Welcome / Bienvenue
RETScreen Training InstituteRETScreen 101 – Introduction to Clean Energy Project Analysis
Saturday, Aug. 29 Agenda Location Trainers
8:30-9:00 am Coffee and checking in Hallway outside FDA 1
9:00-10:30 am Introduction toRETScreen 4 Software
Demo – Wind Energy Project
FDA 1 Greg Leng, NRCan
10:30-11:00 am Break (snack provided) Hallway outside FDA 1
11:00-12:30 pm Assignment:
Power – Photovoltaic– Feed-in Tariff – Policy / Canada
FDA 1 Greg Leng, Kevin Bourque, NRCan
12:30-1:30pm Lunch (provided) Hallway outside FDA 1
1:30-3:00 pm Overview ofEnergy Efficiency Project Analysis
Demo – Commercial Building
FDA 1 Kevin Bourque, NRCan
3:00 - 3:30 pm Break (snack provided) Hallway outside FDA 1
3:30-5:00 pm Assignment:
Lights – Compact Fluorescent Light & Electrical Equipment – Computer
FDA 1 Kevin Bourque, Greg Leng, NRCan
RETScreen Status
World’s leading clean energy decision-making software
Energy efficiency; heating & cooling; power generation; and cogeneration• Fossil fuels• Renewable energy
36 languages covering 2/3rds Earth’s population
445,000+ users in 222 countries & territories
30,000+ new users each year
600+ universities & colleges use for training & research
$8 billion in direct user savings since 1998
Core development team of 11 from Varennes research centre
+ 2 to 6 Co-op students/semester+ Other Varennes staff
350+ experts from industry, government & academia
NASA Langley Research Center
York University & global network of trainers
Software Development, Dissemination & Training
RETScreen Software Suite
Downloading and running RETScreen Software Suite will install two separate programs:
RETScreen 4 is an Excel-based clean energy project analysis software tool that helps decision makers quickly and inexpensively determine the technical and financial viability of potential renewable energy, energy efficiency and cogeneration projects.
RETScreen Plus is a Windows-based energy management software tool that allows project owners to easily verify the ongoing energy performance of their facilities.
Also available on RETScreen website:
REFRIG3 is an Excel-based RETScreen Energy Efficient Arena & Supermarket Project Model (Version 3 format)
Project Analysis
Energy resource at project site(e.g. solar radiation)
Equipment performance(e.g. solar absorptivity)
Initial project costs(e.g. solar collectors)
“Base case” credits(e.g. conventional cladding)
Annual & periodic costs(e.g. vandalism)
(Solar Air Heating Example)
Photo: NRCan
Financial Analysis
Base case system energy cost
(e.g. retail price of heating oil)
Financing
(e.g. debt ratio & length, interest rate)
Taxes on equipment & income (or savings)
Environmental characteristics of energy displaced
(e.g. oil, natural gas, grid electricity)
Environmental credits and/or subsidies
(e.g. GHG credits, deployment incentives)
Decision-maker’s definition of cost-effective
(e.g. payback period, ROI, NPV, energy production costs)
Analysis Type (Start Sheet)
User-definedUser-defined Energy
Green powerOther
Base case Proposed caseTechnology Grid electricity Wind turbinePower capacity kW 2,000Capacity factor % 30%Electricity exported to grid MWh 5,256Incremental initial costs $/kW 2,000O&M (savings) costs $/kWh 0.010Electricity export rate $/kWh 0.150
Emission Analysis
Base case electricity system (Baseline)
