Norwich Business School Low Carbon Conversion and Nuclear Power Energy Conservation and Management...

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Norwich Business School Norwich Business School Norwich Business School Energy Conservation and Management in Buildings Renewable Energy 1 NBSLM03E (2010) Low Carbon Technologies and Solutions: Sections 10 - 13 N.K. Tovey ( 杜杜杜 ) M.A, PhD, CEng, MICE, CEnv

Transcript of Norwich Business School Low Carbon Conversion and Nuclear Power Energy Conservation and Management...

  • Low Carbon Conversion and Nuclear Power Energy Conservation and Management in Buildings Renewable Energy*NBSLM03E (2010) Low Carbon Technologies and Solutions: Sections 10 - 13N.K. Tovey () M.A, PhD, CEng, MICE, CEnv

  • * Energy Conservation in Buildings: The Basics Heat Loss Calculations Energy Management Carbon Emission Factors *Lecture 2NBSLM03E (2010)Low Carbon Technologies and SolutionsN.K. Tovey () M.A, PhD, CEng, MICE, CEnv

  • *Intrinsic Energy Use provision of comfortable thermal environmentFunctional Energy Use energy use associated with specific activities in building at time.Intrinsic Energy Use (mostly associated with heating) will vary little with different uses (apart from specifics e.g. warehouses, sports complexes etc).Functional Energy Use will vary depending on use e.g. office (high computer use), laboratory (equipment), supermarket, hotel etc.In a poorly insulated building, functional energy use over life time will be low as a percentageIn a well insulated building, functional energy can be the dominant use representing over 50% in the ZICER Building at UEA.Energy Conservation in Buildings: The Basics

  • *Heat Loss / Heat GainThree forms of heat transferConductionRadiationConvectionFor buildings - conductive losses are main issue to address in heat loss/heat gain.

    AT1T2Heat Flow is proportional to temperature difference

    Energy Conservation in Buildings: The Basics

  • *Construction of Typical UK Walls: Solid Walls most houses built pre-war.In addition to resistance of brick and plaster there is:Internal surface resistanceExternal surface resistanceEnergy Conservation in Buildings: The Basics

  • *Construction of Typical UK Walls: Solid Walls most houses built pre-war.U-value is amount of heat transferred per sqm for a unit temperature difference between inside and out.It is the reciprocal of aggregate resistance.R = rbrick + rplaster + rint + rextBut resistance = as A = 1.0 k for brick ~ 1.0 W m-1 oC-1rbrick = 0.22 / 1.0 = 0.22 m2 oC W-1For plaster k = 0.7 W m-1 oC-1 so rplaster = 0.013/0.7 = 0.02 m2 oC W-1Total resistance = 0.22 + 0.02 + 0.123 + 0.055 = 0.418 m2 oC W-1So U- value = 1 / 0.418 = 2.39 W m-2 oC-1Energy Conservation in Buildings: The Basics

  • *Construction of Typical UK Walls: post warCavities provide an extra air-space and hence extra resistance to heat flow.Energy Conservation in Buildings: The Basics

  • *Construction of Typical UK Walls: post warComponents of resistance Internal surface Plaster Brick Cavity Brick External Surface

    rinternal = 0.123rplaster = 0.013 / 0.7 = 0. 02rbrick = 0.11 / 1 = 0.11rcavity = 0. 18rbrick = 0.11 / 1 = 0.11rexternal = 0.055Total resistance = 0.123 + +0.02 + 0.11 + 0.18 + 0.11 + 0.055 = 0.598 m2 oC W-1U value = 1 / 0.598 = 1.67 W m-2 oC-1.Or 70% of solid wall.Energy Conservation in Buildings: The Basics

  • *Construction of Typical UK Walls: post ~ 1960Components of resistance Internal surface Plaster Block Cavity Brick External Surface

    rbrick = 0.11 / 1 = 0.11rblock = 0.11 / 0.14 = 0.76 rplaster = 0.013 / 0.7 = 0. 02rexternal = 0.055rinternal = 0.123rcavity = 0. 18Total resistance = 0.123 + +0.02 + 0.76 + 0.18 + 0.11 + 0.055 = 1.248 m2 oC W-1U value = 1 / 1.248 = 0.8 W m-2 oC-1.Or 50% of brick / cavity / brick wall.Energy Conservation in Buildings: The Basics

  • *Construction of Typical UK Walls: post ~ 1960Components of resistance Internal surface Plaster Block Cavity insulation Brick External Surface

    rbrick = 0.11 / 1 = 0.11rblock = 0.11 / 0.14 = 0.76 rplaster = 0.013 / 0.7 = 0. 02rexternal = 0.055rinternal = 0.123rcavity insulation = 0.05/0.04 = 1.25Total resistance = 0.123 + +0.02 + 0.76 + 1.25 + 0.11 + 0.055 = 2.318 m2 oC W-1U value = 1 / 2.318 = 0.43 W m-2 oC-1.Or 50% of uninsulated brick / cavity / block wall.Brick / cavity / brick wall with insulation has U Value = 0.59 W m-2 oC-1Energy Conservation in Buildings: The Basics

