Ofgem publishes raw data on the Scottish Renewables Obligation Certificates (SROCs) issued to renewable electricity generators (http://www.rocregister.ofgem.gov.uk/main.asp).
This data is re-analysed here in an accessible form on a site-by-site basis with other relevant publicly available information. The result is a series of easily understood information sheets for each RO accredited renewable generator in Scotland.
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Tue 27 May 2008
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Biomass can be burnt either on its own or with coal, to produce hot gasses, which in turn rotates the gas turbine which drives the shaft to produce electricity.
Performance data from biomass (dedicated & co-firing) accredited under the SRO:- 0.59 % of Scottish electricity in 2006 came from dedicated and co-firing biomass
- Average load factor for 2006 is 1% from combined dedicated and co-firing biomass but dedicated biomass generations achieved 49.3%
- Total SROCs claimed in 2006 was 210,700
(268 Kb)
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Tue 27 May 2008
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Water from catchments and reservoirs are channelled through a penstock that delivers the water to the turbine and drives the shaft which then produces electricity
Performance data from Hydro stations accredited under the SRO:- Please note that large hydro ( > 20 MW) is not eligible for SROCs, and they alone contributed 7.4% of Scottish electricity in 2006
- 5.4% of Scottish electricity in 2006 came from Hydro (< 20 MW)
- Average load factor for 2006 is 44%
- Total SROCs claimed in 2006 was 1,841,164
(1,447 Kb)
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Tue 27 May 2008
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Municipal waste (domestic and industrial waste) is buried and anaerobic digestion takes place at depth > 5m which will produce biogas that consist of mainly methane. The biogas is then burned to produce hot gases which in turn power a turbine and drives the shaft to produce electricity.
Performance data from landfill sites accredited under the SRO:- 1.03 % of Scottish electricity in 2006 came from landfill gas
- Average load factor for 2006 is 68%
- Total SROCs claimed in 2006 was 366,488
(484 Kb)
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Tue 27 May 2008
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Sewage sludge (concentrated solid phase) from waste water is treated in a sealed container known as a biodigester under mesophilic conditions at a temperature of approximately 35oC, and for between 15 to 30 days to produce biogas that contains mainly methane. The biogas is then burned to produce hot gases which power a turbine which then drives a shaft to produce electricity. The waste heat is then utilised to maintain the temperature required by the biodigester.
Performance data from Sewage gas accredited under the SRO system:- 0.15% of Scottish electricity in 2006 came from sewage gas
- Average load factor for 2006 is 61%
- Total SROCs claimed in 2006 was 5,413
(233 Kb)
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Tue 27 May 2008
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Movement of wind turns the wind turbine which then drives the shaft to produce electricity.
Performance data from wind farms accredited under the SRO:- 5.8 % of Scottish electricity in 2006 came from wind
- Average load factor for 2006 is 25%
- Total ROCs claimed in 2006 was 1,959,855
(702 Kb)
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