GHG emissionfactor
(excl. T&D)T&D
lossesGHG emission
factorCountry - region Fuel type tCO2/MWh % tCO2/MWhCanada All types 0.211 5.0% 0.222
Electricity exported to grid MWh 5,256 T&D losses 8.0%
GHG emissionBase case tCO2 1,167Proposed case tCO2 93Gross annual GHG emission reduction tCO2 1,074GHG credits transaction fee % 0.0%Net annual GHG emission reduction tCO2 1,074 is equivalent to 218
GHG reduction incomeGHG reduction credit rate $/tCO2 0.00
Financial Analysis
Financial parametersInflation rate % 2.0%Project life yr 20Debt ratio % 70%Debt interest rate % 7.00%Debt term yr 10
Initial costsIncremental initial costs $ 4,000,000 100.0%Other $ 0.0%Total initial costs $ 4,000,000 100.0%
Incentives and grants $ 0.0%
Annual costs and debt paymentsO&M (savings) costs $Fuel cost - proposed case $ 0Debt payments - 10 yrs $ 398,657Other $Total annual costs $ 451,217
Annual savings and incomeFuel cost - base case $ 0Electricity export income $ 788,400Other $Total annual savings and income $ 788,400
Financial viabilityPre-tax IRR - equity % 34.6%Pre-tax IRR - assets % 12.3%Simple payback yr 5.4Equity payback yr 3.2
RETScreen Energy Model - User-defined
Cum
ulat
ive
cash
flow
s ($
)
Year
Cumulative cash flows graph
Cars & light trucks not used
-2,000,000
0
2,000,000
4,000,000
6,000,000
8,000,000
10,000,000
12,000,000
14,000,000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Fuels & schedules Show data
Fuel Fuel type 1 Fuel type 2 Fuel type 3 Fuel type 4 Fuel type 5 Fuel type 6Fuel type Electricity Natural gas - m³Fuel consumption - unit MWh m³ #N/A #N/A #N/A #N/AFuel rate - unit $/kWh $/m³ #N/A #N/A #N/A #N/AFuel rate 0.100 0.400
Schedule Unit Schedule 1 Schedule 2 Schedule 3 Schedule 4 Schedule 5 Schedule 6Description 24/7
Occupied Occupied Occupied Occupied OccupiedTemperature - space heating °C 23.0 21.0Temperature - space cooling °C 23.0 24.0
Unoccupied Unoccupied Unoccupied Unoccupied UnoccupiedTemperature - unoccupied +/-°C 3.0
Occupied Occupied Occupied Occupied OccupiedOccupancy rate - daily h/d h/d h/d h/d h/d h/d
Monday 24 18.0Tuesday 24 18.0Wednesday 24 18.0Thursday 24 18.0Friday 24 18.0Saturday 24 18.0Sunday 24 18.0
Occupancy rate - annual h/yr 8,760 6,570 0 0 0 0% 100% 75% 0% 0% 0% 0%
Heating/cooling changeover temperature °C 16.0Length of heating season d 242Length of cooling season d 123
Facility characteristics Show data
Show: Heating Cooling ElectricityIncremental initial costs
Fuel cost savings
Incremental O&M savings Simple payback
Include measure?
Fuel saved GJ GJ GJ $ $ $ yrHeating systemBoiler 0 - - 0 0 0 -Cooling systemAir-conditioning - 0 - 0 0 0 -Building envelopeAppartment building 2,686 0 - 60,000 28,659 0 2.1VentilationLightsElectrical equipmentHot waterOtherTotal 2,686 0 0 60,000 28,659 0 2.09
Summary Show data
Fuel type
Fuel consumption -
unit Fuel rateFuel
consumption Fuel costFuel
consumption Fuel cost Fuel savedFuel cost savings
Natural gas m³ 0.400$ 160,194.2 64,078$ 88,546.3 35,419$ 71,647.8 28,659$ Total 64,078$ 35,419$ 28,659$
Project verificationFuel
consumptionFuel type Base caseNatural gas m³ 160,194.2
Heating Cooling Electricity TotalEnergy GJ GJ GJ GJEnergy - base case 4,204 0 0 4,204Energy - proposed case 2,324 0 0 2,324Energy saved 1,880 0 0 1,880Energy saved - % 44.7% 44.7%
