Statistical information form the Danish EPC database - use for the building stock model in Denmark

Transkript

1 Statistical information form the Danish EPC database - use for the building stock model in Denmark Kim B. Wittchen Danish Building Research Institute, SBi AALBORG UNIVERSITY

2 Certification of buildings From 1997 to 2006, a total of approx certificates were issued, incl large (+1500 m²) buildings certified every year The annual certification rate of single family houses was approx In the current EP scheme (since September 2006), approx buildings have been certified Detailed data from certification of more than 1 million houses exist in a number of different databases, with slightly different content 2

3 Additional data-souces BBR (dwelling and building stock register) Was designed to deliver basic information for assessment of real estate and for censuses Holds information about 1.6 million properties, 3.8 million buildings and 2.7 million dwellings and commercial units E.g. information about construction year, build up area, heated floor area, primary constructions and installations Statistics Denmark 3

4 Energy certified detached houses (2004) - according to construction year BR

5 Typical construction periods Before shift in tradition hollow core walls insulated hollow core first energy requirements in BR61 sharpened energy requirements in BR72 sharpened energy requirements in BR78 sharpened energy requirements in BR98 sharpened energy requirements in BR06 sharpened energy requirements in BR10 sharpened energy requirements in BR15 introduction of nearly zero energy buildings 5

6 Example buildings 6

7 External walls U-values Ydervægge, registreret 1,4 1,2 1 [W/m²K] 0,8 0,6 0,4 0, Stuehuse Parcelhuse Rækkehuse Etageboliger Handel & service 7

8 Windows, U-values Vinduer, registreret 2,8 2,7 2,6 [W/m²K] 2,5 2,4 2,3 2, Stuehuse Parcelhuse Rækkehuse Etageboliger Handel & service 8

9 External walls Parcelhuse ( ) Parcelhuse ( ) 2,0 Parcelhuse ( ) 2,0 Parcelhuse ( ) 2,0 2,0 45% 45% 1,8 1,6 45% 1,8 1,6 45% 1,8 1,8 1,6 35% 1,4 35% 1,4 35% 1,4 1,2 1,2 1,6 1,2 25% 1,0 25% 1,0 25% 1,0 15% 35% 0,8 0,6 15% 0,8 0,6 15% 1,4 0,8 0,6 5% 0,4 0,2 5% 0,4 0,2 5% 1,2 0,4 0,2 0,0 0,0 0,0 0-0,1 0,1-0,2 0,2-0,3 0,3-0,4 0,4-0,5 0,5-0,6 0,6-0,7 0,7-0,8 0,8-0,9 0,9-1 > 1 25% Ydervægge (SfB=21) Massiv ydervæg Hul ydervæg Let ydervæg U_gns 0-0,1 0,1-0,2 0,2-0,3 0,3-0,4 0,4-0,5 0,5-0,6 0,6-0,7 0,7-0,8 0,8-0,9 0,9-1 > 1 Ydervægge (SfB=21) Massiv ydervæg Hul ydervæg Let ydervæg U_gns 0-0,1 0,1-0,2 0,2-0,3 0,3-0,4 0,4-0,5 0,5-0,6 0,6-0,7 0,7-0,8 0,8-0,9 0,9-1 > 1 1,0 Ydervægge (SfB=21) Massiv ydervæg Hul ydervæg Let ydervæg U_gns Parcelhuse ( ) Parcelhuse ( ) 0,8 Parcelhuse ( ) 2,0 2,0 2,0 45% 15% 1,8 45% 1,8 45% 0,6 1,8 1,6 1,6 1,6 35% 1,4 1,2 35% 1,4 1,2 35% 0,4 1,4 1,2 25% 5% 1,0 0,8 25% 1,0 0,8 25% 0,2 1,0 0,8 15% 0,6 15% 0,6 15% 0,6 5% 0,4 0,4 0-0,1 0,1-0,2 0,2 0,2-0,3 5% 0,3-0,4 0,4-0,5 0,5-0,6 0,6-0,7 0,7-0,8 5% 0,8-0,9 0,9-1 > 1 0,2 0,0 0-0,1 0,1-0,2 0,2-0,3 0,3-0,4 0,4-0,5 0,5-0,6 0,6-0,7 0,7-0,8 0,8-0,9 0,9-1 > 1 0-0,1 0,1-0,2 0,2-0,3 0,3-0,4 0,4-0,5 0,5-0,6 0,6-0,7 0,7-0,8 0,8-0,9 0,9-1 > 1 0,0 0-0,1 0,1-0,2 0,2-0,3 0,3-0,4 0,4-0,5 0,5-0,6 0,6-0,7 0,7-0,8 0,8-0,9 0,9-1 > 1 0,0 0,4 0,2 0,0 Ydervægge (SfB=21) Massiv ydervæg Hul ydervæg Let ydervæg U_gns Ydervægge (SfB=21) Massiv ydervæg Hul ydervæg Let ydervæg U_gns Ydervægge (SfB=21) Massiv ydervæg Hul ydervæg Let ydervæg U_gns Ydervægge (SfB=21) Massiv ydervæg Hul ydervæg Let ydervæg U_gns 9

