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1 Recipient of James Watt Gold Medal Keith Tovey ( ) : Reader Emeritus in Environmental Sciences, UEA Rotary District 1080 Environment Officer Eaton Village.

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Presentation on theme: "1 Recipient of James Watt Gold Medal Keith Tovey ( ) : Reader Emeritus in Environmental Sciences, UEA Rotary District 1080 Environment Officer Eaton Village."— Presentation transcript:


2 1 Recipient of James Watt Gold Medal Keith Tovey ( ) : Reader Emeritus in Environmental Sciences, UEA Rotary District 1080 Environment Officer Eaton Village – 6 th October 2012 The Challenges facing the UK in Energy Energy Security; Climate Change; Affordability What we can do to reduce impact of rising energy prices

3 2 We are all concerned about the Price of Energy. Why are prices so much more variable than in the past? Is it true that renewable energy support is the cause of these price rises? How are our bills made up? What are the omens for the future? What can we do? – general points What is the best strategy for your own household?

4 3 Import Gap Energy Security is also a potentially critical issue for the UK Gas Production and Demand in UK Less than 50% now provided by UK sources. Much now supplied by LNG from Qatar which has to pass through Straights of Hormuz. Price paid is in competition with other countries – especially China Prices have become much more volatile since UK is no longer self sufficient in gas. UK no longer self sufficient in gas Langeled Line to Norway Oil reaches $130 a barrel Severe Cold Spells Average wholesale price in 2012 ~ 4.5 p / kWh max ~ 10.9 p/kWh min ~ 2.8 p/kWh

5 4 What about energy Prices – how have they changed? In recent years, electricity retail prices have varied much less than wholesale prices and have also risen less. In Real Terms, Domestic Electricity Prices have only recently returned to 1981 levels

6 5 What are causes of rise in recent years? (1) Since 2004 Electricity Bills for the average household have risen from ~ £230 to around ~£440 at end of last year a rise of 90% * Support for renewables in 2011 was £1285 million pounds. But overall 325 billion kWh was generated So increase in wholesale price as a result of renewables = 0.39 p/kWh But wholsesale price has risen from 2p to 4.5 p/kWh over period because of increases in fossil fuel prices. Renewables have caused an increase of 8.7% of the 225% rise in wholesale prices Or account for 3.04% of current retail prices of which just 1.5% is attributed to support for Wind Energy. Renewables are only a very small reason for rise in Electricity Bills The main causes are increasing dependence on imported gas and profits?? by utility companies?? * Data from Quarterly Energy Prices from DECC Website

7 6 What are causes of rise in recent years? (3) Environmental Issues In 2011, ~ 160 million tonnes of CO 2 were emitted in power stations. Currently under the EU-Emission Trading System the cost of CO 2 is around 8 Euros a tonne or £6.4 Total cost of carbon emitted in power stations is just over £1 billion pounds or 0.29p/kWh on whole sale price representing ~2.5% of household energy prices. Since 2004, only 10% of increase in household electricity bills has been from Environmental and Renewable Energy Costs. New legislation is already driving down support costs for renewables Wholesale prices are more likely to rise in future. Measures to reduce consumption in the home now will have an important impact in future

8 7 What are component parts of Electricity Prices? Actual cost of generating electricity at power station – including fuel costs – varies on 30 minute basis. Average to date in 2012 ~ 4.5 p/kWh + max 10.9 p/kWh [Saturday 11 th Feb 18:00] min 2.8 p/kWh Distribution Charges by UK Power Networks ** equivalent to overall charge of ~ 1.95 p/ kWh to domestic consumers Transmission Network Charges by National Grid Company. In East Anglia 3.63p / kWh (North of Scotland 1.48p/kWh - South West 4.23 p/kWh) * + From ELEXON Website – weighted average 30min figure * National Grid Charging Statement April 2012 ** UK Power Networks Charging Statement October 2011 ~10p Charges by Meter Reader [e.g. Siemens] Admin and billing by Electricity Supplier – e.g. E.ON, nPower etc. Profit for Electricity Supplier Retail Price of Electricity in range 12 – 28p /kWh – often two rates – more expensive for first units – cheaper thereafter.

