Search results for "42"
showing 10 items of 3911 documents
Investigation of a PV System Using a Mathematical Model and Available Data
2020
Master's thesis in Renewable energy (ENE500)
Measurement & Analysis of Labyrinth Leakage in Francis Turbines
2019
Master's thesis Renewable Energy ENE500 - University of Agder 2019 Thismaster’sthesisis discussing the potential of measured leakage water from Francis turbines in Brokkeand Holenpower plants. There is a leakage that represent a loss, coming from the labyrinth seals in the turbines’runners (crown and band side),and this leakage will increase over time.For this report theleakage from the upper labyrinth side (crown) has been measured.The leakage is different between the four Francis turbines at Brokke and between the three Francis turbines at Holen power station.Portaflow 220Bhas been used, whichis a flow instrument using ultrasonic sound. The measuring instrument was tested and verified bef…
System design for a solar powered thermal storage – to obtain reduction of demand side power peaks
2019
Master's thesis Renewable Energy ENE500 - University of Agder 2019 Demand side management is an efficiency tool to manage the consumption of energy. In this thesis a load controller is developedand used to store self-produced renewable energy as hot water in a domestic hot water heater. There are challenges associated with the grid,which is operating near max capacity. Instead of expandingthe grid and make huge investments to handle grid peak periods, the power consumption can be controlled and utilized better. To utilize all of the self-produced energy, an accontroller is installed and monitoredfrom a computer. A sensor for the temperature, a valve controllerand information about self-prod…
Evaluating The Performance Of Wind Farm Wake Models Using The Performance Data From A Land-Based Wind Farm
2020
Master's thesis in Renewable energy (ENE500)
Cost optimization of an offshore wind farm integrated to an oil & gas platform
2020
Master's thesis in Renewable energy (ENE500)
Fault Diagnosis of Gearbox Based Pitch Drives in Wind Turbines : Fault Detection by Support Vector Machine Using Motor Current Signal Analysis
2020
Master's thesis in Renewable energy (ENE500) The growing dependence on wind power in recent years has increased the demand for reliantwind turbines. The pitch system of a wind turbine is one of the components with the highest failure rates. The most common way of diagnosing pitch system faults is currently through vibration analysis, which requires the installation of vibration sensors. This thesis presents a non-intrusive method for fault detection of the planetary gearbox in an electric wind tur-bine pitch system. The method is based on using the three-phase motor currents from the induction motor of the pitch system to calculate a DC offset using Extended Park’s vector approach (EPVA). B…
Voltage Regulation Assessment in the Distributed Network with Wind Turbines and Photovoltaics Implemented
2019
Master's thesis Renewable Energy ENE500 - University of Agder 2019 High penetration of Distributed Generators (DGs) in the Distributed Network (DN) could cause undesirable operating conditions. The DN isby conventional means planned, andoperated in a passivemanner, i.e., the level of monitoring is low, and the power flow ispredicted in order to provide satisfactory power quality at the customer’s Point of Common Coupling (PCC). However, the implementation of DGs based on intermittent renewable energy sources, such as Photovoltaics (PV) or Wind Turbines (WT) stress the existing voltage regulation scheme in the DN. One of the objectives of the Distribution System Operators (DSO) is to provide…
DESIGN, MODELING, AND FABRICATION OF THERMOELECTRIC GENERATOR FOR WASTE HEAT RECOVERY IN LOCAL PROCESS INDUSTRY
2017
Master's thesis Renewable Energy ENE500 - University of Agder 2017 The waste heat from energy company consumption sectors, when rejected into atmosphere, are useless and it contributes to global warming. Nowadays industrial activities and energy sectors (power stations, oil refineries, coke ovens, etc.) are the most energy consuming sectors worldwide and, consequently, the responsible for the release of large quantities of industrial waste heat to the environment by means of hot exhaust gases, cooling media and heat lost from hot equipment surfaces and heated products. Recovering and reusing these waste heats would provide an attractive opportunity for a low-carbon and less costly energy re…
Intelligent estimation of the wake losses in wind farms : Artificial neural network estimation of the power of a wind farm considering the effect of …
2018
Master's thesis Renewable Energy ENE500 - University of Agder 2018 The transition from non-renewable to renewable energy production requires a detailed optimization and quantification of the generated power. The loss of power due to wake effect is a common problem for wind farms. The wake effect is the reduction of velocity and increase of turbulence in the wind flow downstream from a wind turbine. The wake effect is a complex multivariable phenomenon and its understanding iscapital forappropriate estimations of the power of a wind field and its turbines.This thesis builds an artificial neural network based on machine learning to model the performance of a single wind farm owned by WEICAN (…
System modeling and dispatch schedule optimization of combined PV battery system using linear optimization
2021
Master's thesis in Renewable energy (ENE500) Energy storage plays a vital role in paving the way for more renewable penetration. The technology is costly, but intelligent solutions regarding dispatch strategies and system design can help reduce the total cost over the projected lifetime of a system. For this thesis, a customizable linear programming algorithm is created within Python to optimize the battery energy scheduling based on generated PV power, electricity cost and load demand. The commercial system optimization tool HOMER is used to verify the code by running simulations based on historic data collected from Nord Pool and UiAs own photovoltaic system. One benefit of the custom mad…