Looking for Energy Savings In All The Right Places - Eric Oliver


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EMO Energy Solutions
Eric M. Oliver, PE, CEM, LEED-AP
Looking for Energy Savings In All The Right Places

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Looking for Energy Savings In All The Right Places - Eric Oliver

  1. 1. Eric Oliver, PE, CEM, LEED AP President EMO Energy Solutions, LLC www.emoenergy.com March 3, 2009
  2. 2. Energy Efficiency Overview US Dept of Energy CBECS
  3. 3. <ul><li>An analysis of office buildings that have earned the Energy Star label show that they cost $1.20 per sq ft to operate, compared with an average U.S. office building that operates at about $2.00 per sq ft. </li></ul><ul><ul><li>Savings of $160,000/year for 200,000 ft 2 office building </li></ul></ul><ul><li>Most packaged Energy Upgrades will have a Simple payback of 4-6 years for the investment cost </li></ul><ul><ul><li>Equivalent to a 20% IRR </li></ul></ul>
  4. 4.
  5. 5. Inside the meter…
  6. 6. For Design of New Buildings- Energy Modeling <ul><li>Tool for smart, energy efficient design </li></ul><ul><li>Predicts energy consumption of building every hour </li></ul><ul><li>Uses basic engineering/heat flow/power equations </li></ul><ul><ul><li>Conduction through walls/roof </li></ul></ul><ul><ul><li>Solar gain through windows </li></ul></ul><ul><ul><li>Calculation of all internal heat gains </li></ul></ul><ul><ul><li>Thermal mass/time lag </li></ul></ul>
  7. 7. For Existing Buildings – Perform an Energy Audit <ul><li>Utility Consumption analysis </li></ul><ul><li>Energy survey by qualified professionals </li></ul><ul><li>Identification of opportunities </li></ul><ul><li>Development of Energy Conservation Measures and Audit Report </li></ul><ul><li>Life Cycle Costs and Benefits </li></ul><ul><li>Energy Awareness presentation </li></ul>
  8. 8. <ul><li>Walk-through versus full-scale audit </li></ul><ul><li>Comprehensive energy assessment </li></ul><ul><ul><li>Performed by a qualified energy service provider </li></ul></ul><ul><ul><li>Monitor and measure </li></ul></ul><ul><ul><ul><li>Air temperatures </li></ul></ul></ul><ul><ul><ul><li>Water flow rates and temperatures </li></ul></ul></ul><ul><ul><ul><li>Electric demand of mechanical equipment </li></ul></ul></ul><ul><ul><ul><li>Run times of lighting </li></ul></ul></ul><ul><ul><li>Assess O&M strategies, interview maintenance staff </li></ul></ul><ul><ul><li>Develop detailed energy conservation measures </li></ul></ul><ul><ul><li>Onsite renewable energy opportunities </li></ul></ul><ul><ul><li>Detailed cost/savings estimates for improvements </li></ul></ul>
  9. 9. Develop Energy Conservation Measures (ECMs) <ul><li>Three-stage upgrade process </li></ul><ul><li>Stage 1: Minimize Building Loads </li></ul><ul><li>Stage 2: Improve System Effectiveness </li></ul><ul><li>Stage 3: Optimize Resource Delivery </li></ul>
  10. 10. 1. Minimize Building Loads <ul><li>This Includes: </li></ul><ul><li>Improve building envelope (R-value, heat gain/loss) </li></ul><ul><li>Reduce Internal Heat Gains </li></ul><ul><ul><li>Lighting power density (W/sqft) & usage </li></ul></ul><ul><ul><li>Equipment power density (W/sqft) & usage </li></ul></ul><ul><li>Reduce Infiltration </li></ul>
  11. 11. 2. Improve System Effectiveness <ul><li>Air Distribution </li></ul><ul><li>Cooling </li></ul><ul><li>Heating </li></ul><ul><li>Heat Recovery </li></ul><ul><li>Direct Digital Controls </li></ul><ul><li>Electrical Systems </li></ul><ul><li>Service Hot Water </li></ul><ul><li>Process Systems </li></ul>
  12. 12. 3. Optimize Resource Delivery <ul><li>Incorporate renewable energy technologies </li></ul><ul><li>Incorporate energy storage techniques </li></ul><ul><li>Investigate cogeneration </li></ul>
  13. 13. Building Envelope <ul><li>Improve Wall & Roof Construction </li></ul><ul><ul><li>Insulation levels </li></ul></ul><ul><ul><li>Surface absorption </li></ul></ul><ul><ul><li>Thermal mass </li></ul></ul><ul><li>Improve Windows </li></ul><ul><ul><li>Double Glazing or storm windows </li></ul></ul><ul><ul><li>Low-e coatings </li></ul></ul><ul><ul><li>Spectrally selective coatings </li></ul></ul><ul><ul><li>Utilize shading techniques </li></ul></ul><ul><ul><ul><li>Block solar penetration during the cooling season </li></ul></ul></ul><ul><ul><ul><li>Allow solar gain during the heating season </li></ul></ul></ul>
  14. 14. Lighting Technology