  • *U values for non-standard constructions can be estimated in a similar wayU values are tabulated for standard componentsU value single glazing ~ 5.0 5.7 W m-2 oC-1U value double glazing ~ 2.5 2.86 W m-2 oC-1Floors typically 1.0 unless there is insulation.Roofs depends on thickness of insulationUninsulated post war ~ 2.0 W m-2 oC-1 25 mm - 0.89 W m-2 oC-1 50 mm - 0.57 W m-2 oC-1 100 mm - 0.34 W m-2 oC-1 150 mm - 0.25 W m-2 oC-1 200 mm - 0.18 W m-2 oC-1 250 mm - 0.15 W m-2 oC-1There are diminishing returns after first ~ 100mm and other conservation strategies become more sensible both economically and in carbon savings.Energy Conservation in Buildings: The Basics

  • *Ventilationin poorly insulated buildings may be only 25 30% of lossesIn well insulated buildings may be > 80% of total heat losses.>> ventilation heat recovery e.g. ZICER.Ventilation occursThrough door/window openingThrough crack around windows / doors / floorsThrough fabric itselfThrough vents, chimneys etc.Adequate ventilation is required for healthCovered by specifying a particular number of air-changes per hour (ach) i.e. whole volume is changed in an hour.In a typical house 1 1.5 achIn a crowded lecture room may need 3 4 ach

    Energy Conservation in Buildings: The Basics

  • *Ventilation: equivalent parameter to U-value i.e. Proportional to temperature difference Volume * ach * specific heat of air / 3600 W m-2 0C-1

    Specific heat: quantity of energy required to raise temperature of unit mass (volume) of material by 1 degree.

    For air, specific heat ~ 1300 J m-3

    Ventilation heat loss rate = volume * ach * 1300/3600 = 0.361 * ach * volume

    Energy Conservation in Buildings: The Basics

  • * Energy Conservation in Buildings: The Basics Heat Loss Calculations Energy Management Carbon Emission Factors *Lecture 2NBSLM03E (2010)Low Carbon Technologies and SolutionsN.K. Tovey () M.A, PhD, CEng, MICE, CEnv

  • *Five components to heat loss / gain parameterLosses through FloorRoofWindowsWallsVentilation

    20: Heat Loss / Heat Gain CalculationsVentilation: Volume * 0.361 * ach Total Heat Loss / Heat Gain Rate (H) H = Area * Uvalue of fabric components + Volume * 0.361 * ach Heat lost from a building in a cool climate (or heat gained in warm climate) must be replaced (removed) by the heating (cooling) appliance e..g boiler (air-conditioner)Heat to be replaced (removed) = H * temperature difference (inside outside)Heat Loss / Heat Gain Calculations

  • *Design considerations:Heating/Cooling Capacity depends on internal and external temperatures.What should design temperature be?Internally comfortable temperature thermostat setting.Externally ?In internal temperature is set too high, sufficent heating will not be supplied in extreme conditions.But extra cost is often implied.Design External temperature in UK for heating 1oC In more extreme parts -30C is sometimes selectedHeavy weight buildings do store heat to allow for some carry over to colder conditions.Heating appliances usually come in standard sizes size to next size above requirement.Heat Loss / Heat Gain Calculations

  • *Design considerations:Hot water heating is often provided by same sourceProvides an extra buffer for peak heating demand.Heating / Cooling must be designed to cope with peak design demand.Annual Energy ConsumptionIncidental gains arise fromBody heatLightingHot water useAppliance useSolar gain

    Decrease / Increase overall annual heating (cooling) energy consumption typically by several degrees.

    Heat Loss / Heat Gain Calculations

  • *If incidental gains from all sources amount to 2250 watts, and the heat loss rate is 500 W C-1. Free temperature rise from incidental gains = 2250 / 500 = 4.5oCIf thermostat is set at 20 oC, No heating is needed until internal temperature falls below 20 4.5 = 15.5 oC.

    15.5oC is the neutral/base/or balance temperature.In UK and USA and used internationally the balance temperature for heating is on average 15.5oC (60oF).Each building is different and for accurate analysis, corrections must be applied.To allow rapid assessment of annual energy consumptionHeating Degree Days (HDD)Cooling Degree Days (CDD)There appears to be no standard for the base temperature for Cooling Degree Days but UKCIP02 uses 22oCHeat Loss / Heat Gain Calculations

  • *Degree Days are an indirect measure of how cold or how warm a given period is.Used for estimating annual energy consumption.Heating Degree DaysFor every 1oC MEAN temperature on a particular day is below base temperature we add 1.For 10oC we add 15.5 -10 = 5.5For -1oC we add 15.5 (-1) = 16.5For -10oC we add 15.5 (-10) = 26.5For days when MEAN temperatures above base temperature we do not add anything.Total Degree Days over a period is sum of all individual daysGives approximate estimate see shaded box in hand out for more accurate method.Monthly Degree Days are published atwww.vesma.com

    Heat Loss / Heat Gain Calculations

  • *Annual Degree Days East Anglia20 year average 1959 1978 - 243020 year average 1979 1988 - 235120 year average 1988 - 2007 - 2182

    Example: 1Heat Loss Rate (coefficient) is 450 WoC-1What is estimated energy consumption for heating in January to March based on latest 20 year data= 450 * ( 337 + 303 + 272) * 86400 = 35.46 GJOr 450 * (337 + 303 +272) * 24 / 1000 = 9850 kWh 86400 is seconds in a day24 is hours in a dayHeat Loss / Heat Gain Calculations