BenchmarkEnergy unit kWhReference unit m² 7,500User-defined m² 2,000
Benchmark Heating Cooling Electricity TotalEnergy kWh/m² kWh/m² kWh/m² kWh/m²Energy - base case 155.7 0.0 0.0 155.7Energy - proposed case 86.1 0.0 0.0 86.1Energy saved 69.6 0.0 0.0 69.6
RETScreen Energy Model - Energy efficiency measures project
Base case Proposed case Fuel cost savingsFuel
Fuel consumption -
historical
Fuel consumption -
unit
Fuel consumption -
variance
SettingsMethod 1 Notes/Range Second currencyMethod 2 Second currency Notes/Range None
Cost allocation
Initial costs (credits) Unit Quantity Unit cost Amount Relative costsFeasibility study
Feasibility study cost -$ Sub-total: -$ 0.0%
DevelopmentDevelopment cost -$ Sub-total: -$ 0.0%
EngineeringEngineering cost -$ Sub-total: -$ 0.0%
Energy efficiency measuresIncremental initial costs 60,000$ 100.0%
Balance of system & miscellaneousSpare parts % -$ Transportation project -$ Training & commissioning p-d -$ User-defined cost -$ Contingencies % 60,000$ -$ Interest during construction 60,000$ -$ Sub-total: Enter number of months -$ 0.0%
Total initial costs 60,000$ 100.0%
Annual costs (credits) Unit Quantity Unit cost AmountO&M
O&M (savings) costs project -$ Parts & labour project -$ User-defined cost -$ Contingencies % -$ -$ Sub-total: -$
Fuel cost - proposed caseNatural gas m³ 88,546 0.400$ 35,419$ Sub-total: 35,419$
Annual savings Unit Quantity Unit cost AmountFuel cost - base case
Natural gas m³ 160,194 0.400$ 64,078$ Sub-total: 64,078$
Periodic costs (credits) Unit Year Unit cost AmountUser-defined cost -$
-$ End of project life cost -$
RETScreen Cost Analysis - Energy efficiency measures project
Emission Analysis
Method 1 Global warming potential of GHGMethod 2 21 tonnes CO2 = 1 tonne CH4 (IPCC 1996)Method 3 310 tonnes CO2 = 1 tonne N2O (IPCC 1996)
Base case system GHG summary (Baseline)
Fuel mixCO2 emission
factorCH4 emission
factorN2O emission
factorFuel
consumptionGHG emission
factor GHG emissionFuel type % kg/GJ kg/GJ kg/GJ MWh tCO2/MWh tCO2Natural gas 100.0% 1,668 0.179 299Total 100.0% 1,668 0.179 299
Proposed case system GHG summary (Energy efficiency measures project)
Fuel mixCO2 emission
factorCH4 emission
factorN2O emission
factorFuel
consumptionGHG emission
factor GHG emissionFuel type % kg/GJ kg/GJ kg/GJ MWh tCO2/MWh tCO2Natural gas 100.0% 922 0.179 165Total 100.0% 922 0.179 165
Total 165
GHG emission reduction summary
Years of occurrence
Base caseGHG emission
Proposed caseGHG emission
Gross annualGHG emission
reductionGHG credits
transaction fee
Net annualGHG emission
reductionyr tCO2 tCO2 tCO2 % tCO2
1 to -1 299 165 134 134
Net annual GHG emission reduction 134 tCO2 is equivalent to 27.2
RETScreen Emission Reduction Analysis - Energy efficiency measures project
Cars & light trucks not used
T&D losses
Energy efficiency measures project
Financial parameters Project costs and savings/income summary Yearly cash flowsGeneral Year Pre-tax After-tax Cumulative
Fuel cost escalation rate % 2.0% 0.0% $ 0 # $ $ $Inflation rate % 2.0% 0.0% $ 0 0 -60,000 -60,000 -60,000Discount rate % 12.0% 0.0% $ 0 1 29,232 29,232 -30,768Project life yr 40 0.0% $ 0 2 29,817 29,817 -951
0.0% $ 0 3 30,413 30,413 29,463Finance 0.0% $ 0 4 31,022 31,022 60,484
