Low Carbon Buildings Workshop

Transcription

1 Low Carbon Buildings Workshop Dan Lash University of Exeter, Centre for Energy and the Environment Thomas Store Constructing Excellence South West

2 Workshop Structure Content: 1. New Buildings 2. Existing Buildings 3. Materials and Supply Chains Aims: 1. To meet and network with others involved in the area 2. To collectively identify opportunities and barriers 3. To discuss what me might all need to take things forward

3 NEW BUILDINGS

4 Regulatory Context: Zero-Carbon New Buildings

5 The Consultation to Part L (2013) Analysis by CLG suggests: Homes: Preferred standards for new homes could be met with improvements to the building fabric (walls and windows etc). Non-domestic: Preferred standards more ambitious, and are likely to require renewable energy e.g. PV as well as improved building fabric. Likely incorporation of Energy Efficiency Standard for Homes in preparation for 2016, though retain CO 2 reduction on notional building Potential new quality assurance standard for homes to be developed by the supply chain e.g. Part L 2013 compliant Home renovation (windows, loft conversion, boiler replacement) trigger consequential improvements link to Green Deal inc. loft, cavity, cylinder insulation, and draughtproofing. 5

6 Energy Efficiency Standard

7 Extreme Efficiency: Passivhaus Super-insulation (< 0.15 W/m 2.K) Super windows and doors (< 0.8 W/m 2.K) Thermal bridging eliminate! Air tightness (< 1 m 3 /h/m 2 ) Whole house MVHR (> 75% efficiency)

8 Carbon Compliance

9 Allowable Solutions (indicative)

10 Allowable Solutions (indicative)

11 Allowable Solutions (indicative)

12 Other Sustainability Issues BREEAM Management Health & Wellbeing Energy Transport Water Materials Waste Land Use &Ecology Pollution CSH Energy/CO 2 Water Material Surface Water Run-off Waste Pollution Health and Wellbeing Management Ecology

13 Workshop Questions 1. What is your involvement in new buildings and low carbon? 2. What are the opportunities for you around the low carbon building agenda? 3. What are the barriers in your experience of delivering low carbon buildings? 4. What can you/we all do to 1. grasp the opportunities and overcome the barriers?

14 EXISTING BUILDINGS

15 Existing buildings Approximately 75% of houses and 60% of nondomestic buildings in 2050 are likely to have been built before 2010

16 Carbon Emissions in Buildings

17 Retrofit for the Future TSB funded 17 million project Phase 1 was 194 design and feasibility studies (up to 20k each). Phase 2 took 86 of these and funded whole house retrofits (average of 142k!!!)) Requirements were 17 kgco 2 /m 2 /year SAP and 115 kwh/m 2 /yr primary energy Website shows database of projects and targets and in some cased measured performance

18 The Green Deal billion investment over the next decade, 65,000 insulation and construction jobs by 2015.

19 The Golden Rule

20 ...and ECO 1.3 billion p.a. obligation on Energy Companies Carbon reduction: 0.52MtCO2/yr by 2015 (equivalent to 2.0MtCO2/yr in 2022 pro-rata) Affordable warmth: 3.4 billion reduction in notional lifetime costs of heating for low income and vulnerable households by part Carbon Reduction to 1 part Affordable Warmth

21 Green Deal and ECO Interaction

22 MACC for Efficiency and RHI measures

23 Spot the Passivhaus 23

24 Enhanced Capital Allowances Enable a business to claim 100% first-year capital allowances on their spending on qualifying plant and machinery. There are three schemes for ECAs: Energy-saving plant and machinery Low carbon dioxide emission cars and natural gas and hydrogen refuelling infrastructure Water conservation plant and machinery

25 Smart Grids and Appliances

26 Renewable Energy: The Feed In Tariff 26

27 PV FIT levels 27

28 RHI Tariff Levels 28

29 Workshop Questions 1. What is your involvement in refurbishment of existing buildings and low carbon? 2. The Green Deal is the Government s flagship policy on refurbishment what does it mean to you? 3. Are there other opportunities for you around the low carbon agenda in existing buildings? 4. What are the barriers in your experience of refurbishing existing buildings? 5. What can you/we all do to 1. grasp the opportunities and overcome the barriers?

30 MATERIALS AND SUPPLY CHAINS

31 Carbon in the life cycle of a building Embodied carbon End-of life Raw materials Transport Maintena nce On-site activities Operational Carbon Operate

32 Life cycle carbon components Total CO2e Footprint Emissions from operating a building Emissions from building maintenance In Use CO2e Embodied CO2e Embodied emissions in materials Emissions from construction site activities (incl transport) End-of-life CO2e Emissions from on-site demolition activities Emissions from materials in landfill

33 How significant is embodied carbon? BASIC STRUCTURES 100% 75% 50% 25% 0% EMBODIED IMPACTS OFFICES SPORTS BUILDINGS, STADIA HOUSING 0% INFRASTRUCTURE 25% 50% 75% OPERATIONAL IMPACTS 100% HIGHLY SERVICED BUILDINGS

34 Why consider embodied carbon

35 Carbon component profiles

36 Total Cumulative Carbon Emissions (tco2/m 2 ) Life cycle carbon profile Baseline (Building Regs) SWRDA Offices Case Study Demolition 5% Design 1% Construction 27% 3.00 Operation 66% Demolition Operation Design Construction Year

37 Building business value through reducing carbon Suppliers-sales of green products, labels. LCA, compliance Contractors Reducing on site carbon, specifying green products, educating supply chain Developers standard green specs, demonstrate whole life cost benefit approach Design teams / Consultants value engineering, maximise recycled, reclaimed materials, stepped methodical approach

38 Workshop Questions 1. What are the drivers for your organisation to address embodied carbon? 2. What opportunities exist for you in trying to lower embodied carbon in buildings? 3. What are the barriers in your experience of trying address embodied carbon? 4. What can you/we all do to 1. grasp the opportunities and overcome the barriers?