    20 year averageJanFebMarAprMayJunJulAugSepOctNovDec1979 - 1998374336291228145723636691572663411988 - 200733730327221212865333162143258338

  • *120 132 144 156 168 180 192 204 216 228 240HoursBoiler Output for a house during early January 1985. 20 15 10 5 0 -5-10Temperature oC10 9 8 7 6 5 4 3 2 1 0Boiler Output (kW)Heat Loss / Heat Gain Calculations

  • *If no heating is provided and mean external temperature is 20oCInternal temperature has a much lower amplitude and lags by several hoursCan be used in effective managementHeat Loss / Heat Gain Calculations

  • *In morning period, boiler is full on during period, but throttles back during evening periodHeat Loss / Heat Gain Calculations

  • *With time switching larger boiler is required to get temperature to acceptable levelsHeat Loss / Heat Gain Calculations

  • *Large building in tropical country has 12000 sqm of single glazingElectricity consumption is as shownIf Cooling Degree Days are 3000, and coefficient of performance of air-conditioner is 2.5, what is annual energy consumption?Gradient of cooling line is 75 kW /oCAnnual consumption is 75 * 3000 * 24= 5400 MWhIf carbon factor is 800 kg /MWhCarbon emitted= 5400 * 800 / 1000 = 4320 tonnesHeat Loss / Heat Gain Calculations

  • *Gradient of line = 75 kWoC-1actual heat gain rate = 75 *2.5 = 225 kW oC-1 must allow for COP of air-conditionerInstalling double glazing reduces heat gain rate by:12000 * ( 5 - 2.5) = 30 kW oC-1 U values before and after double glazingSaving in electricity with be 30 /2.5 = 12 kWoC-1Saving in electricity consumed= 12 *3000 * 24 = 864 MWhcarbon saving = 864*800 / 1000 = 691.2 tonnes

    Heat Loss / Heat Gain Calculations

  • *Annual electricity saved = 864 MWh - Annual carbon saved = 691.2 tonnes

    Marginal cost is 740 Paise/Unit - 9.328p per unit at Exchange Rate on 07April 2008Total saving in monetary terms would be 864 * 1000 * 0.09328 = 80,594 per yearWith a life time of 30 years say, this represents a saving of 2.4 millionA total of 25920 MWh saved and 20700 tonnes of carbon dioxide. If K glass (low emissivity glass were installed) savings would be around 50% larger

    Data for IndiaHeat Loss / Heat Gain Calculations

  • *New house designed with heat loss rate of 0.2 kW oC-1Two optionsOil boiler - oil costs 45p/litre: calorific value 37 MJ/litreHeat Pump electricity costs 4.5 per kWhExamine most cost effective option.Heat pump data as shown in graph.Capital costs:Oil Boiler 2000, Heat Pump 4000Heat Loss / Heat Gain Calculations

    TemperatureCOP6.5312.54.0164.283.2

  • Col (5) = 15.5 col (2)Col (6) = 0.2 * col (5) * col (4) * 24Col (7) = col (6) / col (3)Oil required 9456 kWh = 34042 MJSo 34042 / 37 = 920 litres are neededCost of oil = 920 * 0.45 = 414Cost of electricity for heat pump = 2658.5 * 0.045 = 119.64 and an annual saving of 294.36Analysis is best done in tabular formHeat Loss / Heat Gain Calculations

    External Temperature (oC)COP from graphNumber of daysDifference from balance temperatureHeat Requirement (kWh)Requirement after allowing for COP (kWh)(1)(2)(3)(4)(5)(6)(7)Jan - Mar6.5390938881296Apr - Jun12.549131310.4327.6Jul - Sept164.292NoHeatingneededOct - Dec83.2927.533121035Total energy requirement8510.4Boiler efficiency90%Energy input boiler option as oil9456Total effective electrical input via heat pump2658.6

  • Annual saving in energy costs = 294.36

    At 5% discount rate, cummulative discount factor over 10 years is 8.721735So the discounted savings over life of project

    = 8.721735 * 294.36 = 2567.36

    This is greater than the capital cost difference of 2000 (i.e (4000 - 2000), there will be a net saving of 567.36 over the project life and the heat pump scheme is the more attractive financially.

    Heat Loss / Heat Gain Calculations

  • * Energy Conservation in Buildings: The Basics Heat Loss Calculations Energy Management Carbon Emission Factors *Lecture 2NBSLM03E (2010)Low Carbon Technologies and SolutionsN.K. Tovey () M.A, PhD, CEng, MICE, CEnv

  • Energy Management: Electricity Consumption in a medium sized regional office of a large companyElectricity Consumption improves in late 2004Implementation of conservation measures - Low Energy Lighting phased over autumnSudden jump in consumptionNearly double early 2005 level33% higher than historic levelCost increase ~ 10000 - 12000 paCO2 increase ~ 100 tonne per annumAppears to be associated with malfunction of air conditioner*

  • *Energy Management: Electricity Consumption of several offices of a large company

    Electricity Consumption kWh/m2 )Local Authority OfficesNorwichGreat YarmouthKings LynnNaturally ventilatedAir-conditionedGood Practice5497289125140Typical85178

    ElectricitykWh/m2kWh/employeeGreat Yarmouth125.34695Kings Lynn140.03226Norwich289.43817