Incentives and grants $ 0.0% $ 0 5 31,642 31,642 92,126Debt ratio % 100.0% $ 60,000 6 32,275 32,275 124,401Debt $ 0 0.0% $ 0 7 32,920 32,920 157,321Equity $ 60,000 100.0% $ 60,000 8 33,579 33,579 190,900Debt interest rate % 9 34,250 34,250 225,150Debt term yr $ 0 10 34,935 34,935 260,086Debt payments $/yr 0 11 35,634 35,634 295,720
12 36,347 36,347 332,066$ 0 13 37,074 37,074 369,140
Income tax analysis $ 35,419 14 37,815 37,815 406,955Effective income tax rate % $ 0 15 38,571 38,571 445,527Loss carryforward? $ 35,419 16 39,343 39,343 484,869Depreciation method 17 40,130 40,130 524,999Half-year rule - year 1 yes/no Yes 18 40,932 40,932 565,931Depreciation tax basis % $ 0 19 41,751 41,751 607,682Depreciation rate % $ 0 20 42,586 42,586 650,268Depreciation period yr 15 $ 0 21 43,438 43,438 693,706Tax holiday available? yes/no No 22 44,306 44,306 738,012Tax holiday duration yr 23 45,193 45,193 783,205
$ 64,078 24 46,096 46,096 829,301Annual income $ 0 25 47,018 47,018 876,320Electricity export income $ 0 26 47,959 47,959 924,279
Electricity exported to grid MWh 0 $ 0 27 48,918 48,918 973,196Electricity export rate $/MWh 0.00 $ 0 28 49,896 49,896 1,023,093Electricity export income $ 0 $ 0 29 50,894 50,894 1,073,987Electricity export escalation rate % $ 64,078 30 51,912 51,912 1,125,899
31 52,950 52,950 1,178,849GHG reduction income 32 54,009 54,009 1,232,858
tCO2/yr 0 33 55,089 55,089 1,287,948Net GHG reduction tCO2/yr 134 Financial viability 34 56,191 56,191 1,344,139Net GHG reduction - 40 yrs tCO2 5,342 % 50.7% 35 57,315 57,315 1,401,454GHG reduction credit rate $/tCO2 % 50.7% 36 58,461 58,461 1,459,916GHG reduction income $ 0 37 59,631 59,631 1,519,546GHG reduction credit duration yr % 50.7% 38 60,823 60,823 1,580,370Net GHG reduction - 0 yrs tCO2 0 % 50.7% 39 62,040 62,040 1,642,409GHG reduction credit escalation rate % 40 63,281 63,281 1,705,690
yr 2.1 41 0 0 1,705,690Customer premium income (rebate) yr 2.0 42 0 0 1,705,690
Electricity premium (rebate) % 43 0 0 1,705,690Electricity premium income (rebate) $ 0 $ 225,387 44 0 0 1,705,690Heating premium (rebate) % $/yr 27,340 45 0 0 1,705,690Heating premium income (rebate) $ 0 46 0 0 1,705,690Cooling premium (rebate) % 4.76 47 0 0 1,705,690Cooling premium income (rebate) $ 0 No debt 48 0 0 1,705,690Customer premium income (rebate) $ 0 $/MWh -791.21 49 0 0 1,705,690
$/tCO2 (205) 50 0 0 1,705,690Other income (cost)
Energy MWh Cumulative cash flows graphRate $/MWhOther income (cost) $ 0Duration yrEscalation rate %
Clean Energy (CE) production incomeCE production MWh 922CE production credit rate $/kWhCE production income $ 0CE production credit duration yrCE production credit escalation rate %
Fuel type
Energy delivered
(MWh) Clean energy1 Natural gas 922 Yes2 No3 No4 No5 No6 No7 No8 No9 No# No# No# No# No# No# No# No# No# No Year
After-tax IRR - equityAfter-tax IRR - assets
Total initial costs
Customer premium income (rebate)Other income (cost) - yrsCE production income - yrsTotal annual savings and income
Annual savings and incomeFuel cost - base caseElectricity export incomeGHG reduction income - 0 yrs
Debt payments - 0 yrs
End of project life - cost
Total annual costs
Periodic costs (credits)
O&MFuel cost - proposed case
RETScreen Financial Analysis - Energy efficiency measures project
No
Annual costs and debt payments
Cooling system
Energy efficiency measuresUser-defined
Balance of system & misc.
