Simon Pezzutto, Franziska Haas, Dagmar Exner 23.03.2017 Europe´s Building Stock and its Energy Demand: a Comparison between Austria and Italy Simon Pezzutto, Franziska Haas, Dagmar Exner 23.03.2017
CONTENT 1. MOTIVATION 2. INTRODUCTION 3. METHODOLOGY 4. MAIN RESULTS 5. DISCUSSION (COMMENTS ABOUT DATA AVAILABILITY)
1. MOTIVATION H2020 Hotmaps Project, WP2 – Task 2.1: Hotmaps: Heating and Cooling - Open Source Tool for Mapping and Planning of Energy Systems WP2: Open Data Set for EU-28 Task 2.1: Building Stock Analysis
2. Introduction Buildings sector is responsible for approximately 40% of EU’s total primary energy demand Mainly (75%) attributed to: i.) Space heating ~ 2,900 [TWh/a] ii.) Domestic hot water ~ 400 [TWh/a] iii.) Space cooling ~ 200 [TWh/a]
3. METHODOLOGY Data collection - scientific literature analysis: TABULA (IEE), BPIE - DATA HUB FOR ENERGY PERFORMANCE OF BUILDINGS, STATISTIK AUSTRIA – ISTAT Construction periods: i.) Before World War II (1945) ii.) After World War II and before 1960 iii.) 1961 and 1980 iv.) 1981-1990 v.) 1991-2000 vi.) 2001-2010 vii.) Post 2010 y]
3. METHODOLOGY Constructed floor area per period [Mm²] Energy demand: Space heating, DHW, space cooling [kWh/m² a] Building characteristics: U-values, façade types, type of glazing, saddle or flat roof, construction materials, technologies applied, tenure/ownership, occupancy etc. Building typologies: a.) Residential: SFHs, MFHs and ABs (> 8 floors) b.) Service: Office* (Office flats – Office buildings), Trade, Health, Education, Sport, Hotels, Restaurants and Other non- residential buildings * Status quo of the work progress for the service sector
4. MAIN RESULTS Residential Sector: Construction Period [Mm²] AUSTRIA ITALY
4. MAIN RESULTS Residential Sector: Building Type [Mm²] AUSTRIA ITALY
4. MAIN RESULTS Service (Office) Sector: Construction Period [Mm²] AUSTRIA ITALY
4. MAIN RESULTS Service (Office) Sector: Building Type [Mm²] AUSTRIA ITALY
4. MAIN RESULTS Ownership Structure – Residential Sector [Mm²] Austria: - Owner occupied (57%)*, ** - Rented (40%) - Other (3%) Italy: - Owner occupied (92%) Social housing (4%) State, region, municipalities (2%) Commercial (1%) - Other (1%) * 7% of the total Austrian ownership structure regarding the residential building stock belongs to social housing ** Data for state, region, municipalities and commercial ownership structure are missing
4. MAIN RESULTS Ownership Structure – Service (Office) Sector [Nr. of buildings] - Single ownership (41%) - Multiple ownership (41%) - Other (18%) AUSTRIA ITALY Italy: no data for the subdivision of the Italian ownership structure (service building stock) was found
4. MAIN RESULTS Residential sector: development of the space heating and DHW preparation demand ITALY AUSTRIA
4. MAIN RESULTS Residential and Service (Office) sector: development of U-values (walls, windows, roofs, and floors) AUSTRIA ITALY Walls Windows Roofs Floors Walls Windows Roofs Floors Before 1945 1.60 3.30 1.30 1.70 1945 - 1960 0.80 1961 - 1980 0.90 2.30 0.60 1.00 1981 - 1990 0.70 2.10 0.40 1991 - 2000 0.50 1.50 0.30 2001 - 2010 0.20 Post 2010 0.35 1.40 Before 1945 1.80 5.40 2.20 1.90 1945 - 1960 1.60 2.00 1961 - 1980 4.60 1.70 1981 - 1990 1.00 4.10 1.20 1.40 1991 - 2000 0.90 4.00 2001 - 2010 1.30 Post 2010 0.37 2.37 0.33 Residential Walls Windows Roofs Floors Walls Windows Roofs Floors Before 1945 0.70 3.20 1.10 1.20 1945 - 1960 0.63 3.40 1.50 1961 - 1980 0.67 2.40 0.60 1.00 1981 - 1990 0.57 2.10 0.40 1991 - 2000 0.48 1.40 0.30 0.50 2001 - 2010 0.32 1.30 0.20 Post 2010 0.35 Before 1945 1.20 5.50 0.80 1.30 1945 - 1960 1961 - 1980 4.90 0.50 1981 - 1990 4.20 1991 - 2000 3.60 2001 - 2010 0.60 2.60 1.40 Post 2010 0.37 2.37 0.33 Service (Office)
4. MAIN RESULTS Service (Office) sector: development of the space heating and DHW preparation demand ITALY AUSTRIA
4. MAIN RESULTS Residential sector: development of the space cooling demand ITALY AUSTRIA
4. MAIN RESULTS Service (Office) sector: development of the space cooling demand ITALY AUSTRIA
5. DISCUSSION - COMMENTS ABOUT DATA AVAILABILITY There is a lack of data concerning space cooling The terms energy demand and consumption are erroneously used interchangeably Inconsistency between data sources DHW values for the service sector
5. DISCUSSION - COMMENTS ABOUT DATA AVAILABILITY While the Austrian & Italian building stocks are well investigated there still is a lack of information concerning energy demand values for space heating, DHW and space cooling according to the different construction periods. Constructed floor area Residential part: huge amount of data, also for various construction periods and different building typologies Service part: small amount of data, especially for different construction periods and different building typologies Ownership structure Small amount of data for all sectors, problem of correspondent data Energy demand Space heating: huge amount of data, also for different building typologies DHW preparation: medium amount of data, especially for the office sector Space cooling: real lack of data, especially for the residential sector
THANK YOU FOR YOUR ATTENTION! simon.pezzutto@eurac.edu