Publications de Laure-Emmanuelle Perret Aebi

Reinforcement Learning for Joint Design and Control of Battery-PV Systems

Christophe Ballif, Nicolas Würsch, Laure-Emmanuelle Perret Aebi, Marine Dominique Cauz

The decentralisation and unpredictability of new renewable energy sources require rethinking our energy system. Data-driven approaches, such as reinforcement learning (RL), have emerged as new control strategies for operating these systems, but they have n ...

2023

A 3D indicator for guiding AI applications in the energy sector

Christophe Ballif, Christian Rod, Nicolas Würsch, Laure-Emmanuelle Perret Aebi, Alessandro Francesco Aldo Virtuani, Hugo James André Quest, Marine Dominique Cauz, Fabian Heymann

The utilisation of Artificial Intelligence (AI) applications in the energy sector is gaining momentum, with increasingly intensive search for suitable, high-quality and trustworthy solutions that displayed promising results in research. The growing interes ...

2022

Benefits of a Diversified Energy Mix for Islanded Systems

Christophe Ballif, Christian Rod, Lionel Benjamin Bloch, Nicolas Würsch, Laure-Emmanuelle Perret Aebi, Marine Dominique Cauz

Achieving energy self-sufficiency is a major challenge for remote areas, especially islands. Various technologies have recently been developed to exploit renewable resources in such areas in order to reduce dependency on fossil fuels. This work focuses on ...

2020

Thermo-mechanical stability of lightweight glass-free photovoltaic modules based on a composite substrate

Christophe Ballif, Valentin Chapuis, Hengyu Li, Laure-Emmanuelle Perret Aebi, Ana Cristina Oliveira Martins, Alessandro Francesco Aldo Virtuani

Lightweight PV modules are attractive for building-integrated photovoltaic (BIPV) applications, especially for renovated buildings, where the additional load bearing capacity is limited. This work focuses on the development of a lightweight, glass-free pho ...

ELSEVIER SCIENCE BV2018

Integrated thinking for photovoltaics in buildings

Christophe Ballif, Emmanuel Rey, Sophie Lufkin, Laure-Emmanuelle Perret Aebi

Recent developments in photovoltaic technologies enable stimulating architectural integration into building façades and rooftops. Upcoming policies and a better coordination of all stakeholders will transform how we approach building-integrated photovoltai ...

2018

Modeling potential-induced degradation (PID) in crystalline silicon solar cells: from acceleratea-aging laboratory testing to outdoor prediction

Christophe Ballif, Fanny Sculati-Meillaud, Federico Paolo Galliano, Hengyu Li, Laure-Emmanuelle Perret Aebi, Eleonora Annigoni, Marko Jankovec, Alessandro Francesco Aldo Virtuani

We present a mathematical model to predict the effect of potential-induced degradation (PID) on the power output of c-Si modules in different climates. For the experimental part, we manufacture mini-modules made of two c-Si p-type cells, and use accelerate ...

2016

In-Situ Monitoring of Moisture Ingress in PV Modules Using Digital Humidity Sensors

Christophe Ballif, Fanny Sculati-Meillaud, Federico Paolo Galliano, Hengyu Li, Laure-Emmanuelle Perret Aebi, Eleonora Annigoni, Marko Jankovec

A new in-situ moisture monitoring technique for photovoltaic (PV) modules is proposed using miniature digital humidity and temperature sensors. The sensors were embedded in three different ethylene-vinyl-acetate (EVA) stacks and proved to be resistant to l ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Solar module and its production process

Aïcha Hessler-Wyser, Nicolas Würsch, Laure-Emmanuelle Perret Aebi

The present invention relates to a solar module comprising a front sheet, a transparent solar cell and a structured reflecting layer comprising color patterned portions. The solar cell has a transparency of at least 5%, preferably at least 10%, more prefer ...

