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ENV-2A82/ENV-2A82K Low Carbon Energy Low Carbon Strategies at the University of East Anglia http://www2.env.uea.ac.uk/energy/energy.htm http://www.uea.ac.uk/~e680/energy/energy.htm Recipient of James Watt Gold Medal Keith Tovey (杜伟贤) M.A., PhD, CEng, MICE, CEnv 1 Low Carbon Strategies at the University of East Anglia • Low Energy Buildings and their Management • Low Carbon Energy Provision – Photovoltaics – CHP – Adsorption chilling – Biomass Gasification @ 15:00 Split into groups of 30 – 15:00 – 15:35 Group A do tour – 15:35 – 16:15 Group B (meet in ENV Foyer) – 16:15 – 16:55 Group C (meet in ENV Foyer) • The Triple Challenges of Climate Change, Energy Security and Cost 2 Original buildings Teaching wall Library Student residences 3 Nelson Court楼 Constable Terrace楼 4 Low Energy Educational Buildings Nursing and Midwifery Thomas Paine Study Centre School Medical School Phase 2 ZICER Elizabeth Fry Building Medical School 5 Constable Terrace - 1993 • Four Storey Student Residence • Divided into “houses” of 10 units each with en-suite facilities • Heat Recovery of body and cooking heat ~ 50%. • Insulation standards exceed 2006 standards • Small 250 W panel heaters in individual rooms. Electricity Use Carbon Dioxide Emissions - Constable Terrace 12% 21% 140 Appliances 120 Lighting 100 MHVR Fans MHVR Heating 18% Panel Heaters Hot Water 18% Kg/m2/yr 14% 80 60 40 20 0 17% UEA Low Medium 6 Educational Buildings at UEA in 1990s Queen’s Building 1993 Elizabeth Fry Building 1994 Elizabeth Fry Building Employs Termodeck principle and uses ~ 25% of Queen’s Building 7 The Elizabeth Fry Building 1994 Elizabeth Fry Binası - 1994 Cost ~6% more but has heating requirement ~20% of average building at time. Significantly outperforms even latest Building Regulations. Runs on a single domestic sized central heating boiler. Maliyeti ~%6 daha fazla olsada, ısınma ihtiyacı zamanın ortalama binalarının ~%20’si. En son Bina Yönetmeliklerini bile büyük ölçüde aşmaktadır. Tek bir ev tipi merkezi ısıtma kazanı ile çalışmaktadır. 8 2 Toplam Enerji Tüketimi (kWh/m /yıl) Conservation: management improvements Koruma: yönetimde iyileştirmeler 140 120 Heating/Cooling Hot Water Electricity 100 80 60 40 20 0 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Careful Monitoring and Analysis can reduce energy consumption. Dikkatli İzleme ve Analiz, enerji tüketimini azaltabilir. 9 Comparison with other buildings 250 gas electricity 150 2 kWh/m /yıl 200 Non Technical Evaluation of Elizabeth Fry Building Performance User Satisfaction 100 50 thermal comfort +28% 0 air quality +36% Energy Performance lighting +25% 120 100 80 60 40 20 0 noise +26% CO2/m2/yıl Elizabeth Fry Low Energy Average electricity gas Elizabeth Fry low energy A Low Energy Building is also a better place to work in. average Carbon Dioxide Performance 10 ZICER Building Won the Low Energy Building of the Year Award 2005 • Heating Energy consumption as new in 2003 was reduced by further 57% by careful record keeping, management techniques and an adaptive approach to control. • Incorporates 34 kW of Solar Panels on top floor 11 The ground floor open plan office The first floor open plan office The first floor cellular offices 12 The ZICER Building – Main part of the building • High in thermal mass • Air tight • High insulation standards • Triple glazing with low emissivity ~ equivalent to quintuple glazing 13 ZICER Building Won the Low Energy Building of the Year Award 2005 • Heating Energy consumption as new in 2003 was reduced by further 57% by careful record keeping, management techniques and an adaptive approach to control. • Incorporates 34 kW of Solar Panels on top floor 14 Operation of Main Building Mechanically ventilated that utilizes hollow core ceiling slabs as supply air ducts to the space Incoming air into the AHU Regenerative heat exchanger 15 Operation of Main Building Filter 过滤器 Heater 加热器 Air passes through