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On adaptive intelligent welding: technique feasibility in weld quality assurance for advanced steels
(Lappeenranta University of Technology, 2018-08-28)
The welding industry has a need to utilize lightweight steels in welded applications while maintaining acceptable weld quality. This goal can be achieved through effective quality assurance, efficient weld parameter ...
International trade in biomass for energy production: The local and global context
(Lappeenranta University of Technology, 2018-08-31)
Biomass is an important source of renewable energy in the global energy mix. International trade in biomass is increasing. It is stimulating global use of biomass for energy and promoting development of bioenergy in many ...
The role of renewable energy based seawater reverse osmosis (SWRO) in meeting the global water challenges in the decades to come
(Lappeenranta-Lahti University of Technology LUT, 2020-11-25)
Renewable energy (RE) powered desalination is rapidly gaining interest as a means to augment the increasingly stressed global water supply. This thesis introduces and describes the ways in which 100% RE-based seawater ...
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 ...
Improved state observers and robust controllers for non-linear systems with special emphasis on robotic manipulators and electro-hydraulic servo systems
(Lappeenranta-Lahti University of Technology LUT, 2021-02-26)
In real world the motion control system are faced with two major problems.: 1) monitoring internal states of the system 2) generating the suitable control signal to reach a desired path and follow it with time. These ...
Synthesis and optimization of Kraft process evaporator plants
(Lappeenranta-Lahti University of Technology LUT, 2021-03-09)
In this dissertation, a novel methodology based on process superstructures for the synthesis and optimization of multiple-effect evaporation systems is described. The methodology allows for the structure and heat transfer ...
Ecodesign of Construction and Demolition Waste-Derived Thermoplastic Composites
(Lappeenranta-Lahti University of Technology LUT, 2020-12-12)
The use of recycled materials in composites has been studied since the 1990s. Research has traditionally focused on technical properties, as well as the recyclability of materials. How these composites should be used or ...
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 ...
Fluidized bed combustion and humidified gas turbines as thermal energy conversion processes of the future
(Lappeenranta-Lahti University of Technology LUT, 2020-12-14)
Growing awareness of environmental issues related to heat and electrical energy production has led to sustained research efforts to find ways to reduce fossil energy consumption and increase renewable energy usage. Future ...
Real-Time Efficient Computational Approaches for Hydraulic Components and Particulate Energy Systems
(Lappeenranta-Lahti University of Technology LUT, 2020-12-11)
The so-called fourth industrial revolution requires high-speed data transmission and application of real-time computation to the phenomena. These two technologies highlight the potential of the digital-twin concept for ...