Arup green expo

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  • There are a variety of definitions of zero carbon, from a completely autonomous building “off-grid” with it’s own renewable generation, to net zero carbon, where the grid acts as an effective store for on-site generation of variable output, to green tarrifs and carbon off-setting. Net Zero Carbon is the generally accepted definition of Zero Carbon in the building industry, although the requirements for proximity of the generating capacity to the site vary between definitions and standards
  • Typical Carbon Footprint of a new build office
  • Gradual Behaviour Change with information and education Example: energy-efficient appliances Recent research from the Energy Saving Trust indicates just under 60% of people look for energy efficient models when purchasing an appliance. In 2005, for example, more than 90% of washing machines sold in the UK were the most energy efficient “A” rating, compared with just over 40% in 2001: a doubling within four years. If people are given the right information and incentives, they will change their behaviour. Source: “ Action Today to Protect Tomorrow: Mayor’s Climate Change Action Plan”. Greater London Authority. February 2007. http://www.london.gov.uk/mayor/environment/climate-change/docs/ccap_fullreport.pdf
  • Sustainable design elements like: • Twin & triple skin facades to corporate office buildings • Heat recovery ventilation system to apartments • Low energy light fittings are all well understood More recent solutions now coming to the fore include district heating systems for mixed use developments. The scheme also employs a 2MW biomass wood pellet boiler which provides the base heat load to over 1,000,000ft of building space in the development. I will come back to this later on.
  • Gradual Behaviour Change with information and education Example: energy-efficient appliances Recent research from the Energy Saving Trust indicates just under 60% of people look for energy efficient models when purchasing an appliance. In 2005, for example, more than 90% of washing machines sold in the UK were the most energy efficient “A” rating, compared with just over 40% in 2001: a doubling within four years. If people are given the right information and incentives, they will change their behaviour. Source: “ Action Today to Protect Tomorrow: Mayor’s Climate Change Action Plan”. Greater London Authority. February 2007. http://www.london.gov.uk/mayor/environment/climate-change/docs/ccap_fullreport.pdf
  • Variation in cost of low and renewable energy technologies. The most cost-effective technologies tend to be those applicable at a larger scale
  • This approach can offset the full carbon footprint of a development through the use of renewable fuels
  • The cash flow implications relating to sustainability interventions will need to identified. Need to assess the ability of the developer/landlord to capture the value increase. This assessment will need to be tailored to local market conditions. This approach applies to all building types.
  • Arup green expo

    1. 1. Paul Dunne 21st May 2010 Low Carbon Building Solutions
    2. 2. Low and Zero Carbon definitions <ul><li>Site autonomy .............. generates & stores all energy needed on-site </li></ul><ul><li>On-site carbon neutral .. on-site energy generation from imported fuel </li></ul><ul><li>Net zero carbon .......... net exports to Grid are equal to imports </li></ul><ul><li>Near-site zero carbon ... off-site renewables with direct connection </li></ul><ul><li>Additionality ................ dedicated added renewables </li></ul><ul><li>Carbon offsetting ......... paying for others’ renewables </li></ul><ul><li>Green power ............... using off-site renewables already on the Grid </li></ul>1 3 Power station CO 2 4 7 5 2 6
    3. 3. Typical New Build Catering Heating and Hot Water Cooling Fans & Pumps Lighting Office Equipment Misc. Electrical Computer Rooms
    4. 4. Facades 1 3 2
    5. 5. 20 Cooling Systems 40 60 80 120 140 160 180 100 200 220 Total Cooling W/m 2 (perimeter areas) Cooling Loads Mechanical Engineering Façade/System Matching LWB Thermal Mass +Night Vent Natural Vent Upflow AC Chilled Ceilings Chilled Beams Fan Coil Units VAV Fan VAV Occupants BCO Guide Machines Spare Lighting 3m Continuous glazing Clear double glazing + internal blind 2m 1m 0.5m 3m High performance 66/34 glazing + internal blind 2m 1m 4m .5 Blind in ventilated cavity 4m 3m 2m 1m .5
    6. 6. Cooling Systems Total Cooling W/m 2 (perimeter areas) Cooling Loads Mechanical Engineering Façade/System Matching 20 40 60 80 120 140 160 180 100 200 220 Occupants BCO Guide Machines Spare Lighting 3m Continuous glazing Clear double glazing + internal blind 2m 1m 0.5m 3m High performance 66/34 glazing + internal blind 2m 1m 4m .5 Blind in ventilated cavity 4m 3m 2m 1m .5 Part L2 LWB Thermal Mass +Night Vent Natural Vent Upflow AC Chilled Ceilings Chilled Beams Fan Coil Units VAV Fan VAV
    7. 8. Typical New Build <ul><li>Natural Vent (mixed mode) </li></ul><ul><li>Minimal cooling </li></ul><ul><li>Reduced occupant energy demands </li></ul><ul><li>Change Expectations </li></ul>“ Best Practice” Beyond “Best Practice” Un-regulated at design: No change Energy Efficient Lighting / Controls: -25% Improved air/water distribution efficiency: -10% Enhanced Insulation / reduced hot water use: -25% Enhanced Façade (reduced cooling): -25% 15%
    8. 11. Grand Canal Square Offices
    9. 12. Two Buildings, both BREEAM Excellent, A3 BER
    10. 13. 100 kWhr/m2/yr
    11. 14. Energy Technologies – Cost Comparison € /t CO 2 saved € 1,500 € 1,250 € 1,000 € 750 € 500 € 250 € 0
    12. 15. Solar Water Heating
    13. 17. DSC vs. Silicon on Angle Effect
    14. 18. Beyond Zero Carbon
    15. 19. Biomass CHP
    16. 20. Biomass CHP 24% 100%
    17. 21. ` Reference Scenario ($60/bbl) High Oil Price Scenario ($120/bbl)
    18. 22. Assessing the financial benefits of potential interventions
    19. 23. Paul Dunne 21st May 2010 Low Carbon Building Solutions Thank You

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