CHP PaybackProposed CHP Scheme Simple Payback AssessmentProject:Calculation Ref:Rev:Project No:Calculated by:Date:Area / Zone:Checked by:Date:Proposed CHP PlantElectrical output (kW)AkWHeat output (kW)BkWHeat output rejected ,not utilized (kW)CkWFuel input (kW)DkWSystem efficiencyE0%QI index (design)F0QI index (operation)G0Energy Tarrif DataElectricity - Unit costHpence/kWhClimate change levy (ELECT)Ipence/kWhGas - Unit costJpence/kWhClimate change levy(GAS)Kpence/kWhMaximum demand chargeLpence/KVA of MDBoiler efficiency (%)MMaintenance costNpence/hours runAnnual operating hoursO0HoursAssumed availability of plantPAssumed availability of plant for MDQMonthsProposed Capital CostsCHP plantRAncillary costsSSavingsElectricity displacedT0.0pence/hourBoiler fuel displacedU0.0pence/hourTotal savings / hourV0.0pence/hourCostsFuel input to CHP plantW0pence/hourMaintenance costsX0pence/hourTotal costs / hourY0pence/hourNet BenefitNet benefit / hourZ0.0pence/hourAnnual savings0.00Annual max demand savings0.00Total annual savings0.00Estimated payback period0.0years

&L&6&Z&F&C&6Sheet &P of &N&R&6&DPlease enter the electrical output in kWPlease enter the heat output in kWPlease enter the fuel inputPlease ener the heat that is rejectedThe system efficiency will be calculated for you:

E=(A+B-C)/DThe QI Index (design) will be calculated for you:

F=(200*A/D)+(130*B/D)The QI Index (operation) will be aclculated for you

G=(200*A/D)+(130*B/D*((B-C)/B)Please enter the unit cost for electricityPlease enter the climate change levy for electricityPlease enter the unit cost for gasPlease enter the climate change levy for gasPlease enter the maximum demand chargePlease enter the efficiency of the boiler in %Please enter the maintenance cost for the boilerPlease enter the assumed availability of the plant in %Please enter the assumed availability of the plant in monthsPlease enter the capital cost for the proposed CHP plantPlease enter ancillary costs for the proposed CHP plantThe annual operating hours will be calculated for you:

O =17*365*PThe savings due to displacedelectricity will be calculated for you:

T=A*(H+I)The savings due to displacedgas will be calculatd for you:

U=((A-B)/M)*(J+K)The total savings will be calculated for you:

V = T+UThe fuel input to the CHP plantwill be calculated for you:

W = D*JThe maintenance costs will be copied down from above:

X = NThe total cost per hour will be calculated for you:

Y = W + XThe net benefit per hour will be calculated for you:

Z = V-YThe annual savings will be calculatd for you

= Z*N / 100The annual maximum demand savingswill be calculated for you:

= (A*L / 100)*QThe total annual savingswill be calculated for you:

= + The estimated payback periodwill be calculated for you:

= (R+S) /