Developing the business case in Bristol City Council: Specific considerations for public sector<br />Paul Barker, <br />Energy Management Officer<br />
Reducing Carbon Emissions<br />BCC CO2 reduction target<br />40% by 2020<br />BCC emissions around 60,000 tonnes<br />Schools, leisure centres, offices, museums, etc<br />40% reduction equates to 2,000 tonnes per annum or<br />2,000 3kW PV Systems per year OR<br />10 500kW biomass boilers per year OR<br />Much cheaper £/tonne energy efficiency!<br />
Biomass boilers in Bristol<br />Blaise Nursery – 1st biomass boiler in Bristol in 2006 supplied from council’s own tree surgery waste<br />Incorporating a wood fuel station to process tree surgery waste into wood fuel for further Bristol biomass boiler installations<br />Installation of biomass boilers as part of BSF School refurb and retrofit to other sites<br />Bristol by end of 2011 will have the largest biomass boiler cluster in the SW and 2nd largest in England<br />Using own Wood fuel supply from own resources, to expand use of biomass boilers at the lowest cost<br />
Expanding wood fuel supply in the West<br />Own resources<br />Developing Blaise into a site capable of processing all forms of LA wood waste into wood fuel<br />
The Game Changers? – FIT and RHI and the business case<br />Capital investment reduced due to government spending review<br />Use of Prudential Borrowing and other long term borrowing needed to meet CO2 target<br />Using FIT and RHI to repay borrowing<br />
Case Study 1 – Small PV<br />3.9kW unit - Cost: £15,600 (£4,000 per kWp)<br />FIT repayments - £1,300 per annum<br />Energy generation saving - £200 per annum<br />Simple Payback – 10.5 Years<br />With borrowing @5.5% – 16 years<br />BCC payback (with free elec for school) – 20 years<br />BUT over 25 years if include cleaning, inverter replacement, drop in performance <br />CO2 saving – 1.5 tonnes<br />Cost per tonne of CO2 – £10,080<br />
Case Study 3 – Biomass<br />300kW unit Cost: £450,000 <br />RHI repayments - £20,000 per annum<br />Energy generation saving (oil to wood fuel) £23,000 per annum<br />Simple Payback – 10 Years<br />With borrowing @5.5% – 16 years<br />Includes cleaning and servicing<br />CO2 Saving – 180 tonnes<br />Cost per tonne of CO2 - £2,500<br />
BCC Plan of Action<br />Solar PV on Schools Programme<br />£1 million of Prudential Borrowing<br />Free PV with free Elec to school BUT school must:<br />Agree to install energy efficiency measures<br />Agree to energy awareness programme with staff and pupils<br />Hope to see savings of 25 tonnes per Primary School rather than 2-5 tonnes if PV only<br />
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