Incentives and grants
Declining balance
Cum
ulat
ive
cash
flow
s ($
)
Initial costsFeasibility studyDevelopmentEngineeringPower systemHeating system
Pre-tax IRR - equityPre-tax IRR - assets
Simple paybackEquity payback
Debt service coverageEnergy production costGHG reduction cost
Net Present Value (NPV)Annual life cycle savings
Benefit-Cost (B-C) ratio
-200,000
0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
1,800,000
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
Method 1 Method 2
Level 1: Basic information:
99,000 kW (99 MW)
Cost @ $1,900/kW
Capacity factor @ 26%
0% escalation rate (inflation)
O&M Costs $7M/yr
Scenario 1: Open Market
Electricity rate @ $0.05/kWh
Scenario 2: Green Policy Push
$0.12/kWh feed-in tariff (FiT)
or $0.05/kWh + $15/tonne GHG emissions trade
Level 2 (Energy model sheet) analysis Calculate capacity factor:
• Long Point climate data• Ontario Wind Resource Atlas• Vestas V82-1.65 MW – 78M
Photo credit: http://www.flickr.com/photos/cseeman/2725958511/sizes/z/in/set-72157606506379582/
Software Demo: Wind Energy Project
Assignment:Power – Photovoltaic – Feed-in Tariff – Policy / Canada
Photo Credit: Carmanah Solar
Case Study AssignmentThe government of the province of Ontario, Canada aims to significantly increase private-sector investment in clean energy in the province. You are involved in the policy analysis process and are tasked with investigating three possible options for the electricity export rate paid to developers of photovoltaic (PV) power projects. For the purposes of this assignment, assume that the “hurdle rate,” or minimum acceptable pre-tax Internal Rate of Return (IRR) on equity, should be at least 12% in order to provide sufficient incentive to private developers to engage in the process.
For each policy option, determine the IRR and compare it with the hurdle rate. Consider the level of motivation to develop projects that you might expect from private developers under each option (based strictly on the rate of return), and whether or not the chosen tariff rate will generate excessive profit (i.e., have an IRR significantly in excess of that required to stimulate private developer interest). Finally, make a recommendation as to which policy option is the most promising for further investigation and development.
Site InformationA site located slightly north of Toronto is chosen to be representative for the program. A 50 kW rooftop PV installation with a 14% capacity factor is assumed to be a typical system for the purpose of this analysis.
Financial InformationYou may assume the following financial information: installed cost of $7,000/kW; project life of 20 years; 70% debt financing at 7% interest over 15 years. As a first approximation, assume the operations and maintenance costs to be zero.
Policy Option 1: No incentive beyond typical market rates paid to electricity producers. Assume an electricity export rate of $0.050/kWh.Policy Option 2: Electricity export rate of $0.420/kWh. Policy Option 3: Electricity export rate of $0.713/kWh.
