RETScreen ®   Version 4 Energy Efficiency Gregory J. Leng, Director Urban T. Ziegler, Chief Engineer RETScreen International
Facility Types Residential, Commercial & Institutional Buildings Industrial Plants & Processes Both New & Existing Facilit...
Energy Efficiency Analysis Fuel Steps Minimize usage Maximize efficiency Optimize  supply End-use
RETScreen Energy Efficiency Model <ul><li>Base case vs. proposed case </li></ul><ul><li>Steps: </li></ul><ul><ul><li>Fuel ...
Fuels & Schedules <ul><li>Fuel types: </li></ul><ul><li>Natural gas </li></ul><ul><li>Propane, Kerosene </li></ul><ul><li>...
Facility Characteristics <ul><li>Heating system </li></ul><ul><li>Cooling system </li></ul><ul><li>Building envelope   </l...
Facility Characteristics <ul><li>Process electricity </li></ul><ul><li>Process heat </li></ul><ul><li>Process steam </li><...
Summary Section <ul><li>Fuel summary </li></ul><ul><li>Project verification   </li></ul><ul><li>Benchmark </li></ul>
Emission & Financial Analysis Method 1 Method 2
 
Project Example: Hot Water <ul><li>Apartment building 40 units </li></ul><ul><li>Reduce flow by 35% </li></ul><ul><li>Redu...
Questions? www.RETScreen.net
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RETScreen and energy efficiency

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RETScreen and energy efficiency

  1. 1. RETScreen ® Version 4 Energy Efficiency Gregory J. Leng, Director Urban T. Ziegler, Chief Engineer RETScreen International
  2. 2. Facility Types Residential, Commercial & Institutional Buildings Industrial Plants & Processes Both New & Existing Facilities
  3. 3. Energy Efficiency Analysis Fuel Steps Minimize usage Maximize efficiency Optimize supply End-use
  4. 4. RETScreen Energy Efficiency Model <ul><li>Base case vs. proposed case </li></ul><ul><li>Steps: </li></ul><ul><ul><li>Fuel & schedules </li></ul></ul><ul><ul><li>Facility characteristics </li></ul></ul><ul><ul><ul><li>(energy + costs) </li></ul></ul></ul><ul><ul><li>Summary (energy ) </li></ul></ul><ul><ul><li>Emission analysis </li></ul></ul><ul><ul><li>Financial analysis </li></ul></ul>
  5. 5. Fuels & Schedules <ul><li>Fuel types: </li></ul><ul><li>Natural gas </li></ul><ul><li>Propane, Kerosene </li></ul><ul><li>Oil, Coal, etc </li></ul><ul><li>Biomass </li></ul><ul><li>User defined </li></ul><ul><li>Etc. </li></ul><ul><li>Schedules: </li></ul><ul><li>Heating and cooling </li></ul><ul><li>24/7 </li></ul><ul><li>Occupancy dependent </li></ul><ul><li>Set-back temperature </li></ul><ul><li>Set-up temperature </li></ul>
  6. 6. Facility Characteristics <ul><li>Heating system </li></ul><ul><li>Cooling system </li></ul><ul><li>Building envelope </li></ul><ul><li>Ventilation </li></ul><ul><li>Lights </li></ul><ul><li>Electrical equipment </li></ul><ul><li>Hot water </li></ul><ul><li>Pumps </li></ul><ul><li>Fans </li></ul><ul><li>Motors </li></ul>
  7. 7. Facility Characteristics <ul><li>Process electricity </li></ul><ul><li>Process heat </li></ul><ul><li>Process steam </li></ul><ul><li>Steam losses </li></ul><ul><li>Heat recovery </li></ul><ul><li>Compressed air </li></ul><ul><li>Refrigeration </li></ul><ul><li>Other </li></ul>
  8. 8. Summary Section <ul><li>Fuel summary </li></ul><ul><li>Project verification </li></ul><ul><li>Benchmark </li></ul>
  9. 9. Emission & Financial Analysis Method 1 Method 2
  10. 11. Project Example: Hot Water <ul><li>Apartment building 40 units </li></ul><ul><li>Reduce flow by 35% </li></ul><ul><li>Reduce supply temp from 60 to 55 o C </li></ul><ul><li>Heat recovery, 20% efficiency, cost $15,000 </li></ul><ul><li>O&M (water) savings $3,000/year </li></ul><ul><li>Fuel switch oil to natural gas </li></ul><ul><li>New water heater cost $40,000 </li></ul><ul><li>See project database template: Hot water - Apartment </li></ul>
  11. 12. Questions? www.RETScreen.net

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