modules is more challenging because energy generation from light received at the rear side depends on many variables that are hard to determine and may vary during the day, e.g. self-shading, plant geometry, mounting structure, ground albedo (= the percentage of sunlight reflected by the ground to the PV module’s rear side). Additionally, non-uniformity in rear illumination causes differing total energy generation at module level and consequently electrical mismatch losses at string level. This means that the string configuration also plays a role in the global solar power plant energy yield.

“The fact that we are working on a solution that can accurately predict the energy yield of both individual bifacial panels and entire systems is not only important from an R&D point of view, but we expect it will stimulate implementation of bifacial modules in the field, further reducing the price of green energy. Since current energy yield prediction tools for bifacial technology are not so precise, investors do not have a good view of their return on investment, making them hesitant to take the step. We are currently in the final validation phase of our simulation framework. Once it will be fully available it will give PV plant developers more confidence of the achievable bifacial gain, hence allowing easier funding of bifacial power plants,” says Philip Pieters, business development director at imec/EnergyVille.

“An important achievement is that our tool will be capable of calculating the energy yield of an entire system, while maintaining a low error margin of < 5% (daily RMSE) even in complex scenarios and at high speed of calculation. The impact of technological and system configuration details on the non-uniformity at the rear side of the modules has a surprisingly important effect and can trigger major losses up to 40% due to mismatch between modules, hence we pursue the further development of our simulations combining a physics-based approach with high performance computing techniques. Our final goal is to calculate with high precision the bifacial gain at module, string and system level and enable a multi-objective and automated PV power plant design tool on the longer-term.” says Eszter Voroshazi, R&D manager of PV modules and systems at imec/EnergyVille.

Imec’s new simulation framework has already been validated at module level at EnergyVille, a collaboration between the Flemish research institutes KU Leuven, VITO, imec and UHasselt in the field of sustainable energy and intelligent energy systems, and in collaboration with Kuwait University. Now the framework is ready to be validated on large scale installations in real-life conditions and in different climates across the world.

“As the grid is changing and renewable energy’s share in the global energy production is increasing fast, accurate estimations and simulations of energy yield will become ever more important,” says Philip Pieters, business development director at imec/EnergyVille.

About imec
Imec (imec-int.com) is a world-leading research and innovation hub in nanoelectronics and digital technologies. The combination of our widely acclaimed leadership in microchip technology and profound software and ICT expertise is what makes us unique. By leveraging our world-class infrastructure and local and global ecosystem of partners across a multitude of industries, we create groundbreaking innovation in application domains such as healthcare, smart cities and mobility, logistics and manufacturing, energy and education.

Imec is a partner in EnergyVille, a collaboration of the Flemish research centers KU Leuven, VITO, imec and UHasselt in the field of sustainable energy and intelligent energy systems, as well as in Solliance, a partnership of R&D organizations from the Netherlands, Belgium and Germany working in thin-film photovoltaic solar energy (TFPV).

As a trusted partner for companies, start-ups and universities we bring together more than 4,000 brilliant minds from over 85 nationalities. Imec is headquartered in Leuven, Belgium and has distributed R&D groups at a number of Flemish universities, in the Netherlands, Taiwan, USA, China, and offices in India and Japan. In 2017, imec's revenue (P&L) totaled 546 million euro.

Imec is a registered trademark for the activities of IMEC International (a legal entity set up under Belgian law as a "stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Flemish Government), imec the Netherlands (Stichting IMEC Nederland, part of Holst Centre which is supported by the Dutch Government), imec Taiwan (IMEC Taiwan Co.) and imec China (IMEC Microelectronics (Shanghai) Co. Ltd.) and imec India (Imec India Private Limited), imec Florida (IMEC USA nanoelectronics design center).
About EnergyVille

About EnergyVille
EnergyVille (energyville.be) is an association of the Flemish research institutes KU Leuven, VITO, imec and UHasselt in the field of sustainable energy and intelligent energy systems. Our researchers provide expertise to industry and public authorities on energy-efficient buildings and intelligent networks for a sustainable urban environment. This includes, for example, smart grids and advanced district heating and cooling.

One of the objectives of EnergyVille is to become one of the top five European institutes in innovative energy research. In this context, the center was embedded in major national and international networks right from the start. It covers research, development, training and innovative industrial activities under one name and in close collaboration with local, regional and international partners.

EnergyVille aims to be a driver in the Thor science park in Genk in the areas of research, business development and employment creation. The research center is supported by the city of Genk, the Flemish Government, The Province of Limburg, LRM, Nuhma, POM Limburg and the European structural funds.

 
 
 

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Imec and EnergyVille Present Unique Simulation Framework to Accurately Determine Energy Yield of Bifacial Solar Modules and Systems

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