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Renewable Energy Study Worcestershire

Renewable Energy Study Worcestershire. Duncan Brewer Senior Engineer. Aim and scope of Study. Establish the realistic potential of large scale renewable generation in the County. Large Scale Renewables; Hydro: >50 kWe Wind: > 250 kWe Biomass: >500 kWe or >45 kWt. Methodology. Scenarios.

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Renewable Energy Study Worcestershire

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  1. Renewable Energy StudyWorcestershire Duncan Brewer Senior Engineer

  2. Aim and scope of Study • Establish the realistic potential of large scale renewable generation in the County. • Large Scale Renewables; • Hydro: >50 kWe • Wind: > 250 kWe • Biomass: >500 kWe or >45 kWt

  3. Methodology

  4. Scenarios Scenario 1 Conservative approach, no substantial barriers and no policy change. Scenario 2 Pragmatic approach, assumes more favourable planning and economic circumstances. Scenario 3 Most optimistic scenario, no barriers to site development, all resource will be utilised. Unlikely to be achieved.

  5. Biomass

  6. Use Electricity Heat Combined Heat and Power (Transport) Conversion technologies: Direct Combustion Gasification Anaerobic Digestion Pyrolysis

  7. Methodology • Determine available resource • Assumptions on how much of resource available for biomass energy • Potential energy calculated using calorific value of each biomass resource • Energy output dependant on usage – electricity, heat, CHP

  8. Typical Domestic Energy Usage Total Energy consumption ~ 23,300 kWh per home per year.

  9. 13,445 hectares of woodland consisting of 707 woods Dry annual mass available for energy: 1559t Calorific value:19GJ/t Woodland and Forestry Energy output: Electricity: 750 homes Heat: 355 homes CHP: 304 homes

  10. Arable and set-aside land suitable Short Rotation Coppice calorific value 19 GJ/t Miscanthus calorific value 17GJ/t Potential for energy = 29016t Energy Crops Energy output: Electricity: 13420 homes Heat: 6361 homes CHP: 5450 homes

  11. Straw • Used as bedding, feed for livestock, ploughed into soil as fertiliser and for energy. • Estimated surplus in Worcestershire • Potential for energy = 58095t • Calorific value 14 GJ/t Energy output: Electricity: 20555 homes Heat: 9743 homes CHP: 8347 homes

  12. 735 cattle holdings, 142 pig holdings, 485 poultry holdings Potential for energy production = 140846t Anaerobic Digestion Animal Manure & Poultry Litter Energy output: Electricity: 3063 homes Heat: 1089 homes CHP: 878 homes

  13. Potential energy

  14. Resource Utilisation • Unlike hydro and wind technologies, biomass site of less importance - therefore number of areas appropriate for biomass development identified rather then specific sites • Site Specifications; • Brownfield site where possible • Close to fuel source • Space - typically a 1.5 MW plant requires 0.5 hectares of land • Access for fuel deliveries and good transport links – typically a 2.5MW plant requires 25 deliveries/wk (38t lorry) • Access to water for cooling for large biomass plants (>20MW) • Grid connection • District heating connection (if CHP plant)

  15. Potential Areas

  16. Wind

  17. Wind - resource

  18. Wind resources • NOABL Wind Speed database at 45m above ground level • Sites with wind speeds >6m/s considered. • Ideally sites with wind speeds > 7m/s most favorable

  19. Wind - Constraints • (Wind resource) • Local topography • Land Designations: AONB, SSSI’s, SAC’s • Common land, green belt • Scheduled ancient monuments • Topple distance to major arteries • Air traffic and electromagnetic interference • Communication and microwave links • 50m buffer zone to footpaths, 350m buffer zone to dwellings • Access

  20. Wind – Potential Resource • 27 potential sites identified and prioritised • Considered small 250kW, medium 1.5MW and large 2.5MW wind turbines due to access considerations

  21. Wind summary

  22. Potential Wind Sites

  23. Hydro • Low head (1-3m drop) • Flow (greater than 0.5 m3/s) • Worcester suites run of river type installations • Existing structures • Weirs • Locks • Access • Flood risk • Land availability • Grid connection • Environment • Listed structures

  24. Hydro • 7 potential sites • 3 River Avon • 4 River Severn • 1 River Teme • Hydro has the least resource of the 3 resources examined in the study • Total hydro potential 3.4 MW (wind ~83MW)

  25. Main rivers of Worcestershire

  26. Potential hydro sites

  27. Total estimated renewable energy generation per scenario for all 3 renewable resources

  28. In context • Worcestershire Climate Change Strategy • 155 GWh attainable given resource • Unlike by 2011 given developments in excess of 2 years • National target of 15% renewables • Worcestershire County is unable to attain this target with the renewable resource available within the County.

  29. Moving forward • Develop attainable staged renewable targets • Supported policies within • Local development framework • Community strategies • Economic development plans • Environmental strategies • Forestry frameworks • Training and promotional activities (understanding issues) • Development of local expertise • Development of exemplar projects (County Council Land) • Collaboration between authorities • Consistency in long term policy

  30. Summary • Worcester has a renewable energy resource Most resource Wind Biomass Least resource Hydro • Realistic County renewable energy target • 3.5% total energy by 2026 • Suggest staged targets

  31. Any questions

  32. Thank you Duncan Brewer - duncan.brewer@itpower.co.uk

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