Publicaties

An alternative energy source that has appeared beyond expectations and has seen a lot of progress is the fuel cell. A proton exchange membrane (PEM) fuel cell is chosen for analysis and requires a DC-DC boost converter as an interface between the fuel cell and the load to provide a high-gain regulated voltage. Although great effort towards developing different converter topologies has been made during recent decades, less attention has been ...

Perovskite materials have gathered increased interest over the last decade. Their rapidly rising efficiency, coupled with the compatibility with solution processing and thin film technology has put perovskite solar cells (PSC) on the spotlight of photovoltaic research. On top of that, band gap tunability via composition changes makes them a perfect candidate for tandem applications, allowing for further harvest of the solar irradiation spectrum ...

Finesse coefficient is one of the most important parameters describing the properties of a resonant cavity. In this research, a mathematical investigation of the application of diamond structures in a fiber-optic Fabry-Perot measurement head to assess their impact on the finesse coefficient is proposed. We present modeled transmission functions of cavities utilizing a nitrogen-doped diamond, a boron-doped diamond, nanocrystalline diamond sheet ...

This paper examines the impact of various packaging materials on the IGBT module's thermal characteristics. A 3D finite element method (FEM) model of the studied IGBT module is created and validated by experimental tests. The materials used in the baseplate and the insulation layer of the IGBT module are then replaced with various materials to investigate how different material combinations affect the thermal performance. The ob-tained thermal ...

Co-free Li-rich layered oxides are gaining interest as feasible positiveelectrode materials in lithium-ion batteries (LIBs) in terms of energy density, costreduction, and alleviating safety concerns. Unfortunately, their commercialization ishindered by severe structural degradation that occurs during electrochemical operation.The study at hand demonstrates advanced structural engineering of a Li-rich Co-freeoxide with composition ...

The reliability of grid-tied PV inverters without integrated battery is compared with AC/DC-coupled PV- battery systems while varying the time resolution of the load and mission profiles (1 min – 60 min). Adding a battery increases self-consumption and can lower the needed grid power capacity in both DC- and AC-coupled configurations. A comparison between a battery-free PV system and a grid-tied PV-battery system shows that adding a battery to ...

This paper presents a flexible framework to evaluate the reliability of power electronic systems used within a grid-connected PV-battery system. As a practical example to show the capability of this framework, the life consumption (LC) of power semiconductors (IGBTs and diodes) is determined considering both solar panel and lithium-ion battery degradation. Different panel degradation rates can be defined to the framework. The battery degradation ...

This paper proposes a grey box model for cell-level simulation of potential induced degradation of the shunting type (PID-s) by extending a physics-based energy yield simulation framework. The leakage current is first computed using a physics-based approach based on an equivalent frame-to-cell electric circuit composed of temperature and humidity dependent resistances. Then, the increase of PID-s degradation due to leakage current is retrieved ...

Building-Integrated Photovoltaics is a key technology for the generation of renewable energy in the built environment , especially in case of high-rise buildings. A promising solution to reduce costs associated with the on-site electrical installation, is the factory pre-installment of a module-level converter and the electrical interconnection between the modules. An alternative for regular cabling in BIPV systems, is the use of laminated bus ...

This paper examines the practical challenges of simplified setups aimed at achieving high-power IGBTs' I-C-V-CE curve. The slope of this I-V curve (which is defined as on-resistance R-CE) and the point where the V-CE-V-GE curve visibly bends (threshold gate voltage) can be suitable failure precursor parameters to determine an IGBT's health condition. A simplified/affordable design for these specific measurements can be used for in-situ condition ...