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Mitigating noncirculating bearing currents by a correct stator magnetic circuit and winding design
Different mechanisms by which bearing currents flow inside the electrical machine are well studied. In contrast, investigation and development of different techniques to mitigate these currents remain a field for improvement, ...
Containing Future Epidemics with Trustworthy Federated Systems for Ubiquitous Warning and Response
In this paper, we propose a global digital platform to avoid and combat epidemics. It leverages the pervasiveness of wireless connectivity while being trustworthy and secure. The proposed system is conceptualized to be ...
Effect of non-ideally manufactured riblets on airfoil and wind turbine performance
Riblets are a passive flow control method, which can be used for drag reduction, especially with small wind turbines that have a low Reynolds number. Riblet manufacturing, however, is a challenging task and the required ...
Power quality and reactive power of water electrolyzers supplied with thyristor converters
Industrial water electrolyzers apply direct current in kiloampere ranges. Therefore, rectifiers are typically based on thyristors despite the high amplitude current fluctuation excited by the rectifier. This paper studies ...
Current energy policies and possible transition scenarios adopting renewable energy: A case study for Bangladesh
This study analyses energy transition pathways for the case of Bangladesh. The LUT Energy System Transition model, a high temporal - spatial resolution linear optimisation tool, is used to model an energy system transition ...
Environmental impacts of manure management based on life cycle assessment approach
Horse manure is often a cost for horse owners, and in most cases, it is underutilized when its status as biodegradable waste means that it could potentially be used in renewable energy production and serve as a source of ...
The role of efficient forest biomass logistics on optimisation of environmental sustainability of bioenergy
(Lappeenranta-Lahti University of Technology LUT, 2020-06-17)
Forest biomass is a crucial element in the energy system in many parts of the world, especially in Finland, and it is expected to play a similar, if not a more important, role in the near future as countries aim to replace ...
Identification of magnetically levitated machines
(Lappeenranta-Lahti University of Technology LUT, 2020-06-16)
Magnetically levitated machines use magnetic levitation to maintain the separation between the bearing races. They offer various benefits compared with other types of bearings: no contact between the bearing races, the ...
(Springer, Cham, 2020-05-13)
A carbon handprint is a new approach developed to quantify the positive climate impact of products and services. In contrast to carbon footprint, which refers to negative global warming potential as a consequence of ...