Sökning: "Hydro power"

Visar resultat 31 - 35 av 87 avhandlingar innehållade orden Hydro power.

  1. 31. Stochastic Modeling and Optimization under Uncertainty of a Hydro Power System

    Författare :Roger Halldin; Matematisk statistik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistik; actuarial mathematics; programming; operations research; Statistics; energy derivatives; multistage stochastic programs; electricity prices; principal component analysis; Scenario trees; inflow modeling; operationsanalys; programmering; aktuariematematik;

    Sammanfattning : Electricity bought and sold on the deregulated Nordic power market is dominated by hydro power. However, hydro power generation is restricted by the amount of water in reservoirs. The inflows to these reservoirs show a yearly cycle and seasonal planning of the production is necessary. Seasonal planning up to 1. LÄS MER

  3. 32. Short term scheduling of hydrothermal power systems with integer hydro constraints

    Författare :Olof Nilsson; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  4. 33. Hydraulic power steering in passenger cars : analysis, modeling and new functionality

    Författare :Marcus Rösth; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : THIS THESIS COVERS various aspects of hydraulic power assisted steering, HPAS, systems in road vehicles. Power steering is viewed as a dynamic system and is investigated with linear and non-linear modeling techniques. LÄS MER

  5. 34. Concrete as a multi-physical material with applications to hydro power facilities

    Författare :Tobias Gasch; Anders Ansell; Richard Malm; Erik Nordström; Mats Emborg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Civil and Architectural Engineering; Byggvetenskap;

    Sammanfattning : During its lifetime, a concrete structure is subjected to many different actions, ranging from mechanical loads to environmental actions. To accurately predict its integrity from casting and throughout its service life, a modelling strategy is required that considers mechanical loading but also implicitly accounts for physical effects such as temperature and moisture variations. LÄS MER

  7. 35. Sea Level Compensation System for Wave Energy Converters

    Författare :Valeria Castellucci; Rafael Waters; Ronan Costello; Uppsala universitet; []
    Nyckelord :Ocean energy; Tides; Linear generator; Point absorber; Offshore experiment; Hydro-mechanic modeling; Power absorption; Control system; Communication system; Measurement system; Lysekil research site; Wave Hub.;

    Sammanfattning : The wave energy converter developed at Uppsala University consists of a linear generator at the seabed driven by the motion of a buoy on the water surface. The energy absorbed by the generator is negatively affected by variations of the mean sea level caused by tides, changes in barometric pressure, strong winds, and storm surges. LÄS MER