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Losses in low-Reynolds-number centrifugal compressors
(Lappeenranta University of Technology, 2018)
Micro-scale centrifugal compressors and compressors operating at a high altitude suffer from performance deterioration due to low Reynolds numbers. An improvement in the efficiency of a low-Reynolds-number centrifugal ...
Mechanical Design Guidelines of an Electric Vehicle Powertrain
(Lappeenranta-Lahti University of Technology LUT, 2019-02-01)
The tendency of alternating fossil energy sources with state-of-the-art renewable energy resources is spreading in most contemporary fuel consuming applications, and transportation, as one of the essential human needs, is ...
Improving Transportation and Warehousing Efficiency with Simulation-Based Decision Support Systems
(Lappeenranta University of Technology, 2012-06-30)
Transportation and warehousing are large and growing sectors in the society, and their efficiency is of high importance. Transportation also has a large share of global carbondioxide emissions, which are one the leading ...
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 ...
Enhancing the efficiency of freight transport by using simulation
(Lappeenranta University of Technology, 2009-06-17)
The role of transport in the economy is twofold. As a sector of economic activity it contributes to a share of national income. On the other hand, improvements in transport infrastructure create room for accelerated economic ...
Productivity and Services – Safety Telephone Services for the Elderly
(Lappeenranta University of Technology, 2013-11-15)
Previous research on productivity is often associated with manufacturing or uses
manufacturing definitions of productivity. Marketing research on services has not been
satisfied with the manufacturing definitions. No ...
Energy efficient hydrogen production by water electrolysis
(Lappeenranta-Lahti University of Technology LUT, 2020-02-28)
Hydrogen is the most abundant element in the universe. On Earth, it not only forms water molecules, but also commonly combines with carbon into hydrocarbons that power the current world economy. The use of these natural ...
Novel virtual environment and real-time simulation based methods for improving life-cycle efficiency of non-road mobile machinery
(Lappeenranta University of Technology, 2015-04-01)
Virtual environments and real-time simulators (VERS) are becoming more and more
important tools in research and development (R&D) process of non-road mobile
machinery (NRMM). The virtual prototyping techniques enable ...
Analysis of theory and methodology used in determination of electric motor drive system losses and efficiency
(Lappeenranta-Lahti University of Technology LUT, 2021-04-23)
This research is divided into two main parts: loss determination of motors, converters, and motor drive systems and determination of measurement uncertainty. With its accurate measurements and data analysis, the work ...