hollow cores in the ceiling slabs 空气通过空心的板层 Air enters the internal occupied space 空气进入内部使用空间 16 Operation of Main Building Recovers 87% of Ventilation Heat Requirement. Space for future chilling 将来制冷的空间 Out of the building 出建筑物 The return air passes through the heat exchanger 空气回流进入热交换器 Return stale air is extracted from each floor 从每层出来的回流空气 17 Fabric Cooling: Importance of Hollow Core Ceiling Slabs Hollow core ceiling slabs store heat and cool at different times of the year providing comfortable and stable temperatures Warm air Winter Day Warm air Heat is transferred to the air before entering the room Slabs store heat from appliances and body heat. 热量在进入房间之前被传递 到空气中 板层储存来自于电器以及人 体发出的热量 Air Temperature is same as building fabric leading to a more pleasant working environment 18 Fabric Cooling: Importance of Hollow Core Ceiling Slabs Hollow core ceiling slabs store heat and cool at different times of the year providing comfortable and stable temperatures Cold air Winter Night Heat is transferred to the air before entering the room Slabs also radiate heat back into room In late afternoon heating is turned off. 热量在进入房间之前被传递到 空气中 板层也把热散发到房间内 Cold air 19 Fabric Cooling: Importance of Hollow Core Ceiling Slabs Hollow core ceiling slabs store heat and cool at different times of the year providing comfortable and stable temperatures Cool air Summer night Draws out the heat accumulated during the day Cools the slabs to act as a cool store the following day night ventilation/ free cooling 把白天聚积的热量带走。 冷却板层使其成为来日的冷 存储器 Cool air 20 Fabric Cooling: Importance of Hollow Core Ceiling Slabs Hollow core ceiling slabs store heat and cool at different times of the year providing comfortable and stable temperatures Warm air Summer day Slabs pre-cool the air before entering the occupied space concrete absorbs and stores heat less/no need for air-conditioning 空气在进入建筑使用空间前被 预先冷却 混凝土结构吸收和储存了热量 以减少/停止对空调的使用 Warm air 21 Energy Consumption (kWh/day) 能源消耗(kWh/天) Good Management has reduced Energy Requirements Space Heating Consumption reduced by 57% 1000 800 800 600 400 350 200 0 -4 -2 0 2 4 6 8 10 12 14 16 18 Mean |External Temperature (oC) Original Heating Strategy New Heating Strategy 原始供热方法 新供热方法 22 Life Cycle Energy Requirements of ZICER compared to other buildings 与其他建筑相比ZICER楼的能量需求 自然通风 221508GJ 54% 28% 51% 使用空调 384967GJ 34% 建造 209441GJ Materials Production 材料制造 Materials Transport 材料运输 On site construction energy 现场建造 Workforce Transport 劳动力运输 Intrinsic Heating / Cooling energy 基本功暖/供冷能耗 Functional Energy 功能能耗 Refurbishment Energy 改造能耗 Demolition Energy 拆除能耗 29% 61% 23 Life Cycle Energy Requirements of ZICER compared to other buildings 300000 ZICER 250000 Naturally Ventilated GJ 200000 Air Conditrioned 150000 100000 50000 0 0 5 10 15 20 25 30 35 40 45 50 55 60 80000 Years GJ 60000 Compared to the Air-conditioned office, ZICER as built recovers extra energy required in construction in under 1 year. 40000 20000 ZICER Naturally Ventilated Air Conditrioned 0 0 1 2 3 4 5 6 7 8 9 10 Years 24 Low Carbon Strategies at the University of East Anglia • Low Energy Buildings and their Management • Low Carbon Energy Provision – Photovoltaics – CHP – Adsorption chilling – Biomass Gasification • The Energy Tour • Energy Security: Hard Choices facing the UK 25 ZICER Building Photo shows only part of top Floor • Mono-crystalline PV on roof ~ 27 kW in 10 arrays 26 • Poly- crystalline on façade ~ 6.7 kW in 3 arrays Performance of PV cells on ZICER Wh % 100 100 Block1 90 90 Block 2 80 80 Block 3 70 70 Block 4 60 60 Block 5 50 50 Block 6 40 40 Block 7 30 30 Block 8 20 20 Block 9 10 10 Block 10 0 0 radiation 9 10 11 12 13 14 All arrays of cells on roof have similar performance respond to actual solar radiation 15 Time of day % Wh The three arrays on the façade respond differently 200 180 160 140 120 100 80 60 40 20 0 100 90 80 70 60 50 40 30 20 10 0 9 10 11 12 13 Time of Day 14 15 Top Row Middle Row Bottom Row radiation 27 Elevation in the