2016

Fast and non-destructive detection on the EVA gel content in photovoltaic modules by optical reflection

Christophe Ballif, Hengyu Li, Laure-Emmanuelle Perret Aebi

Poly(ethylene-co-vinyl acetate) (EVA) has been the dominating material in the photovoltaic (PV) encapsulant market for decades, owing to its superior cost-performance balance. To achieve its desired material properties, EVA undergoes a curing reaction duri ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Effect of Cooling Press on the Optical Transmission through Photovoltaic Encapsulants

Christophe Ballif, Yun Luo, Hengyu Li, Laure-Emmanuelle Perret Aebi

In certain laminators for poly (ethylene-co-vinyl acetate) (EVA) encapsulation process of photovoltaic modules, cooling press (CP) is applied to the module after encapsulation. Here, the effect of CP on the optical transmission through common PV encapsulan ...

Taylor & Francis Inc2015

Solar module and its production process

Christophe Ballif, Matthieu Despeisse, Laure-Emmanuelle Perret Aebi, Patrick Heinstein

The present invention relates to a solar module comprising a front sheet (30), an amorphous silicon photoelectric device (32) comprising at least a transparent front electrode layer (34), a p-type doped silicon layer (36), an intrinsic silicon layer (38), ...

2015

The effect of cooling press on the encapsulation properties of crystalline photovoltaic modules: residual stress and adhesion

Christophe Ballif, Yun Luo, Valentin Chapuis, Hengyu Li, Laure-Emmanuelle Perret Aebi

A high-quality encapsulation process is crucial to ensuring the performance and long-term reliability of photovoltaic (PV) modules. In crystalline Si technology-based modules, poly (ethylene-co-vinyl acetate) (EVA) is the most widely used PV encapsulant. I ...

Wiley-Blackwell2015

The influence of centrality on the global energy consumption in Swiss neighborhoods

Emmanuel Rey, Sophie Lufkin, Laure-Emmanuelle Perret Aebi

The objective of this research is to compare the energy consumption of seven recently built residential neighborhoods in the urban region of Neuchâtel, Switzerland, in order to identify the influence of centrality on total energy spending. Primary energy i ...

Elsevier2013

Optical transmission as a fast and non-destructive tool for determination of ethylene-co-vinyl acetate curing state in photovoltaic modules

Christophe Ballif, Yun Luo, Hengyu Li, Laure-Emmanuelle Perret Aebi

Poly(ethylene-co-vinyl acetate) (EVA) is the primary polymer used for encapsulation of photovoltaic (PV) modules. Its degree of cross-linking (gel content) is taken as a major quality reference. The EVA gel content is normally measured by Soxhlet extractio ...

2013

Compressive-shear adhesion characterization of polyvinyl-butyral and ethylene-vinyl acetate at different curing times before and after exposure to damp-heat conditions

Christophe Ballif, Valentin Chapuis, Hengyu Li, Laure-Emmanuelle Perret Aebi

Photovoltaic (PV) module efficiency and reliability are two factors that have an important impact on the final cost of the PV electricity production. It is widely accepted that a good adhesion between the encapsulant and the different substrates of a PV mo ...

Wiley-Blackwell2012

Insights into the encapsulation process of photovoltaic modules: GC-MS analysis on the curing step of Poly (ethylene-co-vinyl acetate) (EVA) encapsulant

Christophe Ballif, Yun Luo, Hengyu Li, Laure-Emmanuelle Perret Aebi

Appropriate encapsulation schemes are essential in protecting the active components of the photovoltaic (PV) module against weathering and to ensure long term reliability. For crystalline cells, Poly (ethylene-co-vinyl acetate) (EVA) is the most commonly u ...

Ismithers2012

Monitoring water vapour penetration using a contactless technique

Christophe Ballif, Mustapha Benkhaira, Laure-Emmanuelle Perret Aebi

Some layers of thin film photovoltaic modules maybe critically sensitive to moisture. In this study we present a new tool for monitoring the effect of moisture using a particular Transparent Conductive Oxide (TCO) as a sensor. The moisture content of the e ...

2009