9 8 What are causes of rise in recent years? (2) While retail electricity prices remain constant – wholesale price vary substantially over the day. In America there are already places where tariff varies 5 – 6 times a day and consumers get a discount on these tariffs. Such tariffs may come to UK in near future. Wholesale Gas prices are currently 1.75 /kWh and over 3 times price in 2004 when UK started to run out of gas. Retail prices are around 3.75 – 4 p/kWh By 2020 whole prices will rise and may double from present levels. Range of Expert Projections

10 Approximate Carbon Emission factors during electricity generation including fuel extraction, fabrication and transport. 9 Impact of Electricity Generation on Carbon Emissions. Fuel Approx emission factor per kWh Comments Overall UK~540g Varies on hour by hour basis depending on generation mix Embedded carbon from construction is around gms/ kWh for Wind, Nuclear and Coal – slightly less for gas, but rather more for solar Coal900 – 1000g Depending on grade and efficiency of power station Nuclear5 – 10gDepending on reactor type Gas400 – 430g Assuming CCGT – lower value for Yarmouth as it is one of most efficient in Europe Renewables~ 0For wind, PV, hydro – variable for biomass

11 Carbon sequestration either by burying it or using methanolisation to create a new transport fuel will not be available at scale required until mid 2020s if then 10 Options for Electricity Generation in Non-Renewable Methods Potential contribution to electricity supply in 2020 and drivers/barriers Projected 2020 costs May 2011 (*) Gas CCGT % (at present 40-50%) Available now (but gas is running out) 8.0p [5 - 11] nuclear fission (long term) % (France 80%) - (currently 18% and falling) new inherently safe designs - some development needed 7.75p [ ] nuclear fusionunavailable not available until 2040 at earliest not until 2050 for significant impact "Clean Coal" Coal currently ~40% but scheduled to fall Available now: Not viable without Carbon Capture & Sequestration [ ]p - unlikely before 2025 * Energy Review 2011 – Climate Change Committee May 2009 Nuclear New Build assumes one new station is completed each year after ?

12 11 Options for Electricity Generation in Renewable Future 2020 prices from Climate Change Report (May 2011) or recent RO/FITs where not otherwise specified Photovoltaic<<5%available, but costly16p +/-4 Biomass??5% available, but research needed p Geothermal unlikely for electricity generation before 2050 if then -not to be confused with ground sourced heat pumps Potential contribution to electricity supply in 2020 and drivers/barriers May 2011 projection for 2020 (Gas ~ 8.0p) On Shore Wind ~25% available now ~8.2p +/- 0.8p Off Shore Wind % available but much more costly than onshore 12.5p +/- 2.5 Small Hydro5% limited potential11p for <2MW Wave/Tidal Stream currently < 10 MW ?? MW (~0.1%) technology limited - major development not before p Tidal / 26.5p Wave Tidal Barrages5 - 15% In 2010 Government abandoned plans for development 26p +/-5

13 12 Do we want to exploit available renewables i.e onshore/offshore wind and biomass?. Photovoltaics, tidal, wave are not options for next 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 [9 th 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? >>>>>> Our Choices: They are difficult

14 13 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

15 14 Our looming over-dependence on gas for electricity generation Data for modelling derived from DECC & Climate Change Committee (2011) - allowing for significant deployment of electric vehicles and heat pumps by Existing Coal Existing Nuclear Oil 14 Data for modelling derived from DECC & Climate Change Committee (2011) - allowing for significant deployment of electric vehicles and heat pumps by Existing Coal UK Gas Imported Gas New Nuclear New Coal Existing Nuclear Other Renewables Offshore Wind Onshore Wind Oil 1 new nuclear station completed each year after new coal station with CCS each year after million homes fitted with PV each year from % of homes fitted by GW of onshore wind by 2030 cf 4 GW now Data for modelling derived from DECC & Climate Change Committee (2011) - allowing for significant deployment of electric vehicles and heat pumps by No electric cars or heat pumps Version suitable for Office 2003, 2007 & 2010

16 15 Many have been warning Government for last years But have they listened?

