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Energy-efficient control strategies for variable speed driven parallel pumping systems based on pump operation point monitoring with frequency converters
(Lappeenranta University of Technology, 2014-03-14)
The pumping processes requiring wide range of flow are often equipped with parallelconnected
centrifugal pumps. In parallel pumping systems, the use of variable speed
control allows that the required output for the process ...
Pulsed corona discharge for wastewater treatment and modification of organic materials
(Lappeenranta-Lahti University of Technology LUT, 2019-07-02)
Sustainable development is one of the most important questions in the contemporary world. Wastewater treatment and the search for renewable sources of organic products are essential, not only in the future but also for ...
Optimizing the specific energy consumption of vacuum filtration
(Lappeenranta-Lahti University of Technology LUT, 2019-12-13)
Vacuum filtration is applied in solid-liquid separation in a wide variety of industrial processes for instance in the mining, chemical, and paper industries. The main contributor to the considerable energy consumption of ...
Electric-drive-based control and electric energy regeneration in a hydraulic system
(Lappeenranta University of Technology, 2011-08-12)
Over the recent years, development in mobile working machines has concentrated on reducing emissions owing to the tightening rules and needs to improve energy utilization and reduce power losses. This study focuses on ...
Energy Efficiency Analyses of Hybrid Non-Road Mobile Machinery by Real-Time Virtual Prototyping
(Lappeenranta University of Technology, 2018-01-12)
Striving for energy efficiency and tightening emission regulations for diesel engines drive the non-road mobile machinery towards new driveline solutions, diesel-electric hybridization being one of them. Series hybridization ...
Energy Efficiency of a Diesel-Electric MobileWorking Machine
(Lappeenranta University of Technology, 2013-06-06)
The power demand of many mobile working machines such as mine loaders, straddle carriers
and harvesters varies significantly during operation, and typically, the average power
demand of a working machine is considerably ...
Tooth-Coil Permanent Magnet Synchronous Machine Design for Special Applications
(Lappeenranta University of Technology, 2013-10-24)
This doctoral thesis presents a study on the design of tooth-coil permanent magnet synchronous machines. The electromagnetic properties of concentrated non-overlapping winding permanent magnet synchronous machines, or ...
Induction Motor Drive Energy Efficiency - Simulation and Analysis
(Lappeenranta University of Technology, 2010-08-27)
A coupled system simulator, based on analytical circuit equations and a finite element method (FEM) model of the motor has been developed and it is used to analyse a frequency-converterfed industrial squirrel-cage induction ...
Variable speed drive in fan system monitoring
(Lappeenranta University of Technology, 2013-12-09)
Fan systems are responsible for approximately 10% of the electricity consumption in
industrial and municipal sectors, and it has been found that there is energy-saving
potential in these systems. To this end, variable ...