RETScreen and energy efficiency

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  • 1. RETScreen ® Version 4 Energy Efficiency Gregory J. Leng, Director Urban T. Ziegler, Chief Engineer RETScreen International
  • 2. Facility Types Residential, Commercial & Institutional Buildings Industrial Plants & Processes Both New & Existing Facilities
  • 3. Energy Efficiency Analysis Fuel Steps Minimize usage Maximize efficiency Optimize supply End-use
  • 4. RETScreen Energy Efficiency Model
    • Base case vs. proposed case
    • Steps:
      • Fuel & schedules
      • Facility characteristics
        • (energy + costs)
      • Summary (energy )
      • Emission analysis
      • Financial analysis
  • 5. 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
  • 6. Facility Characteristics
    • Heating system
    • Cooling system
    • Building envelope
    • Ventilation
    • Lights
    • Electrical equipment
    • Hot water
    • Pumps
    • Fans
    • Motors
  • 7. Facility Characteristics
    • Process electricity
    • Process heat
    • Process steam
    • Steam losses
    • Heat recovery
    • Compressed air
    • Refrigeration
    • Other
  • 8. Summary Section
    • Fuel summary
    • Project verification
    • Benchmark
  • 9. Emission & Financial Analysis Method 1 Method 2
  • 10.  
  • 11. Project Example: Hot Water
    • Apartment building 40 units
    • Reduce flow by 35%
    • Reduce supply temp from 60 to 55 o C
    • 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
  • 12. Questions? www.RETScreen.net