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Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
Waitrose Innovation Forum Presentation
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Waitrose Innovation Forum Presentation

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Presentation given by Chris Plackett of Farm Energy to Waitrose Innovation Forum Greenhouse Gas Subject Day on 17th Feb 2010

Presentation given by Chris Plackett of Farm Energy to Waitrose Innovation Forum Greenhouse Gas Subject Day on 17th Feb 2010

Published in: Technology, Business
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Transcript

  • 1. Energy efficiency in protected croppingChris Plackett<br />
  • 2. Things we do<br />Energy Services<br />Energy contract finder<br />Energy contract management<br />Advice & Consultancy<br />Energy audits<br />Project management<br />Climate Change Levy<br />Horticultural Agreement Administration<br />Near Market R&D<br />Development & field testing of new energy techniques<br />
  • 3. A few questions?<br />Why is energy efficiency important?<br />How efficient are we now?<br />How efficient can we get?<br />What tools can we use?<br />
  • 4. GHG Emissions Analysis<br />“The errors in national inventories of gaseous emissions from agriculture are typically about 30%” 1<br />1 Williams, A.G., Audsley, E. and Sandars, D.L. (2006) Determining the environmental burdens and resource use in the production of agricultural and horticultural commodities. Main Report. Defra Research Project IS0205. Bedford: Cranfield University and Defra<br />
  • 5. Why PC is different<br />
  • 6. PC’s success to date?<br />UK PC Horticulture’s energy saving record since 2004<br />22% energy saving<br />£34 million cost reduction<br />Data from Climate Change Levy<br />
  • 7. Current & future issues?<br />Energy costs<br />Volatility<br />Energy taxation<br />Carbon reduction incentives<br />‘Carbon Footprint’<br />Easy to calculate the impact of energy saving<br />Develop a sustainable business for the future?<br />Alternative energy systems<br />Move away from fossil fuels?<br />
  • 8. Review of energy prices<br />
  • 9. Future Prices – Gov’t projections<br />
  • 10. How efficient are we now?<br />
  • 11.
  • 12. Typical performance?<br />Boiler only sites*<br />Range 398 to 675 kWh/m2<br />‘Best Practice’ = 426 kWh/m2<br />Upper Quartile Average = 630 kWh/m2<br />Data from Climate Change Levy Returns.‘Whole business’ consumption for tomato only sites<br />What about a Dutch Nursery?<br />Range = 390 to 490 kWh/m2<br />
  • 13. Evolution<br />Refine our existing knowledge<br />Develop the tools we have now<br />Revolution<br />Sealed greenhouse systems<br />Advanced heating & cooling systems<br />Evolution or revolution?<br />
  • 14. Dutch project with tomatoes<br />250 kWh/m2/year gas use<br />60 kg/m2 yield<br />Mission accomplished in 2009<br />How?<br />Double / triple screens<br />“Relaxed” humidity control<br />Intelligent CO2 enrichment policy<br />“Alternative” CO2 sourcing<br />How far can we go?<br />
  • 15. Single screens only<br />‘Conservative’ with humidity control<br />Some progress on CO2 dosing<br />But where are the alternatives?<br />Particularly problematic with renewable energy<br />So evolution still has much to offer<br />But the returns are getting progressively smaller<br />What about the UK<br />
  • 16. Ducted Air Systems<br />Seen in sealed greenhouse<br />But have a role in conventional systems<br />Why?<br />More uniform greenhouse conditions<br />Quicker response<br />Save energy<br />More crop?<br />Evolving technology<br />
  • 17. HDC Project at Mill Nurseries, Humberside<br />Side by side comparison of 2 x 1 Ha greenhouse blocks<br />3 year project<br />Challenges!<br />Operation & control<br />Temperature uniformity<br />Electricity costs<br />Do they work?<br />
  • 18. 13% heat saving <br />59 kWh/m2 gas use reduction<br />7.6% yield increase<br />But……….<br />11 kWh/m2 additional electricity use<br />Double the electricity use in a conventional greenhouse<br />Temperature uniformity problems<br />Verdict …..the potential is on show, but can do better!<br />End of Term Report - Year 2<br />
  • 19. Ducted systems can make better use of lower grade heat sources<br />Important for alternative & renewable energy sources<br />Using lower grade heat<br />
  • 20. Where in the future?<br />Use less?<br />or <br />Generate?<br />
  • 21. Save it v Generate it<br />The business case; save or generate?<br />whatever is cheaper !<br />The environmental case; save or generate?<br />whatever is cheaper !<br /> So the case is just the same<br />“Exploiting the synergy between PC energy demands and alternative energy could be the key to a sustainable future…..”<br />
  • 22. Assess ‘whole life’ returns<br />
  • 23. The effect of energy price<br />Until recently energy prices have favoured energy efficiency<br />First came ROCs<br />Designed to increase the returns for renewable electricity generators<br />Now we have Feed in Tariffs (FIT’s) & the Renewable Heat Incentive (RHI)<br />Multiplying returns by up to 6x ?<br />
  • 24. Feed In Tariffs (FITs)<br />Disadvantage of ROCs<br />Seen to be for the ‘big boys’<br />Complex administration<br />Perceived lack of support for smaller projects<br />FITs<br />Simple<br />Stability / certainty of income<br />Start in April 2010<br />
  • 25. How FITs work<br />FIT paid on all of this<br />11kW Turbine<br />Generate <br />25,000kWh<br />Used on site<br />10,000kWh<br />Mains import<br />25,000kWh<br />Export to mains<br />15,000kWh<br />Mains import<br />15,000kWh<br />
  • 26. Proposed Generation Tariffs<br />
  • 27. Renewable Heat Incentive<br />Due to start April 2011<br />Will pay a tariff on heat generated<br />Banded rates based on technology<br />Consultation document published in January 2010<br />Designed to give ROI of 12% or better<br />
  • 28. Proposed RHI Rates<br />
  • 29. For larger sites<br />
  • 30. Biomass example<br />1MW boiler and ancillaries costing £250,000<br />Operating for 3,000 hours per year<br />Requires 700 Tonnes of woodchips / year (£75/t – 2.2p/kWh)<br />Cost = £65,000<br />Savings in gas purchase costs @ 2.0p/kWh<br />=£59,000<br />Benefit = - £6,000: Not viable<br />With RHI<br />@ 1.6p/kWh, RHI payments = £47,272<br />payback = 5.3 years<br />
  • 31. Management<br />We conveniently forget about maintenance and management <br />But Nothing is maintenance and management free<br />
  • 32. Pulling it together<br />The winner has always been energy efficiency<br />But returns are limited to a proportion of what you use<br />Law of diminishing returns applies<br />And NOW – the playing field has changed<br />Feed in Tariffs (FIT’s)<br />Renewable Heat Incentive (RHI)<br />
  • 33. Summary<br />Energy has a role for GHG savings for PC<br />It makes business sense<br />It makes environmental sense<br />It is the key to a sustainable future<br />Consider both energy saving and renewable generation technologies<br />Be realistic and even handed<br />Do your homework and consider whole life costs and returns<br />Think to the future – can energy get cheaper?<br />
  • 34. Thank you & any questions<br />

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