Search results for "lek"
showing 10 items of 2808 documents
Photovoltaic facade systems in Norway: An assessment of energy performance, building integration, and costs
2018
Master's thesis Renewable Energy ENE500 - University of Agder 2018 In this master thesis, different PV facade systems located in Norway have been evaluated and analyzed. It will thus contribute to the ongoing development of a national database of BIPV. Also, technical and economic aspects of the PV systems are analyzed. Data series from the web-based monitoring systems have been evaluated, cross-sections of the PV facades are examined, and the economic costs associated with the PV systems have been evaluated. The specific yield and cost of the analyzed cases have been compared with simulated data and traditionally clothed facades and with each other. The results showed that the facade PV sy…
Simulating the thermal potential for energy storage in an electric water heater tank
2018
Master's thesis Renewable Energy ENE500 - University of Agder 2018 This thesis uses a CFD model of an electric water heater tank(EWHT) to investigate the strati cation in the tank during di erent discharge experiments. Strati cation in a tank happens naturally as hot water rises to the top and cold water sinks to the bottom, due to the di erence in density of the water based on the temperature. The simulation found that for higher discharges the strati cation becomes better and it is possible to extract more hot water from the tank than at lower discharges. Although the simulation built in this study can simulate all operations of the tank separately, it has not been successful to build a m…
Lifetime Based Health Indicator for Bearings using Convolitional Neural Networks
2019
Master's thesis Renewable Energy ENE500 - University of Agder 2019 Out of all the components in rotating electrical machinery, bearings have the highest failure rate. Bearingdegradation is a seemingly random process which is hard to both model and predict. Countless of con-dition based methods and algorithms have been proposed in order to accurately diagnose incipient faultsand estimate the remaining useful lifetime of bearings. These methods are often complex and hard to im-plement. In this thesis, a data-driven method of estimating a linear lifetime based health indicator (HI)using convolutional neural networks (CNNs) is proposed. The idea behind the method is to train a CNNmodel to recog…
Experimental investigation of the temperature coefficients of Vmpp and Impp in a silicon solar cell
2018
Master's thesis Renewable Energy ENE500 - University of Agder 2019 This thesis is meant to provide an experimental investigation of the temperature coefficient(b)of Vmpp compared to Voc in amulticrystallinesilicon solar cell.With the main question being: to what degree is the temperature coefficient equal for Voc and Vmpp and how does series losses(Rs)affect the two? Also investigating the same question for Isc and Impp. Three types of multicrystalline cells have been measured using a NeonSee AAA sun simulator, for a total of 18 tested cells all produced by Elkem SolarSilicon. I-V data wascollected using temperature scan, Suns-Voc and Isc-Voc measurements, with temperatures reflecting norma…
Design of an Air Management System for a Dry Room and Utilization of Waste Heat
2021
Master's thesis in Renewable energy (ENE500) This thesis presents the design of an air management system used in a dry room fora lithium-ion battery factory using a Matlab/Simulink environment. The sizing of the system is based on the 32 GWh battery factory, currently under construction by Morrow Batteries in Arendal, Norway. The generic air management system from the literature review was used as a base for the general layout and initial values. Combining coolers and a desiccant dehumidification wheel was the optimal solution for the dehumidification system. The molecular sieve was the selected desiccant due to its high performance at low relative humidity. The outlet air quality from the …
Power Prediction of Photovoltaic System using Neural Network Models
2019
Master's thesis Renewable Energy ENE500 - University of Agder 2019 This workconsidersa photovoltaic (PV)system installed on the rooftop of Agder Energi’s headquarters located at Kjøita, Kristiansand. The system includes three different types of solar PV modules; Suntech (multi-Si), Sharp (a-Si/μ-Si) and REC (multi-Si), that have a total installed DC capacity of 45 kWp. The system is grid-connected and instrumented for research and monitoring purposes.Artificial Neural Network(ANN)models were trained to obtain the lowest mean square error(MSE), by testing different configurations using a model-based trial and error approach. The modelconfigurations that gavethe lowest(MSE) wereused to predic…
Fornøyd med litt men ønsker seg likevel mer : gir nye versjoner av EPJ-system i helse- og omsorgssektoren i kommunene kontinuerlig forbedring?
2016
Masteroppgave i helse- og sosialinformatikk- Universitetet i Agder, 2016 Continuous development in health- and care services leads to the electronic patient record (EPR) systems to become more complex. It is important for municipalities to have systems that work, and acts as a support for workflows of everyday life, so that information regarding the patients are easily accessible and accurate. It is therefore important that new versions of EPR systems are delivered with good quality. This study focuses on municipalities' challenges with developing, testing and implementing new versions of old EPR system in health- and caregiving services. A qualitative study is conductet, with interviews of…
Alma Mater: 2012/ Ziema
2012
Profesionālās sporta leksiskas attīstība augstskolā
2016
Profesionālā leksika ir vissvarīgākais aspekts jebkuram speciālistam kādā noteiktā sfērā, īpaši profesionāliem, augsta līmeņa sportistiem, kuri ceļo un komunicē ar cilvēkiem no visas pasaules. Šī maģistra darba mērķis ir izpētīt sporta studentu profesionālās leksikas attīstības veidus ar komunikatīvo stratēģiju pielietojumu. Gadījuma izpēte ir izvēlēta kā pētījuma metode un tādi datu iegūšanas instrumenti kā aptaujas, novērošanas, intervijas un izmēģinājuma mācīšana atklāja, ka studenti ir ļoti atsaucīgi, lietojot komunikatīvo mācīšanas pieeju. Profesionālās leksikas attīstība ir visefektīvākā, ja tiek izmantoti komunikatīvi uzdevumi, kuri līdzinās reālām dzīves situācijām. Autentisku mater…