  • Annual Household consumption of Electricity in Norwich 3720 kWhEnergy Management: Electricity Consumption and Carbon Dioxide Emissions of several offices of a large company*

    ElectricityCarbon DioxidekWh/sqmkWh/employeekg/sqmtonnes/employeeGreat Yarmouth125.3469589.23.34Kings Lynn140.032261052.43Norwich289.43817188.22.48

  • *Basic analysisAim: Assess overall energy performance of buildingNormalise to a standard time periodAssess variation with external temperaturePredictionAim set targets for energy consumption following improvements Issues to addressConvert all units to GJ or kWhfor GJ multiply heat loss rate by Degree Days and number of seconds in a day (86400).for kWh multiply heat loss rate by Degree Days and number of hours in a day (24).Energy Management: Assessing Annual Consumption

  • *Degree day methodQuickerOil & coal heating difficult general estimates of consumption Mean temperature methodMore accuratePlot mean consumption against mean external temperatureEnergy Management: Assessing Annual Heating Requirements

  • *Two component partsTemperature relatedIndependent of temperatureHot water & cooking if by gasTotal Energy = W + H*degree days*86400W energy for hot water + cooking (gas)H is heat loss rate for the homeTwo unknowns W & H, Know degree days & energy consumption in two different periods of yearEstimate heat loss & steady energy requirementAssessing Annual Heating Requirements: Degree Day Method

  • *Energy consumption 2 successive quarters: 31.76 & 18.80 GJCorresponding degree days: 1100 and 500

    Total Energy consumed = W + H * degree days*86400 1100 * H * 86400 + W = 31.76 ..(1) 500 * H * 86400 + W = 18.80 ..(2)Simultaneous equations (subtract 2 from 1)

    H = (31.76 18.80) * 109 = 250 Watts (1100-500)*86400Substitute for H in either equation to get W

    W = 31.76 * 109 - 1100 * 250 * 86400 = 8 * 109 = 8GJH - heat lossW - hot waterAnnual Heating Requirements: Degree Day Method - example

  • *Once H & W have been calculatedPerformance for subsequent quarters can be estimatedIf degree days for 3rd quarter = 400Consumption predicted to be 400 * 250 * 86400 + 8 * 109 = 16.64 GJ H W

    If actual consumption is 17.5 GJ then energy has been wastedAnnual Heating Requirements: Degree Day Method - example

  • There is a fair amount of scatter about trend lineLines drawn at 1.5 standard deviations above an below trend lineSome consumption data points lie outside the band and should be classified as Reporting IncidentsWith time tighter deviation lines can be drawnAnalysis of Energy Consumption Data in a Building Degree Day Method*

  • *Electricity consumption varies during year.Base load for appliances and refrigerationVariable lighting Load depending on number of hours required for lightingIntercept is base load (A)Gradient is Lighting Load Parameter LInstalling Low Energy Lighting will decrease gradient by a factor 5

    Installing more efficient appliances will reduce base load

    Installing both measures will reduce both L and AAnalysis of Lighting in a Building not heated by electricity

    Chart2

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    Lighting Hours

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    Lighting Hours

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    Sheet2

    appliances and lighting

    Lighting Hours

    Mean Wattage over day

    Sheet3

  • *Plot the mean consumption over a specific period against mean external temperatureGenerally more accurate than Monthly Degree Day Method as short term variations can be explored.With Daily readings, variations with day of week can be explored e.g. Weekend shut down, do Mondays see extra consumptionTwo parts to graphHeating part represented by sloping lineBase load for cooking/hot water by horizontal line.Do not merely do a regression lineAnalysis of Energy Consumption Data in a Building Mean Temperature Method (not heated electrically)

    Chart1

    7.375-65

    6.875-46.875

    6.375-26.375

    5.87505.875

    5.37525.375

    4.87544.875

    4.37564.375

    3.87583.875

    3.375103.375

    2.875122.875

    2.375142.375

    22

    2.052.05

    1.981.98

    22

    1.981.98

    External Temperature

    Consumption (kW)

    Sheet1

    0.25

    consumption

    21.5-67.3755

    19.5-46.8756.875

    17.5-26.3756.375

    15.505.8755.875

    13.525.3755.375

    11.544.8754.875

    9.564.3754.375

    7.583.8753.875

    5.5103.3753.375

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    1.5142.3752.375

    1622

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    Sheet1

    External Temperature

    Consumption (kW)

    Sheet2

    Sheet3

    MBD000A90E4.doc

  • *Gradient of line is related to heat loss rate (coefficient)Adjust for boiler efficiencyMultiply by to get heat loss rate (coefficient) e.g. 70% for non condensing boiler, 90% for condensing boiler300% for heat pump

    Efficiencies of all boilers are available on SEDBUK Database www.sedbuk.com/index.htm

    Two parts to graph

    Heating part represented by sloping lineBase load for cooking/hot water by horizontal line.Analysis of Energy Consumption Data in a Building Mean Temperature Method (not heated electrically)

    Chart1

    7.375-65

    6.875-46.875

    6.375-26.375

    5.87505.875

    5.37525.375

    4.87544.875

    4.37564.375

    3.87583.875

    3.375103.375

    2.875122.875

    2.375142.375

    22

    2.052.05

    1.981.98

    22

    1.981.98

    External Temperature

    Consumption (kW)

