Search results for "kaukolämmitys"

Aikasarjojen perusrakennemalleista ja niiden soveltaminen Jyväskylän kaukolämmön kulutuksen analysointiin ja ennustamiseen

1997

Multicriteria evaluation of carbon-neutral heat-only production technologies for district heating

2018

Climate change mitigation requires reducing dependence on fossil fuels and transition to low carbon energy production technologies. Nearly half of the global final energy consumption is thermal energy produced from technologies with high carbon dioxide emission. As such, it is imperative to employ carbon-neutral heat production to achieve a sustainable energy system. This paper presents a real-life case of applying multicriteria decision analysis for evaluating carbon-neutral heat-only production technologies in a major district heating system in Finland. A group of 10 experts from the energy company contributed in defining the alternative technologies and multiple economic, technological, …

Puuperäisiä biomassoja ja mikroturbiinitekniikkaa hyödyntävän pienen kokoluokan CHP-laitoksen mallintaminen osaksi aluelämpöverkkomallia

2015

Tässä tutkielmassa mallinnettiin MATLAB:lla pienen kokoluokan (< 1MW) yhdistetty lämmön- ja sähköntuotantoyksikkö (CHP), joka hyödyntää puuperäisiä biomassoja polttoaineena ja mikroturbiiniteknologiaa sähkön tuottamiseen. Mallinnustyö jakaantui tarkastelemaan puuhakkeen ja pellettien palamisessa muodostuvia savukaasuja, Turbec T100- mikroturbiinijärjestelmän sähköntuotantoa, vastavirta lämmönvaihtimien toimintaa sekä koko yksikön liittämistä osaksi VTT:n rakentamaa aluelämpöverkkomallia. In this thesis, a MATLAB based model was constructed of a small scale (< 1MW)combined heat- and power production (CHP) unit which utilizes woody biomasses as fuel and microturbine technology in the producti…

Stochastic multicriteria evaluation of district heating systems considering the uncertainties

2018

It is of great importance to choose a suitable district heating (DH) system for a specific DH area from the economics, environment and energy (3E) points of view. This is a multicriteria decision making problem, in which the criteria performance values (PVs) and weighting are characterized by uncertain or imprecise information. In this study, seven candidate DH systems are evaluated from the viewpoints of 3E by the stochastic multicriteria acceptability analysis (SMAA) method. SMAA is able to handle the uncertainties of the criteria PVs and the weighting at the same time. These uncertainties are very common and typical in real-life, but in most cases are not treated judiciously or just negl…