17 16 Social Attitudes have a profound effect on actual electricity consumption For a given size of household electricity consumption for appliances [NOT HEATING or HOT WATER or COOKING] can vary by as much as 9 times. Data courtesy of Karla Alcantar Significant savings in money can arise from effective awareness raising When income levels are accounted for, variation is still 6 times Raising Awareness: Variation in Domestic Consumption Data from 114 Houses in Norwich

18 17 How we are charged for energy Increasing consumption Average Consumption Current Pricing Tariffs penalise the poor and those who are energy conservation conscious - The more you use the cheaper it gets per unit. An alternative – same price for average consumer, but the poor benefit and for those with higher consumption, investing in energy saving devices becomes more cost effective.

19 18 How many people know what 9 tonnes of CO 2 looks like? 5 hot air balloons per person per year. On average each person in UK causes the emission of 9 tonnes of CO 2 each year. "Nobody made a greater mistake than he who did nothing because he thought he could do only a little." Edmund Burke (1727 – 1797) Raising Awareness

20 19 Raising Awareness A Toyota Corolla (1400cc): 1 party balloon every 60m. 10 gms of carbon dioxide has an equivalent volume of 1 party balloon. Standby on electrical appliances up to kWh a year balloons. (up to £15 a year on each appliance) A Mobile Phone charger: > 10 kWh per year ~ 500 balloons each year. Filling up with petrol (~£55 for a full tank – 40 litres) kg of CO2 (5% of one hot air balloon) How far does one have to drive in a small family car (e.g cc Toyota Corolla) to emit as much carbon dioxide as heating an old persons room for 1 hour? 1.6 miles At Gaoan No 1 Primary School in Xuhui District, Shanghai A tumble dryer uses 4 times as much energy as a washing machine. Using it 4 times a week will cost ~ £100 a year just for this appliance alone and emit over half a tonne of CO 2. School children at the Al Fatah University, Tripoli, Libya

21 kWh% costRank% Renewables Norwich3,53579%6 0.0% Ipswich4,34997% % Waveney4,41799% % Broadland4,618103% % Great Yarmouth4,699105% % St Edmundsbury4,869109% % Breckland5,028112% % Forest Heath5,174116% % Babergh5,252117% % South Norfolk5,347119% % Suffolk Coastal5,371120% % North Norfolk5,641126% % Mid Suffolk5,723128% % King's Lynn and West Norfolk5,731128% % UK Average4478 % of average cost of electricity bills compared to National Average Rank position in UK out of 408 Local Authorities Average household electricity bill in Norwich is 64% that in Kings Lynn Average Domestic Electricity Consumption in Norfolk and Suffolk 20

22 21 Pilot Lights £9 per week Pilot lights off Pilot Lights turned off during week District 1080 Community Service & Vocations Committee Awareness Raising and Good Record Keeping results in significant savings St Pauls Church, Tuckswood Heated by 3 warm air heaters New Strategy: pilot lights off throughout summer and used strategically in winter resulted in an annual saving of: 5400 kWh of gas; 1030 kg of CO 2 ; and a monetary saving of £260 Or a percentage saving of 38%

23 22 The best strategies to save energy, carbon and money in the home This software will be available for you to explore options for your own home at the end

24 23 Basic House No Insulation £ mm Loft Insulation and Cylinder Jacket. £ mm Loft Insulation £1465 Double Glazing (100 mm Loft) £1299 Cavity Insulation (100 mm Loft) £1196 All Strategies + condensing boiler £796 What are the best strategies in the home? Try out your own home on the software.

