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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 ...
Quantification of large steam bubble oscillations and chugging using image analysis
(Lappeenranta-Lahti University of Technology LUT, 2019-11-01)
The pressure suppression pool of a boiling water reactor as a safety system has vital importance from the nuclear reactor safety point of view. If a loss-of-coolant accident occurs, a large amount of steam is pushed through ...
Supercritical CO2 Numerical Modelling and Turbomachinery Design
(Lappeenranta-Lahti University of Technology LUT, 2019-04-16)
Supercritical CO2 Brayton cycles have attracted significant attention in recent years on the basis that they can achieve higher thermal efficiency at relatively lower turbine inlet temperature in comparison to conventional ...
Agent-Based Modeling as Part of Biomass Supply System Research
(Lappeenranta-Lahti University of Technology LUT, 2019-06-14)
Interest in the use of agent-based modeling (ABM) for studying biomass supply systems has increased because of its flexible and cost-efficient nature. While ABM has been around for a long time, recent developments in ...
Actors in Sustainability Transitions
(Lappeenranta-Lahti University of Technology LUT, 2019-04-26)
The world is experiencing serious sustainability challenges, such as climate change and the loss of biodiversity. To respond to these sustainability challenges, there is a need for societies throughout the world to make ...
Ferrite Permanent Magnet Hysteresis Loss in Rotating Electrical Machinery
(Lappeenranta-Lahti University of Technology LUT, 2019-11-15)
Electrical machines with permanent magnets (PMs) find numerous applications in present energy-efficient technologies. A reasonable compromise in terms of costs and efficiency makes electrical machines with ferrite PMs a ...