Climate Protection in the Building Sector

Transcription

1 BBR Bonn 2011 Climate Protection in the Building Sector - Improving the Energy Performance of Federal Buildings Dr.-Ing. Olaf Böttcher - Commissioner for Energy in Federal Buildings - Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR) within the Federal Office for Building and Regional Planning (BBR) Sydney,

2 Commissioner for Energy in Federal Buildings Tasks: Minimization of the energy demand/consumption in Federal Buildings Optimization of the energy supply concepts in Federal Buildings Broad use of renewable energies Monitoring of assorted Federal Buildings in the first years of operation Certification of the Energy Demand regarding to EnEV for assorted Federal Buildings Consultation of the Ministry in questions of energy-saving in Buildings

3 Commissioner for Energy in Federal Buildings Methods: Activities in Federal Building Projects Definition of the specific energetic aims Participation in meetings Consultation of the building owner Preparation of assessments to the achieved energetic quality in the different planning steps Monitoring of innovative systems (technical and structural) Monitoring of the Energy Consumption in assorted Federal Buildings

4 Political Background

5 Policy Measures in the Building Sector Instruments to lower the energy demand/consumption in Buildings: Laws and Ordinances Financial Benefits Heating Costs Ordinance Energy Saving Ordinance Information, Transparancy in the market Best Practice Projects, Monitoring of the achieved effects Research Programmes Renewable Energies Heat Act Information, best practice projects (dena) Modernisation programme (funding) (KfW)

6 Political Parameters - European Level (1/2) Energy Performance of Buildings Directive (2010/31/EU) since to execute for residential and non-residential buildings to execute for new buildings and for refurbishments of existing buildings Requirements to: a minimum standard of energy efficiency for certain technical systems in buildings (Heating, Ventilation, ) the energetical standard of the building envelope of new buildings others Nearly Zero Energy Building There is a special responsibility in public building sector!

7 Political Parameters - European Level (2/2) Energy Efficiency Directive (2012/27/EU) since Subject matter: a common framework of measures for the promotion of energy efficiency within the Union in order to ensure the achievement of the Union s % headline target on energy efficiency It lays down rules designed to remove barriers in the energy market and overcome market failures Requierements to: Buildings of the central government Certain minimum of energetical standard Refurbishment rate 3 %/a Public Procurement Energy audits and Energy management systems others There is a special responsibility in public building sector!

8 Political Parameters - National Level (1/2) Energy Saving Act Energy Saving Ordinance (EnEV) since to execute for residential and non-residential buildings to execute for new buildings and for refurbishments of existing buildings Requirements to: Annual demand of primary energy Energetical performance of the building envelope or single parts of the building envelope Certification of the energy demand or the energy consumption others There is a special responsibility in public building sector!

9 source: BMUB and own calculations BBSR Berlin 2011 Policy Measures in the Building Sector - Laws and Ordinances Tightening of requirements to the energy demand of new buildings [kwh/(m²a)] st Thermal Insulation Ordinance st Energy Saving Ordinance ? ??? Requirements for room heating [kwh / m² x a]

10 Political Parameters - National Level (2/2) Renewable Energies Heat Act (EEWärmeG) since to execute for residential and non-residential buildings to execute for new buildings in general, but also for refurbishments of existing buildings in public building sector Requirements to the coverage of the energy demand for heating and/or cooling by using renewable energies: solar thermal energy minimum share of 15 % Heat pumps minimum share of 50 % others The requirements of the Renewable Energies Heat Act are fulfilled too, if there is a certain undercut of the requirements of the Energy Saving Ordinance. There is a special responsibility in public building sector!

11 Energetical Target Specifications for Federal Buildings

12 Energetical Target Specifications for Federal Buildings - Status Quo Edict of the Federal Ministry for Transport, Building and Urban Development from The Federal Government takes the lead. In all Federal Building Projects has to be a certain undercut of the general energetic requirements regarding to the Energy Saving Ordinance In the cases of the erection of new buildings or broad refurbishments of existing buildings: Annual primary energy demand: - 20 % (in case of using heat from CHP: - 30 %) Mean of the heat transfer coefficient: - 30 % In cases of the refurbishment of single building parts in existing buildings the energetic quality of the new building parts shall be better than the corresponding general requirements of the Energy Saving Ordinance The specific degree of the undercut has to be cost effective

13 Energetical Target Specifications for Federal Buildings - Future Objectives Sustainibility Strategy, Board of State Secretaries, Program - Measures for Sustainibility in Administration following up to the negotiated agreement of the Federal Government from the agreed reduction of CO 2 until 2020 will be tightened from 30 % to 50 % (regarding to the emissions of 1990). until the end of the actual legislative period a roadmap for the energetic refurbishment of Federal Buildings has to be developed. The scope of that roadmap is a climate neutral portfolio (in a range of - 80% regarding to the annual primary energy demand of 2010) until 2050 and a reduction of the demand of final energy for room heating by 20 % until 2020 (basis: 2010). About the results of the practical implementation of the roadmap has to be reported in an annual Energy and CO 2 Report. Energy Concept of the Federal Governmant, Eckpunkte Der Weg zur Energie der Zukunft The Federal Government takes the lead. From 2012 all new Federal Buildings will fulfill the Nearly-Zero-Energy-Standard

