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Oil-shale electricity LCA LCA presentation Reeli Susi 28.03.2005


Oil-shale electricity LCA LCA presentation Reeli Susi 28.03.2005 Introduction EU LIFE-Environment programme demonstration-project: Introduction and Implementation ... – PowerPoint PPT presentation

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Title: Oil-shale electricity LCA LCA presentation Reeli Susi 28.03.2005

Oil-shale electricity LCALCA presentation Reeli
  • EU LIFE-Environment programme demonstration-projec
    t Introduction and Implementation of Life Cycle
    Assessment Methodology in Estonia Effects of Oil
    Shale Electricity on the Environmental
    Performance of Products (OSELCA)
  • OSELCA Oil Shale Electricity Life Cycle
  • Partners Estonian stateowned energy company
    Eesti Energia AS, Finnish Envir. Institute
    SYKE, estonian consultancy Cycleplan Ldt.
  • Country-specific energy production data will be
    available through the OSELCA project.
  • Carried out 2003-2005 y.

Methodology Description of the current Estonian
electricity production profile and future
electricity supply scenarios
  • Estonia is the only country in Europe that has a
    significant oil shale mining industry. Oil shale
    is a fossil fuel, which is burned in thermal
    power plants (TPP) to generate electricity and
    heat. The oil shale power plants produce about
    95 of Estonian electricity, making oil shale
    based energy production a strategic industry in
    Estonia, which utilizes extensive amounts of
    natural and human resources. Therefore in
    Estonia, because of this unique electricity
    production profile, the oil shale energy
    production system had to be examined first,
    before other LCA-studies for Estonian products
    could be carried out!!!

  • The method of finding out the electricity
    consumption in Estonia was following from the
    net production the Power Plants (PP) self-usage,
    distribution networks (incl. company's equipment)
    technical losses and export were subtracted and
    import was added. It means that electricity,
    which was not delivered to the potential Estonian
    consumers, was not taken into account and whole
    imported electricity was included. Such approach
    guarantees that all the environmental impacts of
    electricity, consumed in Estonia (which could be
    generated anywhere in the region, whereas the
    production technology and source are taken into
    account), shall be determined.

  • In following the method of finding out the
    structure and profile for the current situation
    is described
  • Firstly, the Estonian electricity production
    was categorised on the basis of production
    technology. Then each category had its share in
    total production, which was converted on the
    basis of electricity consumption. In addition,
    the imported electricity was classified according
    to the production technologies of the country of

Ca 90 of used electricity was produced using
oil-shale including oil shale condensation, oil
shale co-generation (CHP), oil shale
carbonisation gas and shale oil. This structure
shows the importance and influence of the oil
shale industry in current electricity production
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  • In this study the environmental impact of
    produced electricity will be analysed according
    to different scenarios (electricity generation
    profiles) in year 2020. The effect of the impact
    assessment is based on the amount of electricity,
    consumed in Estonia.

Methodology Overview of the life cycle inventory
analysis (LCI) of oil-shale electricity
LCI involves the collection and quantification
of inputs and outputs for a product system under
investigation throughout its whole life
cycle.Data collection- fiscal year
2002.Numerous meetings with environmental,
production and other specialists were organised
in order to obtain necessary basic data.
  • Enterprises involved in the product system of oil
    shale electricity Aidu and Narva open casts,
    Viru and Estonia mines, Eesti and Balti PP,
    explosive factory Orica Eesti, Eesti Põlevkivi
    headquarters, mining technology factory
    Mäetehnika and railway transportation enterprise
    Põlevkivi Raudtee.
  • On the basis of technological schemes the process
    flow diagrams were elaborated in the environment
    of KCL Ecodata (Keskuslaboratorio Oy 2003,
    Finnish LCA software KCL-ECO 3.0). Also used LCA
    software such as LIPASTO (Technical Research
    Centre of Finland,VTT), IISI database
    (International Iron and Steel Institute) and
    Ecoinvent (Swiss Centre for Life Cycle

Some examples of the process flow diagrams
  • Technological schemes (process flow diagrams) of
    all open casts, underground mines and power
    plants (belonging to the product system of oil
    shale electricity) were composed.
  • The modules of each production unit belonging to
    the product system of oil shale electricity.

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Allocation is the procedure, which aims at
distributing the environmental burdens
proportionally in a life cycle. Allocation
of oil shale with different qualities in oil
shale mining stage
  • In Estonia mine and Aidu open cast,
    enrichment process is required in order to
    produce oil shale of different quality, suitable
    either for chemical industry or energy production
    in power plants. Allocation for these two
    products was avoided by expanding system

Allocation for electricity and heat energy in
Balti power plant
Allocation for carbonization gas, shale oil and
phenol water in Oil factory
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  • Identification of the differences between the
    environmental impacts caused by oil shale
    electricity and coal electricity through their
    whole life cycles.
  • The environmental impacts of oil shale
    electricity are compared to those caused by hard
  • In order to make a reliable comparison, the
    environmental interventions (emissions, resource
    extractions, land use) of both electricity
    sources are first gathered using the life cycle
    inventory (LCI) methodology of LCA according to
    the standards EN ISO 14040-14041. Next the
    inventory data is analysed by the life cycle
    impact assessment (LCIA) methodology.

more informationhttp//www.energia.ee/OSELCA/
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