Solar PV in Agriculture: on your roofs and in your fields? Paul Cottington (NFU)
Farm Wind Energy - David Roe (IEP)
1. Sustainable Energy
Overview
Wind Energy
Presented by:
David Roe CEnv IEng MIAgrE
Chartered Environmentalist and Consulting Engineer
IEP Ltd
Sustainable Energy & Water david.roe@iep‐environment.com
8. Wind Speed
• National database for smaller project
NOABL is recognised for MCS certified installations
• Bench mark monitoring for medium scale
3 months mast results compared with local database
• Full monitoring
12 – 24 months mast monitoring at multi levels
The performance of wind turbines is impossible to predict with certainty due to
the variability of wind from location to location and from year to year. This
estimate is given as guidance only and should not be considered as a
guarantee. For a greater level of certainty it is recommended that on site wind
speed monitoring is carried out and results are compared to a local reference
site.
10. Which Wind Turbine?
• Matching output to requirement
• Energy, Carbon Offset or Financial criteria?
• Own use plus export connects your side of the meter
• Export only from larger turbines
• Specify kWhrs/year not kW rating!!!!!!!!
11. Maximum Yield – The Basics
• Wider rotor diameter = more
swept area = more energy
• Taller mast = higher wind speed =
more energy
• Durable design = more time at
work = more energy
• Match turbine/s to wind speeds
• More energy = more income
16. Grants – RDPE & Others
Where FIT’s or RHI subsidies are claimed it is improbable that grants can also be claimed.
The clearest statement so far is:
“Where a project is otherwise eligible for RHI support but has received or receives a
central Government grant, we may require that such grant monies be paid back in
order for the project to be eligible for RHI support. As stated in the RES, we will not
require this for grants received at the domestic level before the start of the RHI. At this
level, householders will not have to pay back central Government grants in order to
receive RHI support. RHI eligibility will also not be limited where grants other than
those funded by central Government (i.e. European or local grants) are taken up.
However, in all these situations, State Aid limitations may nevertheless restrict the
extent to which generators would be able to combine RHI support with grant
support.”
RHI Consultation 1st Feb 2010 ‐ Page 64
18. Financial Income Comparison
Owned or by Others?
• Utility wind farm owned by others:
£15‐25,000 /turbine/annum
• Single 250kW turbine owned by landowner:
£73,000 /turbine/ annum (less cost of capital)
• Income from 3 or 4 wind farm turbines belonging to others =
income from 1 x 250kW turbine belonging to land owner
19. Financial Illustrations ‐ Small
11kW Turbine
Guide price for project ‐ £60,000
Output estimate ‐ example:
• 30,000kWhrs/year from 5.5m/s average annual wind
speed at 18.3m hub height saving around 17t of CO2
emissions.
• Savings generated for own use: 12p/kWhr
• Income from export to grid: 3p/kWhr
• FIT: 26.7p/kWhr
• Annual maintenance cost : £600
20. Output Budget – Small
All exported:
30,000 x £0.297 = £8,910 /year
All used:
30,000 x £0.387 = £11,610 /year
Subtract £600/year maintenance
Simple Payback: (no inflation or Interest)
Exported: £60,000/£8,910 = 6.75 yrs
Used: £60,000/£11,010 = 5.5 yrs
Income during 20 years:
Exported: £118,200
Used: £160,200
21. Output Budget – Medium
250kW Turbine
• Guide cost £500,000 installed
• 352,000kw/hrs/year from 5.4m/s at hub.
Saving 197t CO2
Export: 352,000 x (18.8p + 3p) = £76,736
Used: 352,000 x (18.8 + 10p) = £101,376
Subtract maintenance : est. £3,500/yr
Simple payback: 5.2 to 6.9 years
Income during 25 years:
Export: £1,830,900
Used: £2,446,900
22. Output Budget – Large
2mW Turbine
• Guide cost £2,600,000 installed
• 5,000 mw/hrs/year from 6.5m/s average
wind speed at 45m saving 2,700t CO2
• Sales £39, ROC’s £35, Recycle £16, LEC £4.24
• Costs: O&M yr 1‐5 £12,000, yrs 5+ £24,000
Insurance £4k, Bss. rates est. £10k
• Income ‐ 5,000,mW x £94.24 = £471,200
Costs: yrs 1‐5 = £26,000, yrs 5+ £38,000
Simple payback early in 6th year
Benefit after 25 years £8,290,000