Bonus Question: Calculate the capacity factor
Scenario Results Option 1 Option 2 Option 3
Pre-tax IRR on equity (%)
Pre-tax IRR on assets (%)
Simple payback (yr)
Equity payback (yr)
Assignment: DiscussionPower – Photovoltaic – Feed-in Tariff – Policy / Canada
Facility Types
Commercial & Institutional Buildings
Houses & Apartment Buildings
Both New & Existing Facilities
Industrial Plants & Processes
Photo: NRCan Photo: NRCan
RETScreen Energy Efficiency Model
Base case vs. proposed case
Steps:
1. Fuel & schedules
2. Facility characteristics(energy + costs)
3. Summary (energy)
4. Emission analysis
5. Financial analysis
Fuels & schedules Show data
Fuel Fuel type 1 Fuel type 2 Fuel type 3 Fuel type 4 Fuel type 5 Fuel type 6Fuel type Electricity Natural gas - m³Fuel consumption - unit MWh m³ #N/A #N/A #N/A #N/AFuel rate - unit $/kWh $/m³ #N/A #N/A #N/A #N/AFuel rate 0.100 0.400
Schedule Unit Schedule 1 Schedule 2 Schedule 3 Schedule 4 Schedule 5 Schedule 6Description 24/7
Occupied Occupied Occupied Occupied OccupiedTemperature - space heating °C 23.0 21.0Temperature - space cooling °C 23.0 24.0
Unoccupied Unoccupied Unoccupied Unoccupied UnoccupiedTemperature - unoccupied +/-°C 3.0
Occupied Occupied Occupied Occupied OccupiedOccupancy rate - daily h/d h/d h/d h/d h/d h/d
Monday 24 18.0Tuesday 24 18.0Wednesday 24 18.0Thursday 24 18.0Friday 24 18.0Saturday 24 18.0Sunday 24 18.0
Occupancy rate - annual h/yr 8,760 6,570 0 0 0 0% 100% 75% 0% 0% 0% 0%
Heating/cooling changeover temperature °C 16.0Length of heating season d 242Length of cooling season d 123
Facility characteristics Show data
Show: Heating Cooling ElectricityIncremental initial costs
Fuel cost savings
Incremental O&M savings Simple payback
Include measure?
Fuel saved GJ GJ GJ $ $ $ yrHeating systemBoiler 0 - - 0 0 0 -Cooling systemAir-conditioning - 0 - 0 0 0 -Building envelopeAppartment building 2,686 0 - 60,000 28,659 0 2.1VentilationLightsElectrical equipmentHot waterOtherTotal 2,686 0 0 60,000 28,659 0 2.09
Summary Show data
Fuel type
Fuel consumption -
unit Fuel rateFuel
consumption Fuel costFuel
consumption Fuel cost Fuel savedFuel cost savings
Natural gas m³ 0.400$ 160,194.2 64,078$ 88,546.3 35,419$ 71,647.8 28,659$ Total 64,078$ 35,419$ 28,659$
Project verificationFuel
consumptionFuel type Base caseNatural gas m³ 160,194.2
Heating Cooling Electricity TotalEnergy GJ GJ GJ GJEnergy - base case 4,204 0 0 4,204Energy - proposed case 2,324 0 0 2,324Energy saved 1,880 0 0 1,880Energy saved - % 44.7% 44.7%
BenchmarkEnergy unit kWhReference unit m² 7,500User-defined m² 2,000
Benchmark Heating Cooling Electricity TotalEnergy kWh/m² kWh/m² kWh/m² kWh/m²Energy - base case 155.7 0.0 0.0 155.7Energy - proposed case 86.1 0.0 0.0 86.1Energy saved 69.6 0.0 0.0 69.6
RETScreen Energy Model - Energy efficiency measures project
Base case Proposed case Fuel cost savingsFuel
Fuel consumption -
historical
Fuel consumption -
unit
Fuel consumption -
variance
Fuels & Schedules
Fuel types: Natural gas Propane, Kerosene Oil, Coal, etc Biomass User defined Etc.
