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Tilly shaw ets quick wins breakfast 21 nov 2017

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Tilly shaw ets quick wins breakfast 21 nov 2017

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Tilly shaw ets quick wins breakfast 21 nov 2017

  1. 1. Low Carbon South West Breakfast Workshop Light & Energy Tilly Shaw tilly.shaw@energy-ts.com 21 November 2017
  2. 2. 1 - Light and Energy in Buildings § In 2010 buildings accounted for 32% of total global final energy use. § This may double or triple by 2050, due to global demographic trends § The building sector has been shown to provide the greatest potential for delivering significant cuts in emissions at no cost Sources: 1-IPCC AR5-Working Group 3 – Ch9; 2-UNEP Sustainable buildings and climate initiative. Photo courtesy of aturkus / www.flickr.com under creative commons license.
  3. 3. 2 - Where is my energy going? I think we’re fairly energy-efficient, but how can I be sure? ü Record your energy use, in kWh/year and £/year ü Find the floor area for each type of space (for example server room, office space) ü Establish true operating hours and other potential “energy drivers” for your building ü Compare kWh/m2 to standard benchmarks, previous years, or similar buildings ...set up your energy baseline & compare to benchmarks
  4. 4. 3 – What does “good” look like? 0 100 200 300 400 500 600 Air conditioned office Naturally ventilated office Bank / Agency Small retail outlet - clothing Small retail outlet - food Kilowatt-hours per m2floor area, per year Electricity Gas
  5. 5. 4 – Where are the big wins? Air conditioned office - Electricity Use Catering Heating and Cooling Lighting Office Equipment ICT and Other Naturally ventilated office - Electricity Use Catering Heating and Cooling Lighting Office Equipment ICT and Other Bank / Agency - Electricity Use Heating and Cooling Lighting Office Equipment ICT and Other Source: CIBSE. Split by kilowatt-hours electric – (assumes space heating with gas)
  6. 6. 3 - Lighting: what could you save? 4 x 2ft T8 fluorescent panel 72W • Cost to upgrade to 36W LED ~ £50 each • Saving (office hours) ~ 75 kWh or £10 / yr 2 x 4ft T5 fluorescent tubes 56W • Cost to upgrade to 32W LED ~ £40 (re-lamp) • Savings (office hours) ~ 50 kWh or £5 / yr Halogen GU10 50W • Cost to upgrade to 7W LED ~ £10 each • Savings (office hours) ~ 90 kWh or £12 / yr Reviews have found that lighting retrofits in commercial buildings typically reduce lighting energy use by 30 – 60% (+ maintenance savings)
  7. 7. 4 - HVAC: what could you save? A review of commercial building retrofits found typical savings of 25-50% HVAC consumption, through upgrading equipment and controls (without changing the building envelope). Heating ventilation and cooling can be complex but there are some simple things everyone can ask about: 1. Is the plantroom equipment in “manual” or “in hand” mode? 2. Does heating and cooling occur at the same time in the same space? 3. Is the whole system adjusted to cope with a small problem area e.g. cold spots near a large window or doorway? If your answer to any of the above is “yes” then a review of controls and/or zoning is likely to be cost-effective.
  8. 8. THANK YOU Tilly Shaw Technical Energy Centre Operations Manager Energy & Technical Services tilly.shaw@energy-ts.com Tel: 01934 854 219 Mob: 07722 148 003

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