10 Windows Parcelhuse ( ) 8 Parcelhuse ( ) Parcelhuse ( ) 8 8 Parcelhuse ( ) ,5 0, ,5 1, ,5 2, ,5 3, ,5 4,5-5 > 5 Parcelhuse Parcelhuse, Kedel Parcelhuse, Fjernvarme Parcelhuse, El U_gns 0 0-0,5 0, ,5 1, ,5 2, ,5 3, ,5 4,5-5 > 5 Parcelhuse Parcelhuse, Kedel Parcelhuse, Fjernvarme Parcelhuse, El U_gns 0 0-0,5 0, ,5 1, ,5 2, ,5 3, ,5 4,5-5 > 5 Parcelhuse Parcelhuse, Kedel Parcelhuse, Fjernvarme Parcelhuse, El U_gns Parcelhuse ( ) 8 8 Parcelhuse ( ) 8 8 Parcelhuse ( ) ,5 0, ,5 1, ,5 2, ,5 3, ,5 4,5-5 > 5 Parcelhuse Parcelhuse, Kedel Parcelhuse, Fjernvarme Parcelhuse, El U_gns ,5 0, ,5 1, ,5 2, ,5 3, ,5 4,5-5 > 5 0-0,5 0, ,5 1, ,5 2, ,5 3, ,5 4,5-5 > 5 Parcelhuse Parcelhuse, Kedel Parcelhuse, Fjernvarme Parcelhuse, El U_gns Parcelhuse Parcelhuse, Kedel Parcelhuse, Fjernvarme Parcelhuse, El U_gns 0 0-0,5 0, ,5 1, ,5 2, ,5 3, ,5 4,5-5 > 5 Parcelhuse Parcelhuse, Kedel Parcelhuse, Fjernvarme Parcelhuse, El U_gns

11 Average vs example buildings Average building Is composed of small parts of all main construction elements represented in the database Includes the average of all refurbishment works carried out Is a snap-shot of the current building stock Do not exist in the wild To be used for calculating the national energy balance and potential energy savings Example buildings Representative for a certain building period Do only include common upgrading Will change over time as more upgrading s becomes common Do exist in the wild To be used for calculations of typical upgrading scenarios for actual buildings 11

12 Building envelope data The main source of information used to establish the typology buildings is the official handbook of the Danish EPC scheme. This handbook contains all necessary knowledge to issue EP certificates for typically buildings. Envelope data is selected from this handbook, and constructions can thus be identified. 12

13 Example constructions Description Illustration U-value [W/m²K] 12 cm Brick /1 brick (massive) insulation cm brick (massive) cm Brick + 50 mm insulation cm brick (cavity wall), un-insulated cm brick insulated with 130 mm and 110 mm tiled concrete 40 cm brick, 200 mm insulation cm brick (cavity wall), reinsulated with 7,5 cm granulate

14 Heat loss profile,

15 Heat loss profile,

16 Calculated space heating demand 250 Single-family houses kwh/m²

17 Comparison with national energy statistics Net Energy Demand for heating and domestic hot water [PJ] Single-family houses and Terraced houses Block of flats Danish Statistic TABULA approach DK Difference TABULA approach DK -6% 4% 17

18 Calculated energy demand Building type < 75 kwh/m² kwh/m² kwh/m² kwh/m² kwh/m² > 500 kwh/m² Single-family Houses Average ratio No. of buildings Terraced Houses Average ratio No. of buildings Block of flats Average ratio No. of buildings Average ratio between measured energy consumption and calculated energy demand 18

19 Thank you! 19