Wood chip drying in connection with combined heat and power or solar energy in Finland

Samuli Rinne, Henrik Holmberg, Tiina Myllymaa, Kaisa Kontu, Sanna Syri

    Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

    7 Sitaatiot (Scopus)
    259 Lataukset (Pure)


    20% of the Finnish district heating (DH) power plant fuels are wood-based and the share is increasing. The wood fuel demand probably exceeds the potential supply in the future. The wood fuel drying with waste heat is one profitable opportunity to gain more wood fuel. If the drying energy can be produced with lower primary energy use than combusting the fuel directly, the drying potentially improves the system efficiency. In this study, the drying feasibility in the connection of a combined heat and power (CHP) system, possibly with solar collectors, is calculated. The wood fuel heating can be increased profitably by 6%, using the heat from CHP for drying only when the marginal cost of the heat is low enough, i.e. the electricity price is high enough and there is free capacity after the DH demand. Although the drying is profitable, a larger heat storage can also increase the annual result similarly. The best investment choice depends on the plant properties. Here the optimal system enables 20% DH production cost savings. Solar heat may be profitable, when the solar heat has a 2–3% share of the annual heat demand. However, the dryer or larger storage tank are more profitable investments.
    OtsikkoE2C 2013 - 3rd European Energy Conference
    ToimittajatLivia Sarkadi, Norbert Kroó, Nicoli Armaroli, Josef Ongena, Augustin McEvoy, Zsolt Fülöp
    KustantajaEDP Sciences
    DOI - pysyväislinkit
    TilaJulkaistu - 2014
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
    TapahtumaEuropean Energy Conference - Maastricht, Alankomaat
    Kesto: 17 huhtik. 201220 huhtik. 2012
    Konferenssinumero: 2


    NimiEPJ Web of Conferences
    KustantajaEDP Sciences
    ISSN (elektroninen)2100-014X


    ConferenceEuropean Energy Conference


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