Search results for "wind"

Techno-economic pre-feasibility study of wind and solar electricity generating systems for households in Central Finland

2014

The objective of this work is to investigate the viability of a wind, PV or hybrid wind-PV system supplemented with battery storage for electricity production to meet the electricity consumption of a typical household apartment in Central Finland. The assessment criteria for the analysis were cost of energy and total net present cost of each system configuration. We selected the Hybrid Optimization Model for Electric Renewables (HOMER) software, RETScreen, and PVsyst in our analysis and finally only HOMER was considered for performing system optimization analysis because of the creditability of its results. A PV-battery system is recognized as the most economically feasible option in our si…

Miten tuulivoimaloiden rakentaminen vaikuttaa paikallisten tuulivoima-asenteisiin? : esimerkkinä Luhangan Latamäki

2015

Energiantuotantoa fossiilisilla polttoaineilla pyritään korvaamaan uusiutuvalla energialla ilmastonmuutoksen hillitsemiseksi. EU:n ja valtion tasolla asetettuihin päästövähennys-tavoitteisiin päästäkseen Suomi pyrkii muiden keinojen ohella lisäämään tuulivoimalla tuotetun sähkön määrää tuntuvasti. Tuulivoimatuotannon negatiiviset ympäristövaikutukset ovat paikallisia, minkä vuoksi paikallistason suhtautuminen tuulivoimaa ja tuulivoima-puistoja kohtaan on merkittävässä roolissa tuulivoimapuistohankkeiden etenemisen vauhdittamisessa tai hidastamisessa. Luhangan Latamäkeen rakennettiin Keski-Suomen ensimmäinen kuuden 3 MW turbiinin tuulivoimapuisto vuonna 2014. Paikallisten suhtautumista tuuli…

Application of artificial neural network and genetic algorithm to forecasting of wind power output

2007

Demonstrating measure-correlate-predict algorithms for estimation of wind resources in central Finland

2010

In this study, measure-correlate-predict (MCP) algorithms - Simple Linear Regression and Variance Ratio Methods - for predicting wind speed were studied. The MCP algorithms were successfully used to predict missing wind speeds at two sites in Jyväskylä and Viitasaari, respectively. These two algorithms used data from one of the site to predict missing wind speed data at the other site. The results obtained using the MCP methods were compared using metrics that showed the characteristics of the predicted data to be unbiased compared to measured data. From the data of this study, we also evaluated wind power density at both sites which categorized the local wind resources as poor since the de…

Atskaišu sistēma pašnodarbinātām personām

2022

Kvalifikācijas darba ietvaros ir izstrādāta un aprakstīta tīmekļa lietotne atskaišu veikšanai pašnodarbinātām personām. Sistēma izstrādāta, izmantojot PHP programmēšanas valodas satvaru Laravel un JavaScript programmēšanas valodas satvaru Vue.js. Lietotne ļauj lietotājiem veidot klientu profilus, glabāt informāciju par paveiktajām darbībām un pēc lietotāja izvēlētajiem kritērijiem skatīt kopsavilkumu diagrammas veidā. Tīmekļa lietotnes galvenais mērķis ir sniegt lietotājiem vienkāršotu alternatīvu un draudzīgu lietošanā sistēmu uzskaites veikšanai, apvienojot iespēju glabāt informāciju un veikt pārskatus vienā vietā.

An Economic Assessment of Micro-Scale Use of Renewable Energy Sources: Two Case Studies

2015

During recent times, renewable energy technologies have shown a relative fast growth in the global energy investment, global energy capacity and their integration within multiple sectors, particularly in the electricity sector. Renewable energy technologies have also experienced notorious declining costs on their manufacturing production. Nevertheless, while this growth is widely acknowledged, the share of renewables with respect total energy production has been moderate. Technological advancements in renewable energy have demonstrated the potential of renewables in energy generation and also that renewables can provide direct and indirect advantages over their counterparts. This thesis inv…

Analisi del regime anemometrico a scala urbana della città di Palermo

2010

Allo scopo di valutare la possibilità di sfruttare l’energia eolica anche in zone fortemente urbanizzate recentemente la Comunità Europea ha posto tra le sue priorità scientifiche la redazione di atlanti eolici a piccola scala. Al fine di fornire dati che possano condurre ad una corretta valutazione eolica di centri urbani, nel seguente lavoro vengono analizzate le caratteristiche del regime anemometrico dell'area urbana di Palermo, registrate da un rete di monitoraggio automatica afferente al Dipartimento di Ricerche Energetiche ed Ambientali (DREAM) e composta da quattro stazioni meteo. Dopo un esame statistico preliminare, in cui le serie temporali della velocità del vento sono state div…

Lagrangian matches between observations from aircraft, lidar and radar in a warm conveyor belt crossing orography

2021

Warm conveyor belts (WCBs) are important airstreams in extratropical cyclones, often leading to the formation of intense precipitation and the amplification of upper-level ridges. This study presents a case study that involves aircraft, lidar and radar observations in a WCB ascending from western Europe towards the Baltic Sea during the Hydrological Cycle in the Mediterranean Experiment (HyMeX) and T-NAWDEX-Falcon in October 2012, a preparatory campaign for the THORPEX North Atlantic Waveguide and Downstream Impact Experiment (TNAWDEX). Trajectories were used to link different observations along the WCB, that is, to establish so-called Lagrangian matches between observations. To this aim, a…

Novel techniques for wind speed spatial estimation

2007

Estimation of wind velocity over a complex terrain using the Generalized Mapping Regressor

2010

Abstract Wind energy evaluation is an important goal in the conversion of energy systems to more environmentally friendly solutions. In this paper, we present a novel approach to wind speed spatial estimation on the isle of Sicily (Italy): an incremental self-organizing neural network (Generalized Mapping Regressor – GMR) is coupled with exploratory data analysis techniques in order to obtain a map of the spatial distribution of the average wind speed over the entire region. First, the topographic surface of the island was modelled using two different neural techniques and by exploiting the information extracted from a digital elevation model of the region. Then, GMR was used for automatic …