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A CASE STUDY in actual energy conservation

A CASE STUDY in actual energy conservation. Presented By Energy-Environment-Economics LLC E3. What is a Kilo-Watt (kW)? A Kilo-Watt Hour? . What is it? A Kilo-Watt-Hour? 2500 square foot house uses approximately 10 kW What is it worth? .10$/kWh? 10-15$ per kW?

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A CASE STUDY in actual energy conservation

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  1. A CASE STUDY in actualenergy conservation Presented By Energy-Environment-EconomicsLLC E3

  2. What is a Kilo-Watt (kW)? A Kilo-Watt Hour? • What is it? A Kilo-Watt-Hour? • 2500 square foot house uses approximately 10 kW • What is it worth? • .10$/kWh? • 10-15$ per kW? • If energy costs remained constant over the years, nobody would be at this presentation and all of these system types would still be in vogue • Double duct systems • Multi-zone air handling units • Constant flow air and water systems • No energy management capabilities

  3. Commissioning Design Phase Construction Phase Acceptance Phase

  4. Commissioning Defined???? • ????????? • No Industry Standards • To some it is a glorified Test and Balance job • To some it is a point to point verification • To others it is a “installed per the CD’s” process

  5. What Commissioning is NOT • Systems Optimization • Problem solving • Operation and Maintenance cost control • The biggest bang for your energy buck, environment buck, or economic buck (E3 that is) • The final destination on your HVAC Systems Energy Conservation journey

  6. What is OptimissioningSM?? • Combination of Commissioning and Systems Optimization • Identifies pre-existing system deficiencies and develops protocols for remediation • Saves energy by fixing your problems, then and only then can the system be optimized for further energy savings

  7. WAATS CMSB - How did it all start? • Inability to use the p/f heat exchanger • Excessive utility costs • Data Rooms temperature and humidity control problems • Bentley Engineering report concluded • Save $$ by adding more capacity???? • Already had 3 times the actual required capacity

  8. Facility Description • Built in 1992 • Houses 2 simulator bays with 2 helicopter simulators each; supporting Data Rooms with Liebert CRAC units • 2nd floor office/training/conference areas • 3 chillers/towers/pumps • Hot/chilled water air handling units • Variable air and water flows • BacNet DDC system

  9. Pre and Post OptimissioningSM Energy Consumption • The following slides graphically illustrate energy consumption of the facility. We believe no explanation is necessary, except to say that the results – nearly a 50% reduction in KW and KwH consumption – are nothing short of spectacular considering that only the HVAC component of the facility’s energy consumption was addressed

  10. CMSB Energy Usage 2003-2005

  11. CMSB Energy Usage 2003-2005

  12. CMSB Energy Usage 2003-2005

  13. CMSB Energy Usage 2003-2005

  14. Cooling Degree Days

  15. Chilled Water System before

  16. Chilled Water System before

  17. Chilled water system current status • One chiller system now satisfies the building, saving approximately 250 kW • Turned off 6 Liebert CRAC’s, even during plate/frame operation, saving another 30 kW • Plate/frame used 4-5 months/year • DDC system in complete automatic, all setpoints optimized • Expected to save approximately 1,200,000kWh this year

  18. What does it take? • Leadership • Vision • Talent • Experience • Thinking outside the box • COMMITTMENT

  19. Other benefits??? • Besides reduced energy costs • Extended system life expectancy - all 3 chillers at CMSB with 30,000+ hours each, only one was ever required • Improved space conditions • Reduced O&M costs • More $$ for energy projects, including renewable energy projects

  20. Commissioning • First step • Identifies existing O & M deficiencies • Necessary to develop OptimissioningSM plan • 5-10% savings from straight commissioning • latest from CCC - 1.2 million s.f., saves 62K$ • Minimum of 30% from OptimissioningSM

  21. Retro-Commissioning • A process to commission existing buildings • Will identify problems • Will result in $$ savings • Is NOT Systems Optimization • Will identify functional issues, will not develop the engineering required to provide solutions • Will evaluate EMCS (if existing) point-to point communication, will not evaluate performance of controls sequences

  22. A combination of commissioning and systems optimization Savings 3-5 times traditional commissioning Specialized skill set required systems acumen troubleshooting skills controls expertise engineering talent OptimissioningSM

  23. Typical Characteristics of Troubled Systems • Inability to maintain design supply chilled water temperature during any occupied hour of the year • Constant hot/cold complaints • Out of capacity without adding square feet? • LARGE power bills? • Excessive maintenance costs

  24. Low system DT’s are a capacity and energy conservation cancer • Delta T is the difference between entering and leaving chilled water • Low (less than design) results in loss of capacity, temperature and humidity control problems • Reasons vary, but typically is a misunderstood phenomenon • Default response is to almost always add more capacity – is unnecessary and expensive

  25. Thanks again for your time!! Energy-Environment-Economics.LLC www.e3-az.com ethree1@cox.net

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