Schedules: Heating and cooling 24/7 Occupancy dependent Set-back temperature Set-up temperature
Fuel Fuel type 1 Fuel type 2 Fuel type 3Fuel type Electricity Natural gas - m³ BiomassFuel consumption - unit MWh m³ tFuel rate - unit $/kWh $/m³ $/tFuel rate 0.100 0.400 25.000
Facility Characteristics
Heating system
Cooling system
Building envelope
Ventilation
Lights
Electrical equipment
Hot water
Pumps
Fans
Motors
Facility Characteristics
Process electricity
Process heat
Process steam
Steam losses
Heat recovery
Compressed air
Refrigeration
Other
Summary Section
Fuel summary Project verification Benchmark
BenchmarkEnergy unit kWhReference unit m² 7,500
Benchmark Heating Cooling Electricity TotalEnergy kWh/m² kWh/m² kWh/m² kWh/m²Energy - base case 112 51 66 229Energy - proposed case 74 29 18 121Energy saved 38 23 48 108
Hot Water
Apartment building 40 units
Reduce flow by 35%
Reduce supply temp from 60 to 55 oC
Heat recovery, 20% efficiency, cost $15,000
O&M (water) savings $3,000/year
Fuel switch oil to natural gas
New water heater cost $40,000
See project database template: Hot water - Apartment
Software Demo:Hot Water & Commercial Building
Demo of Commercial Building – Full facility:
Energy efficiency measures - Commercial - Model National Energy Code for Buildings
Questions?
Fuels & schedules Show data
Fuel Fuel type 1 Fuel type 2 Fuel type 3 Fuel type 4 Fuel type 5 Fuel type 6Fuel type Electricity Natural gas - m³Fuel consumption - unit MWh m³ #N/A #N/A #N/A #N/AFuel rate - unit $/kWh $/m³ #N/A #N/A #N/A #N/AFuel rate 0.100 0.400
Schedule Unit Schedule 1 Schedule 2 Schedule 3 Schedule 4 Schedule 5 Schedule 6Description 24/7
Occupied Occupied Occupied Occupied OccupiedTemperature - space heating °C 23.0 21.0Temperature - space cooling °C 23.0 24.0
Unoccupied Unoccupied Unoccupied Unoccupied UnoccupiedTemperature - unoccupied +/-°C 3.0
Occupied Occupied Occupied Occupied OccupiedOccupancy rate - daily h/d h/d h/d h/d h/d h/d
Monday 24 18.0Tuesday 24 18.0Wednesday 24 18.0Thursday 24 18.0Friday 24 18.0Saturday 24 18.0Sunday 24 18.0
Occupancy rate - annual h/yr 8,760 6,570 0 0 0 0% 100% 75% 0% 0% 0% 0%
Heating/cooling changeover temperature °C 16.0Length of heating season d 242Length of cooling season d 123
Facility characteristics Show data
Show: Heating Cooling ElectricityIncremental initial costs
Fuel cost savings
Incremental O&M savings Simple payback
Include measure?
Fuel saved GJ GJ GJ $ $ $ yrHeating systemBoiler 0 - - 0 0 0 -Cooling systemAir-conditioning - 0 - 0 0 0 -Building envelopeAppartment building 2,686 0 - 60,000 28,659 0 2.1VentilationLightsElectrical equipmentHot waterOtherTotal 2,686 0 0 60,000 28,659 0 2.09
Summary Show data
Fuel type
Fuel consumption -
unit Fuel rateFuel
consumption Fuel costFuel
consumption Fuel cost Fuel savedFuel cost savings
Natural gas m³ 0.400$ 160,194.2 64,078$ 88,546.3 35,419$ 71,647.8 28,659$ Total 64,078$ 35,419$ 28,659$
Project verificationFuel
consumptionFuel type Base caseNatural gas m³ 160,194.2
Heating Cooling Electricity TotalEnergy GJ GJ GJ GJEnergy - base case 4,204 0 0 4,204Energy - proposed case 2,324 0 0 2,324Energy saved 1,880 0 0 1,880Energy saved - % 44.7% 44.7%
BenchmarkEnergy unit kWhReference unit m² 7,500User-defined m² 2,000
Benchmark Heating Cooling Electricity TotalEnergy kWh/m² kWh/m² kWh/m² kWh/m²Energy - base case 155.7 0.0 0.0 155.7Energy - proposed case 86.1 0.0 0.0 86.1Energy saved 69.6 0.0 0.0 69.6
RETScreen Energy Model - Energy efficiency measures project
Base case Proposed case Fuel cost savingsFuel
Fuel consumption -
historical
Fuel consumption -
unit
Fuel consumption -
variance