sky (degrees) 20 18 16 14 12 10 8 6 4 2 0 120 8.00 9.00 150 10.00 180 210 12.00 13.00 14.00 Orientation relative to True North 11.00 15.00 240 16.00 28 Elevation in the sky (degrees) 25 January May September P1 - bottom PV row February June October P2 - middle PV row March July November P3 - top PV row April August December 20 15 10 5 0 6.00 7.00 8.00 9.00 10.00 11.00 12.00 Time (hours) 13.00 14.00 15.00 16.00 29 Low Carbon Strategies at the University of East Anglia • Low Energy Buildings and their Management • Low Carbon Energy Provision – Photovoltaics – CHP – Adsorption chilling – Biomass Gasification • Awareness issues • The Energy Tour • Energy Security: Hard Choices facing the UK 30 Arrangement of Cells on Facade Individual cells are connected horizontally Cells active Cells inactive even though not covered by shadow As shadow covers one column all cells are inactive If individual cells are connected vertically, only those cells actually in shadow are affected. 31 31 Use of PV generated energy Peak output is 34 kW 峰值34 kW Sometimes electricity is exported Inverters are only 91% efficient • Most use is for computers • DC power packs are inefficient typically less than 60% efficient • Need an integrated approach 32 Conversion efficiency improvements – Building Scale CHP 3% Radiation Losses 11% 61% Flue Flue Losses Losses 36% 86% Gas Localised generation makes use of waste heat. Reduces conversion losses significantly Exhaust Heat Exchanger Engine Heat Exchanger Generator 36% Electricity 50% Heat 33 UEA’s Combined Heat and Power 3 units each generating up to 1.0 MW electricity and 1.4 MW heat 34 Conversion efficiency improvements Before installation 1997/98 MWh electricity gas oil 19895 35148 33 Total Emission factor kg/kWh 0.46 0.186 0.277 Carbon dioxide Tonnes 9152 6538 9 Electricity After installation 1999/ Total CHP export 2000 site generation MWh 20437 15630 977 Emission kg/kWh -0.46 factor CO2 Tonnes -449 15699 Heat import boilers CHP oil total 5783 14510 28263 923 0.46 0.186 0.186 0.277 2660 2699 5257 256 10422 This represents a 33% saving in carbon dioxide 35 Conversion efficiency improvements Load Factor of CHP Plant at UEA Demand for Heat is low in summer: plant cannot be used effectively More electricity could be generated in summer 36 绝热 Heat rejected 高温高压 High Temperature High Pressure 节流阀 Throttle Valve Compressor 冷凝器 Condenser 蒸发器 Evaporator 低温低压 Low Temperature Low Pressure 压缩器 为冷却进行热提 取 Heat extracted for cooling A typical Air conditioning/Refrigeration Unit 37 Absorption Heat Pump 外部热 Heat from external source 绝热 Heat rejected 高温高压 High Temperature High Pressure 吸收器 Desorber 节流阀 Throttle Valve 冷凝器 Condenser 蒸发器 Evaporator 为冷却进行热提 取 Heat extracted for cooling 低温低压 Low Temperature Low Pressure 热交换器 Heat Exchanger W~0 吸收器 Absorber Adsorption Heat pump reduces electricity demand and increases electricity generated 38 A 1 MW Adsorption chiller 1 MW 吸附冷却器 • Uses Waste Heat from CHP • provides most of chilling requirements in summer • Reduces electricity demand in summer • Increases electricity generated locally • Saves ~500 tonnes Carbon Dioxide annually 39 The Future: Biomass Advanced Gasifier/ Combined Heat and Power • • • • • Addresses increasing demand for energy as University expands Will provide an extra 1.4MW of electrical energy and 2MWth heat Will have under 7 year payback Will use sustainable local wood fuel mostly from waste from saw mills Will reduce Carbon Emissions of UEA by ~ 25% despite increasing student numbers by 250% 40 Trailblazing to a Low Carbon Future Low Energy Buildings Photo-Voltaics CHP • Low Energy Buildings • Effective Adaptive Energy Management • Photo voltaic Generation • Combined Heat and Power • Absorption Chilling Efficient CHP Absorption Chilling Absorption Chilling • Advanced CHP using Biomass Gasification • World’s First MBA in Strategic Carbon Management Biomass 41 41 41 Trailblazing to a Low Carbon Future Efficient CHP 1990 2006 Students Floor Area (m2) 5570 138000 CO2 (tonnes) CO2 kg/m2 CO2 kg/student Absorption Chilling 14047 207000 Change since 1990 +152% +50% 2012 16000 220000 Change since 1990 +187% +159% 19420 140.7 21652 104.6 +11% -25.7% 14000 63.6 -28% -54.8% 3490 1541 -55.8% 875 -74.9% 42 42 42 43 The Triple Challenges of Climate Change, Energy Security and Cost 44 Energy Security is a potentially critical issue for the UK 140 Gas Production and Demand in UK Billion cubic metres 120 Only 50% now provided by UK sources. 