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Variable-speed-drive-based monitoring and diagnostic methods for pump, compressor, and fan systems
(Lappeenranta-Lahti University of Technology LUT, 2021-02-05)
Pumps, fans, and compressors account for nearly a third of the global consumption of electricity. Variable-speed drives (VSD) enable energy-efficient capacity control of these devices, and have thus become a common component ...
Energy security evaluation for the present and the future on a global level
(Lappeenranta-Lahti University of Technology LUT, 2020-10-13)
Energy Security is a universal concern for all stakeholders and achieving energy security is a crucial objective for all societies. Therefore, energy security became a major part of national security with the ability to ...
Submersible permanent-magnet synchronous machine with a stainless core and unequal teeth widths
(Lappeenranta-Lahti University of Technology LUT, 2021-06-30)
In recent years, permanent magnet synchronous machines (PMSM) have gained popularity owing to their excellent performance compared with other kinds of electrical machines in numerous applications. Furthermore, advances in ...
In situ hydrogen production in power-to-food applications
(Lappeenranta-Lahti University of Technology LUT, 2022-02-04)
Technologies capable of coupling sustainable generation of energy and production of valuable products are required to shift the focus from a fossil economy to a renewablebased and circular economy and to confront environmental ...
Evaluation of open-source FEM software performance in analysing converter-fed induction machine losses
(Lappeenranta-Lahti University of Technology LUT, 2022-01-28)
Converter-fed induction machines are widely used in variable speed applications. They are renowned for their good controllability, low manufacturing cost, and robustness. These machines are used in various applications ...
Power-based electricity distribution tariffs providing an incentive to enhance the capacity effectiveness of electricity distribution grids
(Lappeenranta-Lahti University of Technology LUT, 2022-02-11)
Energy transition is reshaping the electricity sector at a fast pace. As a consequence, electricity distribution systems are facing profound changes because also customer loads are undergoing a significant development. In ...
Socioeconomic impacts of cost optimised and climate compliant energy transitions across the world
(Lappeenranta-Lahti University of Technology LUT, 2022-06-17)
There are undeniable signs from all over the world demonstrating that climate change is already upon us. Numerous scientific studies have warned of dire consequences should humankind fail to keep average global temperatures ...
Technology analysis of magnetically supported rotors applied to a centrifugal compressor of a high-temperature heat pump
(Lappeenranta-Lahti University of Technology LUT, 2022-05-13)
Despite decades of development of high-speed motors, challenges and limitations concerning high-speed powertrains and motors in industrial applications remain. Improved reliability and a smaller footprint together with ...
Control design issues in grid-connected single -phase converters, with the focus on power factor correction
(Lappeenranta-Lahti University of Technology LUT, 2020-09-25)
Electrical equipment is most commonly powered from a mains connection. The mains alternating voltage is rectified, isolated, and regulated in a power supply. The power supply acts as an interface between the mains voltage ...
In-depth analysis of the global power infrastructure—Opportunities for sustainable evolution of the power sector
(Lappeenranta-Lahti University of Technology LUT, 2020-11-27)
Over the decades, the power sector has continuously evolved, and the strategy used to provide its service has changed dramatically over time and continues to do so. Therefore, it is of paramount importance to analyse in ...