25 24 What are the best strategies in the home? Using a tumble dryer 4 times a week can cost £100 a year

26 25 What are the best strategies in the home? (1) Insulation / Heating Priorities: Hot Water Cylinder Insulation Time switch hot water requirements with manual override It is a myth that if insulated it is better keep it on all the time Loft Insulation - always more cost effective to install to the maximum level in one go much less cost effective if there is 100 mm already Cavity Insulation – grants available Double Glazing - ensure windows are K Glass or low emissivity as performance will then approach that of triple glazing Condensing Boiler will save up to 20% [Dont confuse with Combis] Consider fitting a boiler energy manager which can save a further 5% Adjust timing controls to suit need Remember to set thermostat appropriately – a 1 o C reduction/increase will cause energy consumption to reduce/increase by 8% in UK climate.

27 26 What are the best strategies in the home? (2) A shower can save energy, but an electric Power shower used for 3 minutes is likely to consume more energy than a bath Some myths One should not turn fluorescent lights off as they consumer more energy in doing so than running for 15 minutes. WRONG!!! Turning up the thermostat will speed up the heating time. WRONG!!! How much does one save if the lid is put on a saucepan when cooking vegetables? When is your television likely to consume most energy? Standby on televisions / cable box combinations can cost up to £50 a year.

28 27 What are the best strategies in the home? (2) A tumble dryer uses ~ 4 times as much energy as the washing machine and will cost over £100 a year to run if used 4 times a week. Consider using solar drying in the summer. Some DVDs have two power standby modes - a high level using 20 W (equivalent to £20 a year), - low level one 1 – 2W (equivalent to around £1-£2 a year). low level still retains settings but takes 30 seconds to warm up. Printers can consume up to 20 W or more when on standby equivalent to £20 a year A study at UEA indicated that 15+% of electricity bills are typically associated solely with standby. Do not confuse low voltage with low energy. Halogen spotlights can be very wasteful.

29 28 What are the best strategies in the home? (3) Do not confuse kW with kWh as is so often done. Which consumes the most energy and costs the most to run? 1 ) Eight 50 W halogen spots (i.e. 400W total ) running on average 5 hours a day (i.e. 8 hours a day in winter - 2 hours in summer) 2) Boiling 12 cups (250ml) of water a day in a 3 kW kettle Lights will consume ~2 kWh per day and cost ~ £95 per year Kettle will consume ~0.37 kWh per day and cost ~ £16 per year Replace 50 W spots with 20 W bulbs save ~ £55 per year Replace with LED bulbs and save up to £85 per year. A 1 kW kettle will consume more electricity than a 3 kW one. Not only does it take three times as long, but more heat is lost to surrounds during boiling.

30 29 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 Solar PV – providing electricity - suitable for all sizes of installation Example 2 panel ( 2.6 sqm ) in Norwich – generates 826kWh/year (average over 7 years). The more hot water you use the more solar heat you get! Renewable Heat Incentive available from 2013 Area required for 1 kW peak varies from ~ 5.5 to 8.5 sqm depending on technology and manufacturer Approximate annual estimate of generation = installed capacity * 975 kWh Or just under capacity * 1000

31 30 Options available for the Householder Energy Generation Micro Wind - roof mounted turbines Mini Wind - mast mounted turbines – can be good as long as well clear of buildings, trees, etc – can be a good option for farms Building Mounted - ~ 1kW machines ~ generally poor performance because of turbulence except in a few locations Not generally recommended Mast mounted away from buildings - 6kW Potential output 6000 – kWh depending on location Vertical Axis machine – better in turbulence

32 31 Options available for the Householder Energy Generation Onshore Wind - sensible for community schemes – e.g. Orkney, Germany, Denmark etc – the cheapest form of renewable energy Biomass boilers - can be sensible but need a reliable fuel supply. In cost terms with the proposed Renewable Heat Incentive there are attractions for homes heated by oil or electricity but not, at present, mains gas. Most convenient if running on pellets Cheaper with wood chip but more difficult to automate