  15. 15. Air Distribution <ul><li>Variable Air Volume Energy Savings </li></ul>Constant volume 1250 cfm 1250 cfm 1250 cfm Supply 3750 cfm Variable volume 450 cfm 1050 cfm 650 cfm Supply 2150 cfm SP VSD
  16. 16. Cooling <ul><li>Spot, window, air-cooled – typically 1.0 – 1.5 kW/ton </li></ul><ul><ul><ul><li>Chillers (30-tons +) </li></ul></ul></ul><ul><ul><ul><ul><li>Before 1990: 0.9 kW/ton </li></ul></ul></ul></ul><ul><ul><ul><ul><li>1990-1995: 0.7 – 0.9 kW/ton </li></ul></ul></ul></ul><ul><ul><ul><ul><li>New HE: 0.4 - 0.6 kW/ton </li></ul></ul></ul></ul>                                                                                             
  17. 17. Heating <ul><li>Standard existing : 60% efficient 40% wasted energy </li></ul><ul><li>Standard new: 80% efficient </li></ul><ul><li>Energy efficient: up to 95% efficiency </li></ul><ul><ul><ul><li>Pulse condensing steam boilers </li></ul></ul></ul><ul><ul><ul><li>Pre-heat combustion air </li></ul></ul></ul><ul><ul><ul><li>Insulated tanks and pipes </li></ul></ul></ul><ul><ul><ul><li>Efficient burners </li></ul></ul></ul>
  18. 18. Ground Source Heat Pumps <ul><li>Closed loop pipes buried underground to transfer heat </li></ul><ul><li>Water loop heat pumps </li></ul><ul><li>provide cooling or heating </li></ul><ul><li>inside the building </li></ul><ul><li>40% to 60% less energy </li></ul><ul><li>than chiller/boiler system </li></ul>
  19. 19. Heat Recovery Strategies <ul><li>Air/air heat exchangers </li></ul><ul><ul><li>Flat plate </li></ul></ul><ul><ul><li>Enthalpy wheels </li></ul></ul><ul><ul><ul><li>Not to be used for lab exhaust </li></ul></ul></ul><ul><ul><ul><li>Transfer heat & humidity between exhaust/supply </li></ul></ul></ul><ul><li>Air/water heat exchangers </li></ul><ul><ul><li>Run-around coil loops </li></ul></ul><ul><ul><ul><li>No cross contamination </li></ul></ul></ul><ul><ul><li>Heat pipes </li></ul></ul>
  20. 20. Ways to Save Energy <ul><li>Unoccupied Settings </li></ul><ul><li>Lighting schedules </li></ul><ul><li>Chiller optimization </li></ul><ul><li>“ Enthalpy Control” </li></ul><ul><li>Boiler optimization </li></ul><ul><li>Smart controls </li></ul>Enthalpy - measure of combination of temperature and humidity of air
  21. 21. www.emoenergy.com <ul><li>Solar cells are one of the most environmentally safe ways of generating electricity </li></ul><ul><li>Installing a 1 kW photovoltaic system reduces CO 2 by over 2600 lbs annually </li></ul><ul><li>Prices are expected to decrease significantly as manufacturing techniques improve </li></ul>Brand Power Output Warranty Retail Price System Cost Siemens Solar 63W per panel 25 years $436 / panel 30.1 cents/kWh BP Solar 75W per panel 20 years $499 / panel 34.2 cents/kWh AstroPower 75W per panel 20 years $400 / panel 29.7 cents/kWh
  22. 22. Wind Power <ul><li>Where is there good wind? </li></ul>
  23. 23. Energy Tax Credits <ul><li>Solar and Wind power: </li></ul><ul><ul><li>30% tax credit of installed costs (no limits in new bill) </li></ul></ul><ul><li>New building energy efficiency credit: </li></ul><ul><ul><li>$1.80/ft 2 if Whole building is 50% more efficient than basecase based on Energy Model </li></ul></ul><ul><ul><li>Partial credits for building subsystems (Lighting, HVAC and Hot Water, or Building Shell) </li></ul></ul><ul><li>Existing building energy efficiency credit: </li></ul><ul><ul><li>$1.80/ft 2 if Lighting, or HVAC and Hot Water, or Building Shell is retrofit or replaced with a new system that is 50% more efficient than allowable by ASHRAE 90.1-2001. </li></ul></ul><ul><ul><li>Lighting is retrofit or replaced with a new lighting system that is 25% more efficient than allowable by ASHRAE 90.1-2001. </li></ul></ul>
  24. 24. Existing Building Energy Upgrade Project * with tax credits Description First Cost Annual Savings Payback Lighting Upgrade $65,000 $21,000 3.1 yr Install programmable thermostats $12,000 $8,500 1.4 yr Chiller Replacement $95,000 $27,000 3.5 yr Improve Boiler Combustion efficiency $1,500 $2,000 0.8 yr Insulate hot water pipes $3,000 $500 6.0 yr Install door thresholds $450 $140 3.2 yr Install Variable Speed Drives on fans $24,500 $9,500 2.6 yr Replace standard efficiency motors for chilled water pumping $2,300 $550 6.2 yr * Install 10 kW photovoltaic array $40,000 $1,600 25.0 yr Total $243,750 $70,790 3.4 yr
  25. 25. Thank you! <ul><li>Eric Oliver, PE, CEM, LEED AP , President </li></ul><ul><li>EMO Energy Solutions, LLC </li></ul><ul><li>www.emoenergy.com </li></ul>