100 80 Import Gap 60 Actual UK production 40 Actual UK demand Projected production Projected demand 20 Warning issued on 17th April 2012 that over-reliance on Norway and imported LNG from Qatar will lead to price rises by end of year 0 2002 Prices have become much more volatile since UK is no longer self sufficient in gas. 2006 2010 14 2014 2018 Wholesale Electricity Prices Langeled Line to Norway 12 Oil reaches $130 a barrel UK no longer self sufficient in gas 8 Severe Cold Spells 10 p/kWh 1998 6 4 2 45 0 2001 2003 2005 2007 2009 2011 2013 What are causes of rise in recent years? (1) • Since 2004 Electricity Bills for the average household have risen from ~ £230 to around ~£440 a rise of 90% * • Support for renewables in 2011 was £1285 million pounds. - or an increase of 0.39 p/kWh in retail price of electricity • Wholsesale prices have risen from 2p to 4.5 p/kWh over period because of increases in fossil fuel prices. • Renewables are only a very small reason for rise in Electricity Bills ~ only 8.7% of the 225% rise in wholesale prices • The main causes are increasing dependence on imported gas and profits?? by utility companies?? * Data from Quarterly Energy Prices from DECC Website 46 Our looming over-dependence on gas for electricity generation TWH (billions of units (kWh)) Version suitable for Office 2003, 2007 & 2010 600 500 400 300 • 1 new nuclear station completed each year after 2020. • 1 new coal station with CCS each year after 2020 • 1 million homes fitted with PV each year from 2020 - 40% of homes fitted by 2030 • 15+ GW of onshore wind by 2030 cf 4 GW now • No electric cars or heat pumps Imported Oil UK Gas Gas Offshore Wind Onshore Wind Existing Coal 200 Oil Other Renewables Existing Nuclear Existing Coal New Coal 100 Data for modelling derived from DECC & Climate Change Committee (2011) - allowing for significant deploymentExisting of electric vehicles and heat pumps by 2030.New Nuclear Nuclear 0 1970 Data for modelling derived from DECC & Climate Change Committee (2011) - allowing for significant deployment of electric vehicles and heat pumps by 2030. 1980 1990 2000 2010 2020 2030 Data for modelling derived from DECC & Climate Change Committee (2011) - allowing for significant deployment of electric vehicles and heat pumps by 2030. 47 What is the magnitude of the CO2 problem? 50 45 40 35 30 25 20 15 10 5 0 Developing EU Other OECD UK France Transition Oil Producing Pakistan India Namibia Brazil Turkey China Mexico Lithuania Sweden Switzerland France Ukraine South_Africa Libya Norway Italy Greece UK Denmark Japan Germany Russia Netherlands US UAE Qatar tonnes/capita How does UK compare with other countries? Why do some countries emit more CO2 than others? Per capita Carbon Emissions 48 Poland India Australia Libya China Italy 800 Czech Republic Other OECD USA Oil Exporting Denmark EU Portugal 1000 Developing Germany UK Netherlands Japan Spain UAE Qatar Luxembourg Belgium Austria France 600 Sweden Switzerland Norway gms CO2 / kWH Carbon Emissions and Electricity Carbon Emission Factor in Electricity Generation 1200 UK France 400 200 0 49 Options for Electricity Generation in 2020 - Non-Renewable Methods Potential contribution to electricity supply in 2020 and drivers/barriers 0 - 80% (at present 45- Available now (but gas 50%) is running out) Gas CCGT nuclear fission (long term) Energy Review 2002 9th May 2011 (*) 8.0p [5 - 11] ~2p + 0 - 15% (France 80%) - new inherently safe (currently 18% and designs - some 2.5 - 3.5p falling) development needed 7.75p [5.5 - 10] Installed Capacity (MW) notisavailable earliest Nuclearfusion New Build assumes one new station completeduntil each2040 year at after 2020.not until nuclear unavailable 2050 for significant impact 14000 12000 New Build ? [7.5 - 15]p Available now: Not Projected Coal currently ~40% but viable without Carbon unlikely "Clean10000 Coal" 2.5 3.5p Actual scheduled to fall Capture & before 2025 - ? 