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Thinking about Energy Efficiency

Thinking about Energy Efficiency. David Thorogood Environmental Strategy & Development Manager East Herts Council. Why energy efficiency? Check your energy efficiency Key actions Community Energy. Climate Change. Likely Future trends in Hertfordshire 2041-60 (low to medium scenario):

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Thinking about Energy Efficiency

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  1. Thinking about Energy Efficiency David Thorogood Environmental Strategy & Development Manager East Herts Council

  2. Why energy efficiency? • Check your energy efficiency • Key actions • Community Energy

  3. Climate Change Likely Future trends in Hertfordshire 2041-60(low to medium scenario): • Daily max summer temp: 3 to 6 degree rise over 30 yr mean • 5 day winter rain accumulation : 6 to13mm over 30 yr mean • Max summer typically 30°C. Hottest day around 35°C. Longer heatwaves • Increase extreme events drought / flood/ wind/ snow? • Water Abstraction demand: 150 to 200% of current (UK Cttee on Climate Change Risk Assessment 2017)

  4. Climate Change • Climate Change Act set UK emissions reduction 80% by 2050 (1990 base) • UK has achieved 35% cut but heading off track • Domestic/commercial emissions will need further year on year 3% drop • So significant action needed • Adds to pressure on price

  5. Fuel Costs • Generally upward price rise in all fuel types over time • Some stability this year • But is this about to change? • Significant rises still looking likely next year

  6. What? • Need to take stock • Review your energy use • Look to the future “If you can’t measure it, you can’t manage or improve it.”

  7. How? • Audit your energy use • Take regular meter readings (Smart?) • Assess overnight energy use • Check your tariff! • Off gas? Oil club • Benchmark & seek advice • Remember the energy hierarchy: • Switch off and save • Tariff/ Insulate/ equipment efficiency • Then consider alternative energy

  8. Smart MetersGovernment mandated installation by energy suppliers of smart energy meters in all domestic and smaller non-domestic premises by 2020

  9. Behaviour Change Review heating/cooling time Reduce temp when possible Stop manual override Reduce lighting load – switch off and more efficient luminaires Keep up to date with maintenance

  10. Heating • Do you have effective/any controls? • Check timings • Effective insulation • Reduce thermostat by 1 degree • Check system balanced • Weather dependant time switches • Modern boilers – now 90% efficient • TRV’s • App based control • Cooling?

  11. Hot Water • Hot water • set to 60 degrees • check timings • aim for water to run out at end of day • smaller cylinder/ instantaneous? • even the tea urn!

  12. Lighting • Assess wattage and needs • Any incandescent bulbs? • Fluorescent good (T12/T8/T5), but LED much better • 50% less energy/ 5-10 times longer (reduced maintenance) /3-7 yr pay back • Use PIRs for infrequent areas • Costly Flood lighting? - switch to LED

  13. Insulation

  14. Insulation • Loft insulation: £5/m2 = 1-2yrs • Cavity wall insulation: £5/m2 = 2-3yrs • Suspended Floor insulation: £5-£10/m2 = 5-10 years • Flat roof insulation (internal/external): Expensive and often best done as part of roof refurbishment £15/m2 = 15+yrs • Solid wall internal/external: £20/£45per m2 =12-20 yrs • Double Glazing :Generally only cost effective when replacing old windows £250+/m2 = 20+years • Tank jackets/pipes/draught proofing: always makes sense

  15. Thermal Imaging Camera

  16. Look to the future • Renewables - costs falling; - range of technologies inc solar; heat pumps; biomass and micro CHP • Battery storage – perhaps the next big thing? • EV charging hubs

  17. Grants Carbon Trust: Green Business Fund • Up to £10,000 to put towards the purchase and installation of energy efficient equipment • Expected savings must exceed project costs in 5 years max • Must have charitable status • Equipment should be purchased from Green Business Directory supplier East Herts Council • Community Capital Grants • Leaf Grants ACRE • Rural Community Buildings Loan Fund (Loans up to £20K)

  18. Community Energy • Government 2015 Community Energy Strategy • Collective action to reduce, purchase, manage & generate energy • Emphasis on local engagement, community control, local benefits • 3 aims: • Maintain energy security/tackle climate change • Saves people money . • Encourages wider social/economic benefits inc community cohesion

  19. Community Energy “Community energy is all about people and communities working together to save, generate, purchase, and manage energy, with local people benefiting from the power produced or saved.”

  20. Community Energy Locally: • Herts CE network to bring groups together • Work with schools to promote concept • 310 possible community assets for PV in East Herts = possible 119,000kW generating potential • Hertford Energy Now – 3 schemes@ Mill Meads; Hunsdon; Morgan schools

  21. A decade of growth • In 2005 fewer than 20 community energy projects • Now 30x that number! • In Germany c.65% of its huge renewable energy capacity is community-owned. • UK community ownership is less than 10% Total share of electricity generation from renewables over 25%

  22. Contact: David Thorogood 01992 531621 david.thorogood@eastherts.gov.uk www.eastherts.gov.uk

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