    Sheet1

    0.25

    consumption

    21.5-67.3755

    19.5-46.8756.875

    17.5-26.3756.375

    15.505.8755.875

    13.525.3755.375

    11.544.8754.875

    9.564.3754.375

    7.583.8753.875

    5.5103.3753.375

    3.5122.8752.875

    1.5142.3752.375

    1622

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    2222

    241.981.98

    Sheet1

    External Temperature

    Consumption (kW)

    Sheet2

    Sheet3

    MBD000A90E4.doc

  • *Data before conservationIntercept = appliance and refrigeration load (A).Gradient is Lighting load (L)Low energy lighting installed should reduce L by 80%Actual data after installationSuggests that improvement of 80% is not achieved.If actual data are shown as blue line improvements in energy management have taken place or replacement of appliances with more energy efficient ones.Analysis of Lighting in a Building not heated by electricity An Example

  • *A appliance LoadW water heating LoadH heat loss parameterL lighting Load parameterMore complex for analysis as both H & L are unknownCombine A & W to give overall appliance + hot water load (A*)E = (degree days * H + lighting hours * L) * 86400 + A*Where E = energy consumption3 unknowns H, L & AIf we have data for 3 quarters Estimate values for H, L & A by solving 3 simultaneous equationsIf appliance load is known calculation is easierActual analysis is beyond the scope of this scope, but the potential does exist. If more than three month data are available then opportunities for statistical analysis exist.Analysis of Heating and lighting in an electricilly heated Building Method 1

  • *SavingExcessNo energy conservation horizontal lineWinter following improved insulationSummer no savings heat conservation onlyWinter parallel to 2Summer - improved management of hot waterShould be (4) + (5) but gradient is in fact less - energy conservation performance has got worseCumulative Deviation MethodNot as detailed as other methods, but good for displaying monetary savings in Lay Mans terms

  • Actual data from large residential building in Shanghai in 2006Fudan University Twin TowerGradients of lines 43.05 MWh per deg C per month heating 52.12 MWh per deg C per month coolingAssume 720 hours in a month 59.8 kWoC-1 heating and 72.4 kWoC-1 cooling =43.05/720 = 52.12/720ANALYSIS OF BUILDING WITH HEATING AND COOLINGAll energy consumption is from electricity*

  • Annual Heating Demand - 1675 MWhAnnual Cooling Demand - 2515 MWhAnnual Baseline (Functional) Demand - 2304 MWhFunctional Energy Use is 35.5% of total energy use.Baseline consumptionAnalysis of Energy Data - Fudan University Twin TowersANALYSIS OF BUILDING WITH HEATING AND COOLINGNeutral Temperature - 17.5oC

    Baseline consumption - 192.0 MWh/month*

  • * Energy Conservation in Buildings: The Basics Heat Loss Calculations Energy Management Carbon Emission Factors *NBSLM03E (2010)Low Carbon Technologies and SolutionsN.K. Tovey () M.A, PhD, CEng, MICE, CEnv

  • Emission Factors for Fossil Fuels in UKEmission factors for Fossil fuels as used in the UK are available at:http://www.decc.gov.uk/en/content/cms/statistics/climate_change/gg_emissions/intro/intro.aspx.Single values if emission factors are quoted per unit volume or massTwo different values are quoted if specified in terms of energy content e.g. GJ, kWh depending on whether Lower or Higher Calorific Value is used.Which calorific value should be used.,If lower CV is used then emission factor is higher when specified in energy termsIf higher CV is used the emission factor is lower when specified in energy terms

    Emission Factors *

    CO2Fuel TypeUnitskg CO2 per unitNatural GaskWh net0.20374kWh gross0.18358cum2.0091therms net5.9712therms gross5.3801

  • *Calorific Values across the UK on 29/05/2010 Emission Factors: Calorific Values of Natural Gas Calorific values vary slightly among fuelsFor natural gas it also depends on pressure and compositionIs becoming more variable as increased amounts are imported from overseas

    Charging ZoneCalorific Value MJ/cumEastern38.9East Midlands39.4Northern40.2North East39.5North Thames39.0North West39.0Scotland39.7South East39.1Southern39.1South West39.1West Midlands39.1Wales North39.0Wales South39.3Scottish Independents38.3Stranraer39.6

  • Emission Factors for electricity depend onFuel mixEfficiency of Generation by each fuelFuel mix varies from day to day less coal at weekendsFuel mix varies from day to night *Emission Factors: Electricity Generation

    Fuel Mix December - January2008/92009/10Coal44%34%CCGT36%46%Nuclear15%17%

    Chart1

    170643.55400703.5335467175861122414833.5228031710

    172726.5527984.5034310093061167214959.5008960

    173984531240.503364476966923315358.50060610

    175036.55365340334255.56568.5897413929.5005890

    173829525045.50182715.5132218478132380011230

    172547.5492714014608321124.5714013239.51280111450

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    164465.55009360321310.59823.5719213133236080570

    1694615028230332893.514019.51125513758118078980

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    170333.5511985.503618713631.510817132780080780