8000 Sequestration 6000 Carbon sequestration either by burying it or using methanolisation to create a new 4000 fuel will not be available at scale required until mid 2020s if then transport 2000 0 1950 1960 1970 1980 1990 2000 2010 2020 2030 2040 * Energy Review 2011 – Climate Change Committee May 2009 50 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and drivers/barriers On Shore Wind ~25% [~15000 x 3 MW turbines] available now for commercial exploitation 2002 (Gas ~ 2p) May 2011 (Gas ~ 8.0p) * ~ 2+p ~8.2p +/- 0.8p 1.5MW Turbine At peak output provides sufficient electricity for 3000 homes On average has provided electricity for 700 – 850 homes depending on year Future prices from * Renewable Energy Review – 9th May 2011 Climate Change Committee 51 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and drivers/barriers On Shore Wind Off Shore Wind ~25% [~15000 x 3 MW turbines] 25 - 50% available now for commercial exploitation some technical development needed to reduce costs. May 2011 2002 (Gas ~ 2p) (Gas ~ 8.0p) * ~ 2+p ~8.2p +/- 0.8p ~2.5 - 3p 12.5p +/- 2.5 Climate Change Committee (9th May 2011) see offshore wind as being very expensive and recommends reducing planned expansion by 3 GW and increasing onshore wind by same amount Scroby Sands has a Load factor of 28.8% - 30% but nevertheless produced sufficient electricity on average for 2/3rds of demand of houses in Norwich. At Peak time sufficient for all houses in Norwich and Ipswich 52 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and drivers/barriers On Shore Wind Off Shore Wind ~25% [~15000 x 3 MW turbines] 25 - 50% available now for commercial exploitation some technical development needed to reduce costs. May 2011 2002 (Gas ~ 2p) (Gas ~ 8.0p) * ~ 2+p ~8.2p +/- 0.8p ~2.5 - 3p 12.5p +/- 2.5 Micro Hydro Scheme operating on Siphon Principle installed at Itteringham Mill, Norfolk. Rated capacity 5.5 kW Hydro (mini micro) 5% technically mature, but limited potential 2.5 - 3p Future prices from Climate Change Report (May 2011) or RO/FITs where not otherwise specified 11p for <2MW projects 53 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and drivers/barriers May 2011 2002 (Gas ~ 2p) (Gas ~ 8.0p) * available now for On Climate Shore Change ~25% [~15000 x that 1.6 TWh (0.4%) might be Report suggests commercial ~ 2+p Wind 3 MW turbines] achieved by 2020 which is equivalent to ~ 2.0 GW. exploitation some technical Off Shore Wind development needed to ~2.5 - 3p 25 - 50% reduce costs. Hydro (mini micro) Photovoltaic 5% technically mature, but limited potential <<5% even available, but much further assuming 10 GW of research needed to bring down installation costs significantly ~8.2p +/- 0.8p 12.5p +/- 2.5 2.5 - 3p 11p for <2MW projects 15+ p 25p +/-8 Future prices from Climate Change Report (May 2011) or RO/FITs where not otherwise specified 54 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and drivers/barriers available now for On Shore Transport ~25%Fuels: [~15000 x commercial Wind 3 MW turbines] exploitation • Biodiesel? some technical Off Shore Wind development needed to 25 - 50% • Bioethanol? reduce costs. • Compressed gas from Hydro (mini technically mature, but methane from waste. 