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LCL Filter Designs for Parallel-Connected Grid Inverters
(Lappeenranta University of Technology, 2018-12-04)
Power generation has become more dispersed as a result of the increasing popularity of the renewable energy sources, which interface with the utility grid with power electronic converters. Higher power levels can be achieved ...
Dynamic analysis of flexible multibody systems using finite elements based on the absolute nodal coordinate formulation
(Lappeenranta University of Technology, 2018-10-19)
The computational analysis of mechanical systems has a wide array of applications and is therefore essential in many fields of modern industry. This dissertation studies the simulation of mechanical systems using the ...
Transition towards long-term sustainability of the Finnish energy system
(Lappeenranta University of Technology, 2018-11-01)
This dissertation describes the meaning, potential elements and impact of a transition towards the long-term sustainability of the Finnish energy system. Such a transition is possible that would adhere to the goals of the ...
Dynamic analysis of rotating systems including contact and thermal-induced effects
(Lappeenranta University of Technology, 2018-10-16)
Rotor dynamics is a special field of structural dynamics focusing on the study and analysis of rotating structures. Practical applications for rotor dynamics are found in typical industrial rotating electrical machine ...
Identifying needs and ways to integrate sustainability into energy degree programmes
(Lappeenranta University of Technology, 2018-12-07)
This dissertation focuses on the changes needed in energy education in order to integrate sustainability into the courses of energy degree programmes at technical universities. Education is an important driver of and energy ...
Recognizing required changes to higher education engineering programs’ information literacy education as a consequence of research problems becoming more complex
(Lappeenranta University of Technology, 2018)
Challenges in the Earth’s sustainable development set requirements to modern engineering education. Engineers face complex problems, which need to be solved to keep the planet viable for future generations. This study was ...
Dependence of manufacturing parameters on the performance quality of welded joints made of direct quenched ultra-high-strength steel
(Lappeenranta University of Technology, 2018-09-29)
The use of ultra-high-strength steels (UHSS) has increased in the engineering industry during past decades especially in the fields of welded structural applications where products are required to possess a specific ...
An experimental and theoretical investigation of power losses in planetary gearboxes
(Lappeenranta University of Technology, 2018-10-12)
Gearboxes based on planetary gear sets are preferred for their advantages, such
as higher gear ratios, improved self-centering capabilities, kinematic flexibility,
favorable bearing support conditions and higher power ...
Improving the environmental safety of ash from bioenergy production plants
(Lappeenranta University of Technology, 2018-12-14)
Each year, energy production plants in Eastern Finland produce just under 100,000 tonnes of different types of ash and slag in the process of energy production. The utilisation of energy production ash flows has made ...
Active residential customer in a flexible energy system — a methodology to determine the customer behaviour in a multi-objective environment
(Lappeenranta University of Technology, 2018-12-05)
The transformation from passive into active end customers in modern energy systems has already started in many European countries, and it is a long process. The first step to engage residential customers to be active actors ...