    171989497430.50272145.51443.511765118961710370

    17251249001426278201997.51180412956596.504890

    172689.5517412.51517.5382696.57314.51316812589.57.504680

    172108.5533296.54442401049.510105.5105711073421.5000

    1717985262400424204.512438.59861115340000

    172165.5536713.504043867894.5859710068157.5000

    170360.55381660406543.53300.51408710581306.503500

    167753502760.50366852.5918212286973192.5000

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    1891894054710195665.51371.566615363.500312250

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    191405.5482218.50474203.55972.511161470324003720

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    182763.54654261950.5536670.52662.5135024401.5109015330

    178414449762.5755453042.52731108874319.50000

    178711.5383137.5740.5477440.517403113804747.5167000

    180098.5458825.5255551953018643.5133995072265.508160

    181024.54871480497465.525460.572994994.51250480

    December 2009 January 2010

    Nuclear

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    UK Electricity Generation - December 2009 - January 2010

    daily

    HALF HOURLY OUTTURN GENERATION BY FUEL TYPE DATA (MW)

    TotalNuclearCCGTOilCoalWindPSNPSHYDOCGTOtherINTFRINTIRL

    DateData in this section is daily generation

    2008111517585126584.5379828.54638.5267419.519966.584951562883.5035477307

    2008111633169131338.5388578.51543.5281996.57169.58722144710035179337

    2008111735281129230.54220703942.5417099976511392136350016840587

    2008111835537129361390413.55411.544049213002.51223312427.50011347951

    2008111934669132113381429.54742440100214791012512269.50013582462

    2008112035245133092.5378172.51772430754.5205311197812126.5162.508788306

    20081121355131331473893982057427111145511391212065322010884301

    2008112235748132577.53393473655.539253772891036110615.50040625616

    2008112334387138512328137.51981.5394325.513634955710251.50038930240

    2008112439044137801.539054010352.5477937.5119491447411150.5433.507405851

    2008112539612145302392383115605316678988.51147711164.5003467676

    2008112638711152580.53906567310514142.516642.51373311691.5243.503770154

    2008112739027152295.5376278.59291.5488403.517653.51659913236.522205147219

    2008112838210157234.5372057.512841506730.537751305112754004466427

    2008112937439158048.5346260.55795448667255.51297511255007899235

    2008113037598158806347497.53935418735.513851418610544.50013709275

    20081201395981160382410620.58677.55070086590.51299811363969.50465777

    20081202404052159082413698.522339.5495995.5347412799955336.50780894

    20081203399913161376.543152914273.5514529.54786122819960169.50502552

    2008120439313416135941575915153.5497862.56189154068032.5236.506500166

    20081205382745152223.5403407.5121924896889223998896013.50821954

    20081206375816151268.5357746.55052.5420728.52785.51256394930025088153

    20081207365447151264.5359231629405035.512966.5109769060.50028564242

    2008120839937815429640863424394.54998686959.51418011652.5351048480

    20081209402979155504.5428178158564994136759.51480412049136.5048080

    200812104096410156863.542340017348.5509127.55542.5141801277443406584133

    200812114152011160610.543535621941.54926121247.5152661397556205935320

    200812123782612161620.5428580.514018.5484620157941024910647.510706268256

    200812133838913160348.5391766.51613412003.52889.512588112570010323391

    2008121437595141583043950197962.5388615.51650.512996118870010533480

    200812153934615158296.542743114210476421.510807.51296710445007008179

    200812163801816157196.541334310735499229.515508.51258512531199.506035253

    200812173794217159773.5393556.56829493494.518675.510297143870025470

    200812183682018165647.53626017403491718.520516.51204917459007630

    200812193647619169996.5352932.512957459769188849985178570069540

    2008122035458201688063073800375531119411331916885240.50407570

    200812213448221167160.5297213032906623626.51074917060.510004706156

    200812223607022167000.53213733956441902.510638.5102491719790201260

    20081223347502316806431704504365427561124171703880.502614312

    200812243387424166668291472.503989221184.51109315120.51400448310

    200812253122625167351.52742270311827.587167961279300481320

    200812263330326170967.5273560.50296897.51100.5120101155500464510

    200812273403027167922.5302319.578353754141462.57373104851390162920

    200812283549128158637.5319771.5111973694412546.5108511023500182360

    200812293731329159704.534200115093.5431533.53300.5100341023100115600

    200812303714330159886333234.5121074576341086.587119834.500218550

    200812313810931166187.5304987.5113864637049221361510103.527103430224

    200901013563411672212778910424104.52073.593447420004086174

    200901023816421535753455300459579.51635100967734.5001249740

    20090103383183139159.5363906.50437595.53703101528547.5170014754221

    20090104381704131237.53913712022.5430947.53071119888142.5405.50101050

    20090105424695123125455159.5134475138873273.518320107281300.5026580

    20090106427636123218456630.520151.5556972.56932117778612280.506746336

    20090107413757131578447088138655591602143.511941860525408419588

    20090108418598132497.5423880.5128335526148769.5102618088006612344

    2009010941238912553542543018337558767.511055102169357128.50346691

    2009011037910101340353698083215490587245311034910362002826363

    200901113634311130611.53347800461432.52544995621459600406755

    200901123933712137928.540280961054982031875712626168530025180

    200901133951613140769389489.55960540199.526931154117115.500185639

