Let s talk about buildings Wood as a key to sustainable innovation in buildings

Transcription

1 Let s talk about buildings Wood as a key to sustainable innovation in buildings Energy Cities, Building the energy transition April 2013 Växjö, Sweden Eva Gustafsson, Environmental and energy coordinator Södra Skogsägarna Ekonomisk förening 1

2 Södra facts Economic association owned by forest owners Net sales of MSEK (2012) employees 4 pulp mills in Sweden and Norway produce 1,8 million tonnes of pulp per year 11 sawmills (2 leaf sawmills) and 2 impregnation plants in Sweden and Norway produce 1,4 million m 3 of sawn timber per year House manufacturer in Sweden (Trivselhus) 16 interior wood production plants in Sweden, Norway, Denmark and Lithuania 2 pellets factories in Sweden 2

3 Wood a renewable raw material Södra has an affiliated forest area of 2,4 million hectares In 2012, wood from Södra s members represented 10 % of the total harvesting in Sweden Most of the wood raw material is used in Södra mills for further processing into pulp, construction timber and interior wood products Södra works with FSC (58 % of member forest area) and PEFC TM (72 % of member forest area) forest certification systems Well-developed environmental consideration in the forest (green forest management plans, certified forestry contractors and green driving licenses) 3

4 Towards fossil free production Södra s industry used more than 12 TWh of fuels in 2012 for the production of pulp, sawn timber and interior wood products 95 % of the fuels were biofuels Södra is a net producer of green electricity, more than 100 GWh was delivered to the electricity grid in 2012 Södra also delivered 450 GWh district heat and 3.8 TWh solid biofuels in

5 Forest binds carbon dioxide Carbon footprint for sawn timber Ten toes of carbon footprint (CEPI*) CO 2 -eqv (ton/m 3 ) 1. Carbon sequestration in forests -0,2 2. Carbon in sawn timber -0,8 3. Greenhouse gas emissions from saw mills 0,0 4. Greenhouse gas emissions associated with producing wood 0,01 5. Greenhouse gas emissions associated with producing other raw materials/fuels 6. Greenhouse gas emissions associated with purchased electricity and heat <0,05 (lack of information) 7. Transport-related greenhouse gas emissions 0,05 0,0 8. Greenhouse gas emissions associated with product use Excluded 9. Greenhouse gas emissions associated with product end-of-life Excluded 10. Avoided emissions and offsets -0,2 Total -1,1 5 *Confederation of European Paper Industries

6 Sustainable innovation Ongoing research projects focus on new processes and products. Efficient use of the timber resource results in both economic and environmental gains. Finger jointing of centerboards to produce sawn timber of correct lengths and in long lengths Wet gluing of sideboards to produce beams that could replace steel and concrete as a construction material Horizontal and vertical finger joints Wet gluing CBBT Centre for building and living with wood, cooperation with Växjö municipality, Linnaeus university, SP Trätek (Swedish national research center) and other wood industries More Södra innovation: DuraPulp a fully biodegradable composite made of cellulosic fibers and the biopolymer PLA (poly lactic acid) Textile pulp a raw material made of birch that could be used for viscose production 6

7 Building multi-storey dwellings in wood Södra a pioneer In 1994 Södra started to build multi-storey dwellings (Wälludden) with wooden frames in cooperation with Skanska after a more than 100 years long national ban on building houses in wood with more than two storeys. Södra s head office is located in the middle of the area called Välle Broar The modern city built of wood. Välle Broar is the largest project in Sweden to build apartment buildings in wood. Växjö municipality interacts in Välle Broar with Linnaeus University, construction companies and wood industries, among them Södra. 7

8 Pros and cons of building houses in wood + Wood is a good building material! High strength gives large span Fireproof glulam beams Provides good indoor climate Climate friendly Captures CO 2 Recyclable + Wood is beautiful! - Building in wood demands short outdoor construction time - Covering the building material is necessary 8

9 Södra Climate Arena a passive house built of wood The world s first tennis arena in passive house technology All parts of the building above ground are built of wood Consists of 750 m 3 wood of which 350 m 3 in the glulam beams Mainly spruce but also pine and ash Timber delivered from Södra s members (except the glulam beams) 9

10 Södra Climate Arena low energy consumption Heating is supplied from the people and from the lightning in the premises District heating (biofuel based) is used on cold days, cooling with ground water is possible on hot days Measured consumption: 11 kwh/(m 2,year), reference area m 2 Low operating costs in combination with environmental benefits 10

11 Wood is a key to sustainable innovation in buildings! Thank you for your attention! Any questions? Contact information Eva Gustafsson Environmental and energy coordinator Södra Skogsägarna Ekonomisk förening eva.gustafsson@sodra.com