Suchergebnisse

Regenerativer Energien wie Luft-Wasser-Wärmepumpen genießen durch den Fokus auf den Klimaschutz eine hohe Akzeptanz. Mit dem Klimapaket der Bundesregierung ist seit Anfang des Jahres 2020 die Attraktivität des Einbaus dieser Wärmeerzeuger gestiegen, da die Investitionskosten zum Großteil erstattet werden. Luft-Wasser-Wärmepumpen arbeiten jedoch nicht völlig geräuschlos und je dichter die Bebauung, desto eher können die Nachbarn sich durch Lärmbelästigung gestört fühlen. Dabei ist keineswegs nur der messbare Schalldruckpegel ausschlaggebend, sondern das menschliche Geräuschempfinden und hier kommt die Psychoakustik mit ihren Untersuchungsmethoden ins Spiel. Bei der Planung kommt auch die TA Lärm ins Spiel. Der Bewohner wird dann zugleich Betreiber.

This study analyzes the treatment effects of public training programs for the unemployed in Germany. Based on propensity score matching methods we extend the picture that has been sketched in previous studies by estimating treatment effects of medium-term programs for different sub-groups with respect to vocational education and age. Our results indicate that program participation has a positive impact on employment probabilities for all sub-groups. Participants also seem to find more often higher paid jobs than non-participants. However, we find only little evidence for the presence of heterogeneous treatment effects, and the magnitude of the differences is quite small. Our results are thus - at least in part - conflicting with the strategy to increasingly provide training to individuals with better employment prospects.

This study analyzes the treatment effects of public training programs for the unemployed in Germany. Based on propensity score matching methods we extend the picture that has been sketched in previous studies by estimating treatment effects of medium-term programs for different sub-groups with respect to vocational education and age. Our results indicate that program participation has a positive impact on employment probabilities for all sub-groups. Participants also seem to find more often higher paid jobs than non-participants. However, we find only little evidence for the presence of heterogeneous treatment effects, and the magnitude of the differences is quite small. Our results are thus at least in part conflicting with the strategy to increasingly provide training to individuals with better employment prospects.

The authors would like to thank Niels N. Sørensen from DTU for providing the CFD simulations. This project has received partly funding from the European Union 7th framework program for research, technological development and demonstration under the grant agreement No FP7- ENERGY-2013-1/no 608396 (AVATAR project). This work has also partly supported by the Energy Technology Development and Demonstration Program (EUDP-2014, J. nr. 64014-0543) under the Danish Energy Agency. ; This work presents an investigation on different methods for the calculation of the angle of attack and the underlying induced velocity on wind turbine blades using data obtained from three dimensional computational fluid dynamics. Several methods were examined and their advantages as well as shortcomings were presented. The investigations were performed for flows past two 10MW reference wind turbines under axial inflow conditions, namely the 10MW turbines designed in the EU AVATAR and INNWIND.EU projects. The results shown that the evaluated methods are in good agreement with each other at the mid-span, though some deviations were observed at the root and tip regions of the blades. Using any of the proposed methods, it is possible to obtain airfoil characteristics for lift and drag coefficients as a function of the angle of attack. Furthermore, by using the extracted data new correction models can be derived for blade element momentum calculations. ; non peer-reviewed