    2009011439950141365504058259671.5543750.57340.514273163232400592109

    200901153775813240439497717547522501.521990.5964515940.5903.500175

    2009011636651129748355586.511992515693.514512.51088018462005960162

    2009011734889129903.52890760430723.519071742517737.5226.503739673

    2009011835310131452.52900120417236170118393161751350417660

    2009011937610134325.536697712242.5510640.573341233717871134.50181930

    2009012039229134390.5381344.58431516203.510872.5122191576000703555

    2009012137759139465407160.520479512468.510219942115991267.50408241

    2009012238333141068.537999012392496585.518064.51144514865142.501541289

    2009012338591145735368657.5149794916888399.5114611474461701806423

    2009012436370148297316061.53380.54337047325931813934.5004734461

    2009012535482153039.5294194.5631.541281415555.5809513128.500466350

    2009012638568153546350231.593755269994561117501308500148770

    200901273883315153336188917079549408.56103.51369912660136.50331140

    2009012839541153154359561.51208954803256871157712045.51670685740

    2009012938340143912376089.514788.553464015332.51037213297.533602115243

    200901303780512721834326713700.5540556.5212101145113680.50010215193

    20090131360791521072779783589436793.520023.5917313659.5135047554157

    20090201378441726322983593932.541854713451.51345912612.54520462450

    2009020239514173400351564.55542.554106711831.51422511076.5102.50178290

    2009020340203183915.5342427.54310563577.514973.51281611142.51020823838

    2009020440846189111356457.518792550498.53286.51628511834.599.50553938

    2009020540640185234.5351864.58085559015.54748.512680118496901169636

    2009020639944182128325927.54659.5556056.575041420510467.5276024488145

    2009020738776176570283721.57479743922887598291337.5044962723

    2009020837447182118.5276605.51069474223.51943.5104688901.51660450500

    2009020939228188139345171.56929.55537581195.5133649328.51640139690

    2009021039648190674328185.50557475.5168712511696920102586131

    200902114036119148834567205579242468.5109477105.5001568251

    2009021240554190096384482.513368.55300995585.5128989154.5221.50264386

    2009021339431184588389879989501192526131538089469.50485252

    2009021437333183051382096.54622.53926354395112117489003953231

    2009021536290191203.5337143.50380979.58264957278060028480

    2009021637084196261.5376117.51124.544405513941.5937594204108200

    2009021737680200498393030043544267791127211693.50048471

    20090218380442010843909350449505.513801055911031163.50388103

    2009021937539200780366368.50458198.54608.5115098534.51301189160

    200902203645120031438804104025307152137977434.5003869110

    2009022133972199978.5334862029543116747888679430027613267

    2009022233200203282.5310697.50288550154751075598544110328800

    2009022336013207169349258.53138.54049637346135779826.531.50127180

    2009022436137204510377130.59892.539762733501573810474.515.507508110

    2009022535315209197374782.5154438778922354.589879474.5005477146

    2009022635646209721.5372398.5387038079716312.511018104636907024140

    2009022735530209917362785.5035839310168.51342411577008592176

    2009022834347211340.5326386028981492671219311585216030487383

    2009030133526212921350574.502464327352.5108361103900347060

    2009030235191212535386497035758614757828110885.563.5089000

    20090303364112082573885591112383009.5121541300611456.5465.50656358

    2009030438067198197391492.51140416234.539681621512684.511950590056

    200903053781619397940288804365683097.51077610887.50043880

    2009030635907195821.540397903965596047101029949.525.50629062

    2009030733335198034.53481961168281066136631297810462.583.5024041211

    2009030832836197341313923026738123142973512149.5640.50414830

    2009030936120199718.5361812.5039998018293.5897812799454.5056450

    2009031037348195609.53858531271.5426934.53626.512303147201290106758

    2009031135465198234384260.5041888112384.585211191700264729

    2009031235978186530366275568379387.520137885115064253.50205758

    20090313345901865363732922137.5377066.58982.51373916362.51094.503247120

    2009031432227186755.5333274.50256426.522833.5750715316.51206.5029139382

    2009031532523196039.534701127.52215179591882518225.596703600361

    2009031634158196740.5390590.51076.53381774990.51247416811814038210

    20090317336042019653891310318691.53647.5720415824002189858

    20090318350512035803929120330196.52671.51345115559.5382.509864178

    200903193455120413140801011335711.52967.51267816709.568101244120

    2009032034161211846386748031382319651054816274.5183.507150119

    20090321322642141243442390217890.57438.5659312148311.5040490299

    2009032231246216689.5338474.50169875.521708554010585.500436030

    2009032333574218467.5372815.52844.5271982239021071912252.500254340

    2009032433675214813.53637592201347890.514153.5813213776186.50929957

    2009032534390220465.5363667.52331.5337070160011220115921.519404437119

    2009032634025218294.5367748.51188310801.523880.5760013423.5602087669

    2009032734326214075.5355564.50302893.524391.511468150981640208090

    20090328337651755932689391523.5219704.511528.51163013840.5359.5036355317

    20090330337172045493677130334929137111037413831.5500114620

    2009033132855205351.5385725124932393110130994515929.5239.50840658

    2009040132823205640380611669.5314201.53780.5800315883.5169.501203161

    2009040232501207802.5380033.50304927.54329721915131100.5015457220

    2009040331910207723.537952602884265487.5841912532510.5017062132

    2009040430098191482322031021759512182.5353210993.500465450

    2009040530110185975.5327661742.519538112339.54364999300471320

