Incorporating bio-based materials into Passivhaus and nzeb designs

Transcription

1 Incorporating bio-based materials into Passivhaus and nzeb designs Oliver Style, Progetic

2 Habitat over time 19th Century 20th Century 21st Century 2

3 Designing for extreme climate scenarios 3

4 The tip of the iceberg Construction cost Environmental impact 4

5 Operational energy + embodied energy & 5

6 ISOBIO raw materials Hemp shiv treated/ untreated with sol-gel Hemp fine Hemp fibre Wheat shiv Rape shiv G7, G8, G12 and G14 G7, G8, G12 and G14 G7, G8 and G14 4 treatments on G8 Flax shiv Flax fine Flax fibre Corn cob Corn cob residue G7, G8, G12 and G14 20 Raw Materials provided by CAVAC and 5 Raw Materials processed Physical Characteristics Mechanical Characteristics Hygrothermal Characteristics Chemical Characteristics 6

7 ISOBIO: Insulating core Hemp Straw 7

8 ISOBIO: Modified bio-based binder Lamination / multi-layer 8

9 ISOBIO: Lime render/plaster + hemp 9

10 ISOBIO: Modified clay plasters Optimise fire resistance Maintain moisture buffering properties Maintain workability 10

11 Larixhaus: straw & timber nzeb home 11

12 Larixhaus: straw & timber nzeb home Gross floor area: 142 m2 Useful floor area: 92 m2 Construction time: 6 months Construction cost: 153,782 ; 1.083/m2 Architects: Nacho Martí, Maria Molins & Oriol Martí PHPP, Passivhaus design: Oliver Style Builder: Farhaus Developers: Jordi Vinadé & Itziar Pagès 12

13 Larixhaus: location Source: Google Maps

14 Larixhaus: location 888m a.s.l. Source: Google Maps

15 Larixhaus: timber structure 15

16 Larixhaus: materials, structure & envelope 16

17 Larixhaus: straw insulation 17

18 Larixhaus: thermal envelope Wall build-up [in > out]: 12mm gypsum fibre board 35 mm service void 22mm OSB 4 [airtight layer & vapour barrier] 400mm straw insulation 16mm timber board [vapour permeable] 0,5mm membrane [vapour permeable] 35mm ventilated cavity 26mm larch rain screen cladding 18

19 Larixhaus: straw insulation Target density δ = 90 <> 110 kg/m 3 Measured average density δ = 104 kg/m 3 19

20 Larixhaus: straw insulation Target humidity ϕ 10 % Measured average humidity ϕ = 6 % 20

21 Larixhaus: straw insulation Estimated thermal conductivity λ R = 0.052* *0.25 = W/m K Source: FASBA 2009 Thermal conductivity λ = W/m K 21

22 Larixhaus: thermal-bridge free envelope 22

23 Larixhaus: thermal-bridge free envelope 23

24 Larixhaus: thermal-bridge free envelope 24

25 Larixhaus: prefabrication 25

26 Larixhaus: on-site assembly 26

27 Larixhaus: air tightness 27

28 Larixhaus: mechanical & electrical systems 28

29 Larixhaus: completed & certified building 29

30 Larixhaus: embodied energy 30

31 Larixhaus: embodied energy 31

32 Larixhaus: embodied energy 32

33 Larixhaus: embodied energy 33

34 Larixhaus: embodied energy 34

35 Larixhaus: embodied energy 35

36 Larixhaus: embodied energy 36

37 Larixhaus: embodied energy 37

38 Larixhaus: operational energy use & performance Ground Floor First Floor Outdoor Temp. & RH sensor Indoor Temp.. RH & CO2 sensors 38

39 Larixhaus: operational energy use & performance Winter 39

40 Larixhaus: operational energy use & performance Winter 40

41 Larixhaus: operational energy use & performance Winter 41

42 Larixhaus: operational energy use & performance Summer 42

43 Larixhaus: operational energy use & performance Summer 43

44 Larixhaus: operational energy use & performance Summer 44

45 Larixhaus: operational energy use & performance Summer 45

46 Larixhaus: operational energy use & performance Summer 46

47 Larixhaus: operational energy use & performance Summer 47

48 Larixhaus: operational energy use & performance Indoor air quality 48

49 Larixhaus: operational energy use & performance Indoor air quality 49

50 Larixhaus: capital cost Category Concept Price [ incl. VAT] Foundations & ground floor slab Building structure & thermal envelope Services TOTAL Specific Construction Cost Treated Floor Area PHPP [TFA m 2 ] Gross Floor Area [GFA m 2 ] TOTAL Specific Construction Cost [ /m 2 TFA] TOTAL Specific Construction Cost [ /m 2 GFA] Groundworks 3.000,00 Ground slab 7.165,00 Structure, windows, flooring, inner & outer finishes ,00 Service void, Fermacell and Pavaflex insulation 4.250,00 Straw insulation 900,00 Ventilation unit, ducts, components & installation 6.152,00 Kitchen, bathroom and plumbing services ,00 Electrical services 8.500,00 Heating & DHW services 6.450, ,00 91,50 142, , ,97 50

51 Larixhaus: capital cost Category Price [ incl. VAT] Foundations & ground floor slab ,00 Building structure & thermal envelope ,00 Services ,00 Fees & Permits ,00 TOTAL ,00 51

52 Larixhaus: operational energy use Measured vs. calculated PHPP & Spanish CTE Building regulations * Period: 01/09/ /09/2016 PHPP [kwh/m2 a] [kwh/m2 a] Equip., lighting, aux. elec DHW production 17.8 MVHR Unit 3.3 Space heating 12.0 Total energy consumption 40.5 Spanish CTE 2009 Measured * [kwh/m2 a] Total anual heating bill: 73,75 52

53 Larixhaus: running cost

54 Larixhaus: running cost Concepto kwh Coste Equipos, iluminación, elec. aux Producción ACS Máquina ventilación Calefacción electricidad Calefacción leña TOTAL Total anual heating bill: 73,75

55 ISOBIO objectives 50 % lower embodied energy & carbon 20 % increase in thermal insulation 15 % reduction in cost vs. oil-based & traditional alternatives 55

56 Conclusions Bio-based materials work They are safe and cost effective They can be procured for nearly-zero energy buildings, in compliance with EPBD Directive 2010/31/EU The ISOBIO consortium is working to improve their performance and reduce their cost, removing barriers for large-scale uptake 56

57 THANK YOU Oliver Style Progetic C/Ramon Turró Barcelona. Spain 57