14 Results and Best Practice Examples

15 Certification of the Energy Demand - Balance Method Balance Method: DIN V Processes: Heating only non-residential buildings DHW mechanical Ventilation Cooling Lighting

16 Bundespräsidialamt BMBF, Neubau Bundeskanzleramt Auswärtiges Amt, Neubau DBT, Jakob-Kaiser- Haus BMVBS, Bauteil D Schloss Bellevue DBT, Reichstagsgebäude BMVBS, Bauteil A BMELV, Altbau Undercut of the requirements of the Energy Saving Ordinance in % Unterschreitung der EnEV-Anforderung (EnEV 2007) in % Certification of the Energy Demand - Results for assorted Federal Buildings in Berlin HT' QP' 0 % - 10 % - 20 % - 30 % - 40 % Mean undercut of the requirements of the Energy Saving Ordinance (2007): - 50 % - 60 % - 70 % - 80 % - Annual primary energy demand: - 50 % (new buildings) - 45 % (refurbishment) - 90 % % - Specific heat transfer coefficient (transmission): - 55 % (new building) - 40 % (refurbishment) neu new errichtet Buildings sanierter refurbished Bestandsbau Buildings

17 Energy and CO 2 -Report - Results for Federal Buildings Total CO 2 -equivalent GHG-Emissions for Federal Buildings (2008)

18 Improving the Energy Performance - Strategy Building related Energy Demand: Building Envelope Thermal Bridges Air Tightness Compactness Share of Windows Shading Devices Building User related Energy Demand: Number of Office Equipment Quality of Office Equipment Operating Time of Building Operating Time of Equipment Renewable Energies Photovoltaics Solar Thermal Collectors Ground Water User Ground Heat Air Other Environmental Potential

19 Improving the Energy Performance - Strategy Production of Energy (using renewables energy sources) 2 Plus-Energy-Building Strategy: 1. Minimize the demand of energy 2. Optimize the coverage of the minimized demand of energy by a broad use of renewable energies Conventional Building 1 Demand of Energy

20 UBA Dessau - Energy Concept Absorption Chiller Compression Chiller Oil Electricity Building envelope (U-Values): External Wall: 0,15 W/(m²K) Roof: 0,12 W/(m²K) Bottom Slab: 0,29 W/(m²K) Windows: 1,2-1,4 W/(m²K) Free Cooling PV Technical Systems: Lighting: electronic ballast; control dependingon presence and daylight Ground to Air Heat Exchanger Solar Heat District Heat Photo: Busse Gas Heat Recovery Ventilation: controlled high efficient fans minimal pressure losses in the air system Auxiliary Energy: controlled, high efficient pumps

21 BMU Berlin - Energy Concept District Cooling Free Cooling Electricity (power supplier) FC PV Building envelope Refurbishment (U-Values): External Wall: 0,15 1,06 W/(m²K) Roof: 0,12 0,17 W/(m²K) Bottom Slab: 0,18-28 W/(m²K) Windows: 1,4-1,7 W/(m²K) Building envelope New Building (U-Values): District Heating Heat Recovery Fuel Cell (FC) (natural gas) Heat Pump (waste water) External Wall: 0,11 0,17 W/(m²K) Roof: 0,11 W/(m²K) Bottom Slab: 0,11 W/(m²K) Windows: 0,76 W/(m²K) Technical Systems: Lighting: electronic ballast; control dependingon presence and daylight Ventilation: controlled high efficient fans minimal pressure losses in the air system Auxiliary Energy: controlled, high efficient pumps

22 1st Federal Net-Zero-Energy-Building - Energy Concept Building envelope (U-Values): External Wall: 0,10 W/(m²K) Roof: 0,08 W/(m²K) Bottom Slab: 0,11 W/(m²K) Windows: 0,80 W/(m²K) Technical Systems: Lighting: electronic ballast; control depending on presence and daylight Ventilation: controlled high efficient fans minimal pressure losses in the air system Auxiliary Energy: controlled, high efficient pumps Office equipment: high energy efficiency

23 Net-Zero-Energy-Building - Energy Balance (Electricity) Kühlung Cooling Hilfsstrom Auxiliary current / zentrale / central Dienste services Heizung + WW Heating and DHW Cooling Kühlung 2% 2% Hilfsstrom / Auxiliary current / zentrale Dienste central services 11% 11% Lüftung Ventilation Office Büroausstattung equipment 33% 33% Heizung Heating + and WWDHW 12% 12% kwh/a PV PV Beleuchtung Ligthing sonst. Other equipment Geräte Other sonst. equipment Geräte 4% 4% Lüftung Ventilation 14% 14% Beleuchtung Lighting 24% Büroausstattung Office equipment

24 Modell: Anderhalten Architekten Berlin next Project: 2nd Federal Net-Zero-Energy-Building

25 Summary The public building sector has a special responsibility in the field of energy efficiency and the protection of the climate. The Federal Government does accept this special responsibility. The German Government has started a lot of activities to reduce the energy demand in buildings at an early stage. In Germany there are National Regulations for the energy demand in residential and nonresidential buildings. The National Regulations are adjusted in time regarding to the European Regulations. There are continuative regulations for Federal Buildings: Commissioner for Energy in Federal Buildings Guideline for Sustainable Building Assessment System Sustainable Building BNB We develop a roadmap for the energetic refurbishment of Federal Buildings. The objective of that roadmap is the development of a climate neutral stock of Federal Buildings

26 Thanks for your attention!