Search for dissertations about: "Refurbishment"

Showing result 16 - 20 of 41 swedish dissertations containing the word Refurbishment.

  2. 16. Extension of the Pressure Time Method to 3-Dimensional Flows

    Author : Mehrdad Kalantar Neyestanaki; Michel Cervantes; Pontus Jonsson; Georgiana Dunca; Thomas Staubli; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Abstract : Hydropower has stood as a clean and sustainable energy source since the late 19th century. Many turbines were built 50 to 70 years ago and require refurbishment. It is important to assess the efficiency of turbines before and after refurbishment to meet performance guarantees .However, the flow rate makes such estimation challenging. READ MORE

  4. 17. An experimental and numerical investigation of a Kaplan turbine model

    Author : Berhanu Mulu; Sebastian Muntean; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Abstract : Hydropower is a renewable, reliable and highly efficient source of energy. Hydropower has the ability to run as a base load and to adjust load rapidly. This makes hydropower suitable for coupling with other renewable energy sources to stabilize frequency fluctuations. READ MORE

  5. 18. Flow and pressure measurements in low-head hydraulic turbines

    Author : Pontus Jonsson; Ahmad Nourbakhsh; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Abstract : Hydropower is a clean and sustainable energy resource that has been developed and used since the late 19th century. In Sweden, power plants have been constructed over the entire 20th century, with a peak in the period of 1950-1970. Currently, many of the older plants are in need of refurbishment. READ MORE

  6. 19. Development of the pressure-time method: final integration point and head losses

    Author : Mehrdad Kalantar Neyestanaki; Michel Cervantes; Jonathan Nicolle; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Pressure-time method; head loss calculation; endpoint determination; Strömningslära; Fluid Mechanics;

    Abstract : Hydropower is an efficient renewable energy source able to regulate electrical grid fluctuations. However, many hydropower plants were built decades ago, and now it is the time for a major refurbishment. The turbine's efficiency is essential and needs to be determined before and after refurbishment. READ MORE

  7. 20. Experimental and numerical investigation of axial turbine models

    Author : Berhanu Mulu; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Abstract : Hydropower is a versatile renewable source of power generation able to change rapidly operating conditions. Hydropower plants may today work over a larger operating range than designed for due to the introduction of renewable sources of energy and the deregulation of the electricity market. READ MORE