Essays about: "runner blades"

Showing result 1 - 5 of 6 essays containing the words runner blades.

1. 1. Investigation of Variable Speed Technology when Converting Hydropower Kaplan Turbines into Fixed Propeller Turbines

   University essay from Uppsala universitet/Institutionen för fysik och astronomi

   Author : Johannes Ansved; [2022]
   Keywords : hydropower; variable speed; kaplan; turbines; model; simulation;

   Abstract : With an evolving energy system, an increased flexibility is necessary, placing additional demand on hydropower plants. New technology, in particular full size frequency converters (FSFC) and doubly fed induction machines (DFIM), allows hydropower turbines to run at different speeds than originally designed, thus making the turbine more flexible. READ MORE

3. 2. Developement of a numeric tool for fatigue life evaluation of the regulating mechanism in Kaplan runners

   University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Author : Emil Treitler; [2022]
   Keywords : Fatigue; Kaplan; Hydropower; Turbine;

   Abstract : Kaplan turbines are a type of hydropower turbine with adjustable runner blades. This allows the turbine to alter its power output while maintaining a relatively high efficiency over a wide range of power levels. But these frequent blade angel adjustments exposes the turbines internal mechanism to wear and the possibility of fatigue failure. READ MORE

4. 3. Optimization of Kaplan turbines for frequency regulation in hybrid hydropower plants

   University essay from Uppsala universitet/Institutionen för elektroteknik

   Author : Nayan Narkhede; [2022]
   Keywords : Kaplan; Kaplan turbines; frequency regulation; hybrid hydropower plants; wear and tear; guide vanes; runner blades;

   Abstract : The increasing penetration of variable renewable energy sources in the Nordic Power System is causing frequency quality degradation and has increased the importance of primary frequency control provided by hydropower plants. Hydropower is the world’s largest renewable energy source. READ MORE

5. 4. Preliminary simulation of Porjus U9 turbine at speed no load

   University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Author : Henrik Holmström; [2019]
   Keywords : Kaplan; Speed no-load; SNL;

   Abstract : Hydropower plants are shifting towards operating at off-designed conditions, meaning that the number of start-stop cycles and maintenance time due to cavitation increases. The speed no-load condition is the moment before magnetization of the generator, i.e., no load, low flow, constant runner rotational speed, guide vane and runner blade angle. READ MORE

6. 5. A fatigue investigation in a Kaplan hydropower station operated in frequency regulating mode

   University essay from KTH/Energiteknik

   Author : Aron Tapper; [2016]
   Keywords : ;

   Abstract : Due to the increase of intermittent power in the Nordic grid the need for frequency regulation increases. Hydropower has the ability to respond fast to frequency changes in the grid and is the power source mainly used to regulate the frequency in the Nordic grid. READ MORE