Oswestry Energy Fair - Ian Draisey


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Oswestry Energy Fair - Ian Draisey

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Oswestry Energy Fair - Ian Draisey

  1. 1. Microgeneration Ian Draisey
  2. 2. Based in Machynlleth, Mid Wales This year celebrating our 23 rd anniversary Worker owned company Work internationally in Renewable Energy Currently employ 32 people
  3. 3. Which renewables do we install?
  4. 4. Why renewable energy/microgeneration? Why now? ‘ The issue of climate change is now absolutely critical, indeed - I think, long term, it is probably the single most important issue we face as a global community’ Tony Blair, Bonn, June 2004
  5. 6. Building Regulations From April 2006 will specify that buildings over 1000m2 have to meet a notional 10% energy contribution from low or zero carbon technologies or additional energy efficiency measures Micro Generation Strategy Low Carbon Buildings Programme
  6. 7. Changing legislation and regulation 10% rule – where? Adopted Included in draft plan In the process of considering Merton Croydon Leicester City Council Ealing Belfast Waltham Forest Newcastle Bromley Liverpool Barking & Dagenham Edinburgh North Devon Waveney Sefton Sedgefield Oldham Derby Westminster Charnwood BC Norwich Brighton & Hove
  7. 8. More reasons Meeting sustainability targets Very visual PR – being seen to be green Looks great Saves on energy costs Sell green electricity
  8. 9. The many solutions 1) Solar Water Heating 2) Solar Space Heating 3) Solar Photovoltaic (PV) 4) Biomass e.g – straw, forestry products & energy crops 5) CHP 6) Ground source heat pumps 7) Small Scale Wind Renewable Energy - What do we mean ? Electricity or Heat Generated from non nuclear, non fossil fuelled resources
  9. 10. Renewable energy can provide 10% of any developments energy needs if it is appropriately designed from the start New build Improvements to existing buildings Retrofitting
  10. 11. Microgeneration How can energy be generated locally? Either each home could have it’s own micro generator e.g. – PV, solar water, solar space or pellet/log burner/boiler or all homes could be connected to a central installation e.g. – DHN, CHP or large turbine
  11. 12. Solar Water Heating Schematic diagram of a domestic solar thermal system
  12. 13. Solar Space Heating A new and exciting technology
  13. 14. Solar Photovoltaic
  14. 15. Grid connected solar photovoltaic - How it works
  15. 16. Basic requirements for solar water, space heating and photovoltaic Roof orientation – optimum output for South-facing (East/West generates ~ 80% optimum) Shading – beware of trees, chimneys, surrounding buildings & remember low solar angle in winter/early morning/late evening – 30 – 45 degrees optimum. Shading one cell restricts the output of the whole module Roof area available – typical sizing for solar thermal is 1-2m ² per person and for PV, a 1 kWp requires approx 8m2 of roof space
  16. 17. Biomass Energy Crops Forestry products Industry bi-product
  17. 18. Heat Only Options <ul><li>KWB 10-100 kW </li></ul><ul><li>Froling 150-500kW </li></ul><ul><li>Compte 320-4500 kW </li></ul><ul><li>Range in size from as low as 10kW’s to several MW’s </li></ul><ul><li>Can use a range of fuels </li></ul><ul><li>Modern sophisticated technology from the continent </li></ul><ul><li>Efficiencies of up to </li></ul><ul><li>80-90% at full load </li></ul>
  18. 19. Biomass basic requirements Heat load Fuel type/quality Fuel supply Fuel storage/drying Fuel feed mechanisms Location of boiler
  19. 20. Where have these systems been installed? <ul><li>Worcester County Hall – 700kW </li></ul><ul><li>Llanwddyn – 500kW </li></ul><ul><li>National Botanic Gardens – 165kW </li></ul><ul><li>Atlantic College – 1.2 MW </li></ul><ul><li>CAT – 50kW </li></ul><ul><li>Steilexo – 300kW </li></ul><ul><li>Crymych 490kW </li></ul><ul><li>Clynfyw 42kW </li></ul><ul><li>Pembs National Park office – 120kW </li></ul><ul><li>Groundwork Bridgend – 42kW </li></ul><ul><li>Llandyssul – 260kW </li></ul><ul><li>Nant Yr Arian – 40kW </li></ul>
  20. 26. Small Scale Wind
  21. 27. The Acceptability Factor <ul><li>Low noise </li></ul><ul><li>Low visual impact </li></ul><ul><li>Low maintenance </li></ul><ul><li>Long service life </li></ul><ul><li>Easy installation </li></ul>
  22. 28. Uses of Power <ul><li>Grid connect systems </li></ul><ul><li>Battery / Inverter systems </li></ul><ul><li>Supplementing power from diesel generators and photovoltaics </li></ul><ul><li>Direct powering of heating or pumping water </li></ul>
  23. 29. How Much Power? <ul><li>Site dependent </li></ul><ul><li>Typical urban inland site </li></ul><ul><li>660 kW hours per year </li></ul><ul><li>About one fifth of a typical family’s household electricity </li></ul><ul><li>Abates 0.27 tonnes of CO 2 annually </li></ul><ul><li>Coastal or hill top site turbine could produce 1200 kW hours per year </li></ul>
  24. 30. Schools, hospitals & LA’s Shrewsbury & Askham Powys County Council Welsh Health Estates Norfolk Health Estates Ysgol Gwaun Cae Gurwen Brent School
  25. 31. Ian Draisey [email_address] www.dulas.org.uk 01654 705000