Sustainable Schools Renewable Energy Technologies. Andrew Lyle RD Energy Solutions

Transcription

1 Sustainable Schools 2009 Renewable Energy Technologies Andrew Lyle RD Energy Solutions

2 RD Energy Solutions Energy efficiency and renewable energy consultancy Project management of installations Maintenance of installations Specialist in wind, solar, hydro and biomass systems Established in 2004 Based in Edinburgh 3 directors and 15 staff BRE Accredited wind, solar and hydro installers Example relevant public sector projects: Wind & solar education packs for Midlothian schools 1.5 MW biomass boiler in NHS Scotland Wind turbines in Sanderson Wynd School, Tranent

3 Contents RD Energy Solutions UK Policy Electrical renewable technology options Wind Solar PV Heating renewable technology options Solar thermal Heat pumps Biomass heating Energy usage in schools and summary renewable applications Q&A

4 Policy and Context National targets to reduce carbon dioxide emissions 80% below 1990 levels by % UK CO 2 emissions from buildings Approximately 30,000 schools in the UK Energy spend estimated to be 350m Responsible for 15% of public sector CO 2 emissions New build planning guidelines Climate Change Act 2008: Carbon reduction commitment (CRC) Legally binding targets to reduce energy usage How can this be achieved? Energy efficiency measures Renewable technologies

5 Micro and Small Wind Turbines Extract kinetic energy in the wind Range from 0.1m to 20m rotor diameter Rooftop mounted or standalone Most suitable sites: Available space for installation Open and exposed (i.e. coastal or rural) Limitations: Must be windy! Suitable distance for noise Capital costs: 4k - 6k per kw Payback period: 8 years +

6 Micro and Small Wind Turbines

7 Micro and Small Wind Turbines

8 Solar Photovoltaics Converts light into DC electricity Range from 100 Watts to 100 kw + Modular system suitable for all scales of application Mounted facing south at approx 35 degrees Can be roof integrated or installed above the roof structure Most suitable sites: Any south facing or flat roof Limitations: None Capital costs: 5k - 8k per kw Payback period: 20 years +

9 Solar Photovoltaics

10 Solar Thermal Transfers solar heat to hot water systems Modular system suitable for all scales of application Mounted facing south at approx 35 degrees Can be roof integrated or mounted above the roof Most suitable sites: Any south facing or flat roof Low temperature hot water systems such as pools Limitations: Pre-heating stage only Capital costs: 600-1,000 per m 2 of panels Payback period: + 30 years in gas heating systems + 15 years in electric heating systems

11 Heat Pumps Transfers heat between environments Ground, water and air source systems Modular system suitable for all scales of application Most suitable sites: Low temperature heating applications < 45 C Buildings with heating and cooling requirements New build projects Limitations: Low temperature heating only Capital costs: 1k - 1.5k per kw installed Payback periods: + 30 years when offsetting gas heating + 10 years when offsetting electric heating

12 Heat Pumps

13 Heat Pumps

14 Biomass Heating Burns organic fuels to generate heat Woodchip, pellets or logs Range from domestic to large commercial applications Most suitable sites: Building utilisation > 70% Available space for fuel storage Limitations: Urban environments Resource availability Capital Costs: 0.4k - 1.5k per kw Payback period: 8-15 years

15 Biomass Heating

16 Energy Usage in Schools Energy usage: 84% fossil fuels and 14% electricity Energy costs: 60% fossil fuels and 40% electricity CO 2 emissions: 65% fossil fuels and 35% electricity Source: Carbon Trust Challenges for renewables: Seasonal pattern of usage Divide in type of usage Variation of types of schools (size, location, available space, etc) Technology knowledge Technology quality control Maintenance knowledge

17 Technology Summary Resource needs Advantages Most suitable sites and applications Wind Wind resource > 5.5 m/s (11mph) Very efficient in windy sites Windy sites (rural or coastal) turbines Exposure to prevailing wind directions Solar PV South facing or flat roof Very predictable Simple systems with no moving parts Universally applicable to all sites Solar thermal South facing or flat roof Low temperature hot water demand Suitable space for storage tank Very predictable Low maintenance Low temperature hot water applications, such as domestic hot water or swimming pools Heat pumps Space available for collection loop Low temp space heating demand Highly controllable Heating and cooling applications Low temperature space and water heating applications Building utilisation > 70% New build projects Biomass heating Fuel guaranteed on long-term contract Access and storage space for fuel Highly efficient All space and water heating applications Building utilisation > 70% Suburban or rural sites

18 Grant Funding Opportunities Carbon Trust Energy efficiency and renewables feasibility studies Interest free loans up to 100,000 for a 5-year period (energy efficiency and renewables) Available to businesses, public sector and charities Scottish Community and Householders Renewables Initiative Energy efficiency and renewables feasibility studies Capital grant funding up to 50% project value (all renewable technologies) Available to not-for-profit organisations Scottish Biomass Heating Scheme Capital grant funding towards biomass projects capped at 50% project value Available to small to medium scale enterprises Enhanced Capital Allowances 100% of capital cost deducted from taxable profits in the year of investment Available for energy efficiency products and renewable technologies

19 Thank You Andrew Lyle RD Energy Solutions Ltd SAC Bush Estate Edinburgh EH26 0PH Tel: Fax: Web: