2015-Building Energy Standards

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Department of Architecture, Institute of Building Design and Technology (IEB), Building Science (fbta) KIT – University of the State of Baden-Wuerttemberg and National Research Center of the Helmholtz Association www.kit.edu Energy consumption in buildings - state of the art and perspectives Andreas Wagner

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Transcript of 2015-Building Energy Standards

  • Department of Architecture, Institute of Building Design and Technology (IEB), Building Science (fbta)

    KIT University of the State of Baden-Wuerttemberg and National Research Center of the Helmholtz Association www.kit.edu

    Energy consumption in buildings - state of the art and perspectives Andreas Wagner

  • 2 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Indicators of energy performance

    Source: BAfA-Musterbericht

    End energy Primary energy, renewable/non-renewable Primary energy, total CO2-emission equivalents Energy costs

  • 3 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    CO2 emissions caused by buildings in Germany

    Resid. buildings office buildings

    Buildings Industry

    Transport Utilities

    District heating

    Fuel heating

    Electricity

    Agriculture

  • 4 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    The energy-saving potential for heating in buildings

    Source: FhG-IBP

    Primary energy requirement - heating[kWh/m2a]

    building stock

  • 5 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    German building stock

  • 6 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Energy Performance of Buildings Directive

    Source: Voss, Uni Wuppertal

  • 7 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Germanys road map to high energy performance

    Final goal for all buildings: Climate-neutral buildings in 2050

    Introduction of climate-neutrality for new buildings until 2020

    on the basis of primary energy consumption

    Building stock: - Duplication of renovation rate (actually 1% per year) - Reduction of heating energy consumption by 20% until 2020 - Reduction of primary energy consumption by 80% until 2050

    Consideration of economic feasibility

  • 8 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Residential buildings office buildings

    Heat (End Energy)

    Electricity (including plug loads!) (End Energy)

    Primary energy

    Energy consumption of German building stock

    Source: SolarBau:Monitor

  • 9 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Plug loads

    Heating Electricity for HVAC & L

    Energy saving potential for new buildings

    Residential Office

    Standard Advanced Standard Advanced

    Primary energy, kWh/my

    Source: SolarBau:Monitor

  • 10 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    non electrical

    electrical

    co-generation

    PV office

    production

    research

    300 700 kWh/ma

    Primary energy consumption of selected EnOB buildings

    For further information on thr research program EnOB see www.enob.info

  • 11 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    non electrical HVAC

    electrical HVAC+L

    electrical appl.

    office

    production

    research

    Primary energy consumption of selected EnOB buildings, including appliances

  • 12 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Experimental residential building Energy autonomous solar house Freiburg, 1992

    Zero Energy Buildings

    Monte Rosa Htte. Zermatt, 2009

    Source: Nullenergiegebude, Voss & Musall

  • 13 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Net Zero Energy Buildings

    Source: Nullenergiegebude, Voss & Musall

  • 14 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Net Zero Energy Buildings

    Principle of balancing

    Indicator - End energy - Primary energy (incl. renewables) - (equ.) CO2 emissions - Costs

    System boundary - HVAC+DHW+L + Plug loads + e-mobility + external systems (e.g. wind turbines) + embodied energy

    Time period - yearly balance - building life cycle

    Source: Voss, Uni Wuppertal

  • 15 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    building services 100 % based on electricity

    Green electricity grids

    Source: Nullenergiegebude, Voss & Musall

  • 16 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    The future of electricity grids

    Scenario for the development of European electricity grids until

    At present, Germany only uses about 23% renewable energies in electricity grid. Switzerland: ca. 56% Norway: ca. 96%

    Source: Nullenergiegebude, Voss & Musall

  • 17 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Net Zero Energy Buildings (Only-Electricity-Houses)

    Source: Nullenergiegebude, Voss & Musall

  • 18 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Green electrical / heating / cooling / gas grid

    Source: Nullenergiegebude, Voss & Musall

  • 19 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Net Zero Energy Buildings

    Source: Nullenergiegebude, Voss & Musall

  • 20 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Example: Solarsiedlung Freiburg

    Source: Voss, Uni Wuppertal

  • 21 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Annual balance for the settlement in Freiburg

  • 22 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Balance of Net Zero Energy Buildings a proposal

    Credit higher than energy consumption

    Primary energy consumption [kWh/m2a]

    Prim

    ary

    ener

    gy c

    redi

    t [kW

    h/m

    2 a]

    Credit lower than energy consumption

    B

    C

    A

    A: annual total primary energy requirement

    B: A minus the monthly accountable

    yield of solar electricity C: supply of the monthly surpluses to

    seasonal fluctuation

    Source: Nullenergiegebude, Voss & Musall

  • 23 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Example: Single-family house Riehen

    TODO

    Source: Nullenergiegebude, Voss & Musall

  • 24 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Example: Single-family house Riehen

    Source: Nullenergiegebude, Voss & Musall

  • 25 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Performance criteria of Net ZEBs

    Source: Voss, Uni Wuppertal

  • 26 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    without heat pumps / with CHP

    with heat pumps / with PV

    without heat pumps with CHP / PV

    Source: Nullenergiegebude, Voss & Musall

    Annual load and production profiles

  • 27 14.04.2014 Energy consumptions in buildings Building Science (fbta)

    Improved load matching with storage

    Foliennummer 1Foliennummer 2Foliennummer 3Foliennummer 4Foliennummer 5Foliennummer 6Foliennummer 7Foliennummer 8Foliennummer 9Foliennummer 10Foliennummer 11Foliennummer 12Foliennummer 13Foliennummer 14Foliennummer 15Foliennummer 16Foliennummer 17Foliennummer 18Foliennummer 19Foliennummer 20Foliennummer 21Foliennummer 22Foliennummer 23Foliennummer 24Foliennummer 25Foliennummer 26Foliennummer 27


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