5% micro) limited potential Photovoltaic Sewage, Landfill, Energy Crops/ Biomass/Biogas <<5% even assuming 10 GW of installation ??5% May 2011 2002 (Gas ~ 2p) (Gas ~ 8.0p) * ~ 2+p ~8.2p +/- 0.8p ~2.5 - 3p 12.5p +/- 2.5 2.5 - 3p 11p for <2MW projects available, but much further research needed bring Totoprovide down costs significantly p electricity 25p +/-8 5%15+ of UK needs will require an area the size of Norfolk and Suffolk devoted solely to biomass available, but research needed in some areas e.g. advanced gasification 2.5 - 4p Future prices from Climate Change Report (May 2011) or RO/FITs where not otherwise specified 7 - 13p depending on technology 55 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and 2002 (Gas May 2011 drivers/barriers ~ 2p) (Gas ~ 8.0p) On Shore Wind ~25% available now ~8.2p +/- 0.8p ~ 2+p Off Shore available but costly 25 - 50% ~2.5 - 3p 12.5p +/- 2.5 Wind 11p for Small Hydro 5% limited potential 2.5 - 3p <2MW projects available, but very Photovoltaic <<5% 15+ p 25p +/-8 costly available, but research Biomass ??5% 2.5 - 4p 7 - 13p needed currently < 10 techology limited Wave/Tidal MW may be 1000 major development not Stream - 2000 MW before 2020 (~0.1%) 4 - 8p Future prices from Climate Change Report (May 2011) or RO/FITs where not otherwise specified 19p +/- 6 Tidal 26.5p +/- 7.5p Wave 56 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and 2002 (Gas May 2011 drivers/barriers ~ 2p) (Gas ~ 8.0p) On Shore Wind ~25% available now ~8.2p +/- 0.8p ~ 2+p Off Shore available but costly 25 - 50% ~2.5 - 3p 12.5p +/- 2.5 Wind 11p for Small Hydro 5% limited potential 2.5 - 3p <2MW projects available, but very Photovoltaic <<5% 15+ p 25p +/-8 costly available, but research Biomass ??5% 2.5 - 4p 7 - 13p needed currently < 10 techology limited Wave/Tidal MW may be 1000 major development not Stream - 2000 MW before 2020 (~0.1%) 4 - 8p Future prices from Climate Change Report (May 2011) or RO/FITs where not otherwise specified 19p +/- 6 Tidal 26.5p +/- 7.5p Wave 57 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and 2002 (Gas May 2011 drivers/barriers ~ 2p) (Gas ~ 8.0p) On Shore Wind ~25% availableSevern now Barrage/ ~8.2p +/- 0.8p ~ 2+p Mersey Barrages Off Shore available buthave costlybeen considered frequently 25 - 50% ~2.5 - 3p 12.5p +/- 2.5 Wind e.g. pre war – 1970s, 2009 11p for Severn Barrage 5-8% Small Hydro 5% limited potential 2.5could - 3p provide <2MW of UK electricity needs projects available, butInvery Orkney –15+ Churchill Barriers Photovoltaic <<5% p 25p +/-8 costly Output ~80 000 GWh per annum available, but research Sufficient for 13500 Biomass ??5% 2.5 - 4phouses 7in- 13p needed Orkney but there are only 4000 in currently < 10 technologyOrkney. limited - Controversy in bringing 19p +/- 6 Wave/Tidal MW may be 1000 major development not 4 - 8p Tidal 26.5p cables south. Stream - 2000 MW before 2020 +/- 7.5p Wave Would save 40000 tonnes of CO 2 (~0.1%) technology available but unlikely for 2020. Construction time ~10 years. Tidal Barrages 5 - 15% 26p +/-5 In 2010 Government abandoned plans for development Future prices from Climate Change Report (May 2011) or RO/FITs where not otherwise specified 58 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and 2002 (Gas May 2011 drivers/barriers ~ 2p) (Gas ~ 8.0p) On Shore ~25% available now ~8.2p +/- 0.8p ~ 2+p Wind Off Shore available but costly 25 - 50% ~2.5 - 3p 12.5p +/- 2.5 Wind 11p for Small Hydro 5% limited potential 2.5 - 3p <2MW available, but very Photovoltaic <<5% 15+ p 25p +/-8 costly available, but research Biomass ??5% 2.5 - 4p 7 - 13p needed currently < 10 MW technology limited Wave/Tidal 19p Tidal ??1000 - 2000 MW major development not 4 - 8p Stream 26.5p Wave (~0.1%) before 2020 Tidal Barrages Geothermal 5 - 15% In 2010 Government abandoned plans for development 26p +/-5 unlikely for electricity generation before 2050 if then -not to be confused with ground sourced heat pumps which consume electricity Future prices from Climate Change Report (May 2011) or RO/FITs where not otherwise specified 59 Options for Electricity Generation in 2020 - Renewable Potential contribution to electricity supply in 2020 and 2002 (Gas May 2011 drivers/barriers ~ 2p) (Gas ~ 8.0p) On Shore ~25% available now ~8.2p +/- 0.8p ~ 2+p Wind Off Shore available but costly 25 - 50% ~2.5 - 3p 12.5p +/- 2.5 Wind 11p for Small Hydro 5% limited potential 2.5 - 3p <2MW available, but very Photovoltaic <<5% 15+ p 25p +/-8 costly available, but research Biomass ??5% 2.5 - 4p 7 - 13p needed currently < 10 MW technology limited Wave/Tidal 19p Tidal ??1000 - 2000 MW major development not 4 - 8p Stream 26.5p Wave (~0.1%) before 2020 Tidal Barrages Geothermal 5 - 15% In 2010 Government abandoned plans for development 26p +/-5 unlikely for electricity generation before 2050 if then -not to be confused with ground sourced heat pumps which consume electricity Future prices from Climate Change Report (May 2011) or RO/FITs where not otherwise specified 60 Our Choices: They are difficult Do we want to exploit available renewables i.e onshore/offshore wind and biomass?. Photovoltaics, tidal, wave are not options for next 10 - 20 years. [very expensive or technically immature or both] If our answer is NO Do we want to see a renewal of nuclear power ? Are we happy with this and the other attendant risks? If our answer is NO Do we want to return to using coal? • then carbon dioxide emissions will rise significantly • unless we can develop carbon sequestration within 10 years UNLIKELY – confirmed by Climate Change Committee [9th May 2011] If our answer to coal is NO Do we want to leave things are they are and see continued exploitation of gas for both heating and electricity generation? >>>>>> 61 Our Choices: They are difficult If our answer is YES By 2020 • we will be dependent on GAS for around 70% of our heating and electricity imported from countries like Russia, Iran, Iraq, Libya, Algeria Are we happy with this prospect? >>>>>> If not: We need even more substantial cuts in energy use. Or are we prepared to sacrifice our future to effects of Global Warming? - the North Norfolk Coal Field? Do we wish to reconsider our stance on renewables? Inaction or delays in decision making will lead us down the GAS option route and all the attendant Security issues that raises. We must take a coherent integrated approach in our decision making – not merely be against one technology or another 62 What about Renewable Energy Options for the future? Energy Generation •Solar thermal - providing hot water - most suitable for domestic installations, hotels – generally less suitable for other businesses Output for a 1.25kW PV Array Example 2 panel ( 2.6 sqm ) in 5 2011– generates Norwich 2012 4 826kWh/year (average over 7 years). 3 • The more hot water you use the 2 more solar heat you get! • Renewable Heat Incentive 0 available from Energy 2013 Gain Overall Solar Average Daily Output (kWh) • 1 kWh per day Jan Mar May Jul Sep Nov 5.0 2007 2008 4.5 •Solar PV – providing electricity - suitable for all sizes of installation 2009 2010 4.0 2011 2012 3.5 from ~ 5.5 to 8.5 sqm • Area required for 1 kW peak varies 3.0 depending on technology and manufacturer 2.5 2.0 • Approximate annual estimate of generation 1.5 1.0 = installed capacity * 975 kWh 0.5 0.0 Or just under capacity * 1000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 63 Conclusions • Hard Choices face us in the next 20 years • Effective adaptive energy management can reduce heating energy requirements in a low energy building by 50% or more. • Heavy weight buildings can be used to effectively control energy consumption • Photovoltaic cells need to take account of intended use of electricity use in building to get the optimum value. • Building scale CHP can reduce carbon emissions significantly • Adsorption chilling should be included to ensure optimum utilisation of CHP plant, to reduce electricity demand, and allow increased generation of electricity locally. • Promoting Awareness can result in up to 25% savings • The Future for UEA: Biomass CHP Wind Turbines? "If you do not change direction, you may end up where you are heading." Lao Tzu (604-531 BC) Chinese Artist and Taoist philosopher 64