Cost optimal and net zero energy office buildings solutions using small scale biomass-based cogeneration technologies

Ayman Mohamed, Ala Hasan, Kai Sirén

    Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference contributionScientificvertaisarvioitu

    1 Sitaatiot (Scopus)

    Abstrakti

    In this study, four different small-scale biomass-based cogeneration heat and power (CHP) technologies along with three conventional energy generation systems serving an office building in Helsinki, Finland are investigated to find the local cost-optimal solutions for minimum energy performance for each as well as the global cost optimal solution. The Energy Performance of Building Directive (EPBD) comparative framework methodology is followed. All building combinations are simulated by IDA-ICE 4.5 software including building energy efficiency measures/packages; external wall insulation, window type, and envelope air-tightness, and building service system packages including ventilation system, and daylight control. The reference case is defined consisting of a reference building built in accordance with the current building code served by district heating and vapor compression cycle cooling system (DH-VCR). The results show that the pellet boiler with vapor compression refrigeration system (PB-VCR) has global cost-optimal solution. When the CHP capacities are sized to cover the peak thermal demands, the low power-to-heat (P/H) ratio CHP technologies have life cycle cost (LCC) less than the reference case, while the CHP technologies with high P/H have higher LCC. The reason for that is the high investment cost relating to higher associated electrical capacities as well as high operational energy costs due to lower thermal efficiency. However, optimizing the CHP capacity and installing an auxiliary pellet boiler means that all investigated CHP technologies have LCC less than the reference case. Furthermore, the net zero energy building (NZEB) solutions extended - by implementing photovoltaic system (PV) - for the cost-optimal solutions have lower LCC than those extended based minimum energy performance solutions.

    AlkuperäiskieliEnglanti
    OtsikkoBuilding Simulation Applications, BSA 2015 - 2nd IBPSA-Italy Conference
    KustantajaFree University of Bozen Bolzano
    Sivut263-272
    Sivumäärä10
    Vuosikerta2015-February
    ISBN (painettu)9788860460745
    TilaJulkaistu - 1 tammikuuta 2015
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
    TapahtumaBuilding Simulation Applications - Bozen-Bolzano, Italia
    Kesto: 4 helmikuuta 20156 helmikuuta 2015
    Konferenssinumero: 2

    Conference

    ConferenceBuilding Simulation Applications
    LyhennettäBSA
    Maa/AlueItalia
    KaupunkiBozen-Bolzano
    Ajanjakso04/02/201506/02/2015

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