To analyze the complex and unsteady aerodynamic flow associated with wind turbine functioning, computational fluid dynamics (CFD) is an attractive and powerful method. In this work, the influence of different numerical aspects on the accuracy of simulating a rotating wind turbine is studied. In...

Neutral boundary layer (NBL) flow fields, commonly used in turbine load studies and design, are generated using spectral procedures in stochastic simulation. For large utility-scale turbines, stable boundary layer (SBL) flow fields are of great interest because they are often accompanied by...

A power router has been recently developed for both AC and DC applications that has the potential for smart-grid applications. This study focuses on three-phase power switching through the development of an experimental setup which consists of a three-phase direct AC/AC matrix converter with a...

This paper presents an investigation of the transmitted power in a wireless power transfer system that employs a metamaterial. Metamaterials are a good means to transfer power wirelessly, as they are composed of multiple inductively-coupled resonators. The system can be designed and matched...

In this study, the particle formation and reduction characteristics at the engine-out position, after a three-way catalyst (TWC) and a metal foam gasoline particulate filter (GPF), were evaluated for a gasoline direct-injection (GDI) engine under part-load operating conditions. The vehicle tests...

We develop a dispatch and investment model to study the role of power storage and other flexibility options in a greenfield setting with high shares of renewables. The model captures multiple system values of power storage related to arbitrage, dispatchable capacity, and reserves. In a baseline...

We investigate carbon emission trends among EU Member States by testing the assumption of beta-type convergence for per capita CO2 emissions, conditional upon per capita output and energy use. We find that the emission growth/income relation is strictly negative, indicating that EU-15 countries...

Based on the benchmark solid oxide fuel cell (SOFC) dynamic model for power system studies and the analysis of the SOFC operating conditions, the nonlinear programming (NLP) optimization method was used to determine the maximum electrical efficiency of the grid-connected SOFC subject to the...

Sollte die umstrittene Fracking-Methode in Deutschland für eine kommerzielle Nutzung erlaubt werden? Martin Faulstich und Mechthild Baron, Sachverständigenrat für Umweltfragen, kommen zu dem Ergebnis, dass Fracking energiepolitisch nicht notwendig ist und keinen maßgeblichen Beitrag zur...

The following paper aims at analyzing the financing by the European Union of the climate change limitation and mitigation activities. The general objectives of the activities directed towards reducing and combating climate change, analyzed on the two directions of action, namely the mitigation...