    2009040631969186807.53354130318350.5867192481057726.50371730

    2009040730009190892.53408700299549.51706115889925.50030907166

    2009040830861194623.53412390271876.514624.5456110972.50038265485

    2009040929450191831351551.5026165918536710510669102038765584

    2009041029734198143317820.5020648012303.573301248813.504653289

    2009041129161204406.5301981.50180790107278553137170047958150

    2009041228163212550.529599801632032571.563961187100480410

    2009041328028213281313809.50158803.56644.543881137700439540

    2009041430696210790348921.50233057.56097.5102491004900413310

    2009041530156206258.539083402201127860.567708514.50031333127

    20090416307012105394059230195394.514963.578029444.50041583118

    2009041730610215160410871018415614553.597399873.5003637489

    2009041829125217012.53799260125152.5299753918603.50042985188

    20090419285942067573677070122093.57386940773000456380

    2009042030812204796.5403147.515332252861067.59842723100260480

    2009042130161204886.5416065.50234220.58323503375231401249060

    2009042229915207541.5420134.502144309259.566156390.5001509873

    2009042330485206111.5420457.50217302663187095464.50012901145

    2009042429570194526.5406786.50212782.58566923753640016157128

    2009042528615192453.5367795.501394472977.55064511600456040

    2009042628044198074.5350262.50130948.57464.55314510800459210

    200904273147419882138544756812533466197168387483107.50174080

    2009042831502198867.54061512148.52731416362.510878621514.501104358

    2009042930660193452.54027982.5265664.510306.572547171.514008140102

    2009043030119173737390047.53842.52368129431.571575946.543102018190

    2009050129524176564398863.521.51992381449210476684512047656146

    200905022846817736137521501271559991.586506686.5218.50472550

    2009050327915182917.53605310990961034057946359.542.50461020

    20090504283621814243758670152761.520056.584246670.52040158560

    20090505298131769573980580231532.5152167174708411050273740

    2009050629960186453.5398863.5619210217.51479886078689.550384760

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    2009050829585188878.53624031935.5198599.522774835112285.540477140

    2009050928826178664.5348763014783213287.5867712259.51270480600

    20090510285371842233519790135939.52659.5775412155.5188.50480460

    2009051129785182030.5373680.502201262795.5921310917.54.50420990

    2009051230649165340383582.50237582.59243120091093060413120

    2009051331486144192382384.5222926913515157145271101318630448370

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    2009051629056139810.53276100218630.51548198016213210472080

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    20090522296491358833861270261736362195006877.500476790

    2009052327769146897.534653601769111137672425468.500479610

    2009052427470155374346801.501308731000457345245.500454510

    2009052527991160965376211.50161246.5332988145768.52540176890

    2009052628909161574398325017995511033.58094516500377760

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    20090530273151784443705010102180603481224660.5130443050

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    daily

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    Nuclear

    CCGT Data in this section is daily generation

    Oil

    Coal

    Wind

    PS

    NPSHYD

    OCGT

    Other

    INTFR

    INTIRL

    generationbyfueltypehistoric

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    Nuclear

    CCGT

    Oil

    Coal

    Wind

    PS

    NPSHYD

    OCGT

    Other

    INTFR

    INTIRL

    Sheet2

    HALF HOURLY OUTTURN GENERATION BY FUEL TYPE DATA (MW)

    CCGTOilCoalNuclearWindPSNPSHYDOCGTOtherINTFRINTIRLTotalCCGTOilCoalNuclearWindPSNPSHYDOCGTOtherINTFRINTIRL

    MWMW

    DateTimeMax23766264626044927012502480100471602014122Data in this section is daily generation

    PeriodMin00000000000to copysee start of 2010 - remainder does not have faormulae0000000000

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    FUELHH20081115439767.083333333316049084075342897059200148603277339767

    FUELHH20081115539767.104166666715731081565338901055200148603216439767

    FUELHH20081115639767.12515586079535343909055300148603183039767

    FUELHH20081115739767.1458333333151310752253427670541001486383082739767

    FUELHH20081115839767.1666666667146160722453459090515001486523014739767

    FUELHH20081115939767.1875142530702153489860514001484522965839767

    FUELHH200811151039767.2083333333139930701053399880534001486522940239767

    FUELHH200811151139767.2291666667139820696253389760596001484522939039767

    FUELHH200811151239767.25141540698853369710600001486522958739767

    FUELHH200811151339767.2708333333147970753453409900599001460523077239767

    FUELHH200811151439767.2916666667150190784153359730608001462523129039767

    FUELHH200811151539767.3125149720804153359820675001484523154139767

    FUELHH200811151639767.3333333333149480881153379700669001484103222939767

    FUELHH200811151739767.35416666671575109730533994828668300148203421939767

    FUELHH200811151839767.37516317010879533892850066400148403611039767

    FUELHH200811151939767.395833333316588011957534392964875200148403770139767

    FUELHH200811152039767.416666666716675012547534692366274800148403838539767

    FUELHH200811152139767.437516894013015534792955666800148403889339767

    FUELHH200811152239767.458333333316909013048534994140469100148603882839767

    FUELHH200811152339767.479166666716930012974535995041876200148403887739767

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