33 32 Ground Source: Heat Pumps Typically twice floor area of house is required for heat collection. Best performance with under floor heating – i.e difference between heat supply and source temperature is as low as possible Zones of house can be controlled via a manifold Options available for the Householder – Heat Pumps

34 33 Heat pumps run off electricity For a well designed ground source heat pump system: Typically 3.5 – 4 as much heat is produced as electricity consumed – the Coefficient of Performance (COP). If a buffer tank is included in system, then off peak electricity can be used to heat store overnight – minimising use of full rate electricity. Air source heat pumps require external fan system, and are not as efficient as air temperature is low when most heat is needed. Retro fitting with existing radiators will lead to poor COP, but could be improved by fitting double radiators and/or a buffer tank Options available for the Householder – Heat Pumps

35 Micro CHP Replaces normal boiler Provides heat and electricity – would normally run on gas Currently there are incentives under the Feed In Tariff. Options available for the Householder – CHP To be eligible to claim for any Incentive the installation must be installed by a registered MCS installer. Certificate of installation must be presented at time of registration. All microgeneration Installations such as solar, wind, biomass, heat pumps, CHP must be MCS Accredited

36 35 Installation Date 01/04/ /07/11 01/08/11 – 31/03/12 01/04/12 – 31/07/12 01/08/12 – 31/10/12 01/11/12 – 31/01/13 Installed Capacity Solar Photovoltaic New Build <= 4kW Higher Middle Lower Solar Photovoltaic Existing Buildings <=4kW Higher Middle Lower CHP11.00 Wind <= 1.5 kW Wind >1.5 kW <= 15 kW Feed in Tariffs payable in Export Tariff – solar installations before 01/08/2012 and all other installations 3.20 p/kWh otherwise 4.5 p/kWh – assumed at 50% of generation unless metered Higher Rate for Individual Domestic Properties achieving Energy Standard Medium Rate for multiple community schemes Lower Rate for domestic properties not achieving Energy Standard

37 36 BiomassAir Source Heat Pumps Ground Source Heat Pumps Solar Thermal (Hot Water) p/kWh5.2 – – – All housesHouses not heated by gas from the grid £300 – solar thermal – (3 month) voucher £950 – biomass boiler – (6 month voucher) £850 – air source heat pump – (5 month) £1250 – ground source or water source heat pump –(6 month voucher) Renewable Heat Incentive: from April 2013 Renewable Heat Incentive will provide support via an payment for each unit of renewable heat generated. Scheme has been delayed, now scheduled to start in April 2013 All eligible installations installed after 15 th July 2009 will qualify Consultation launched on 20 th Sept 2012 to decide on actual tariffs paid. Because of delay, one off vouchers are available for householders which must be redeemed by 31 st March 2013 or expiry of voucher.

38 37 Conclusions (1) Energy Bills are rising and are likely to continue to do so now that UK is no longer self sufficient in gas Wholesale prices for gas (and consequently electricity) are dependent on international markets and bidding from countries like China. Rise in cost of domestic electricity is little affected by renewable support. It is affected much more by on wholesale prices from s increased gas imports to Europe from Middle East and Russia. An unimproved house built in 1950s can readily reduce its heating energy bills by up to 60%. Awareness in use of appliances can reduce electricity bills by £100 or more per annum Minimise use of tumble drying Keep duration of electric power shower use down

39 38 Conclusions (2) Switch off appliance using a special remote switch rather than leaving TVs etc on standby Halogen spot lights can be costly to run – consider reducing wattage to 20/30W or even LEDs Reducing thermostats by 1 deg C will save 8% but do not do this if you are elderly and your thermostat is around 20 o C already New electricity tariffs may come with deployment of Smart Meters which would vary retail price more in line with wholesale prices. Consumers opting for these may see significant discounts. Lao Tzu ( BC) Chinese Artist and Taoist philosopher FINALLY "If you do not change direction, you may end up where you are heading." This presentation is available at

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