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A CASE STUDY in actual energy conservation

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1 A CASE STUDY in actual energy conservation
Presented By Energy-Environment-EconomicsLLC E3 Re-enginissioning is of course is my feeble attempt to be clever and combine re-commissioning and re-engineering into a word. The case study i will be citing will discuss the reasons why both skills- engineering and commissioning - were needed to solve the myriad of problems we encountered. And i will also discuss why it is that to be able to perform this type of work you will need a team that has these requisite skills in both fields PLUS several others, most notably of interest to you would be that of T&B. But it can be done, and be done in an industry as challenging and regimented as health care. And it can be done quite profitably.

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 Design Phase Construction Phase Acceptance Phase
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 SO HAVING GOTTEN THRU THE WHY'S OF RE-ENGINEERING AND RE-COMMISSIONING, LET'S TALK ABOUT HOW THESE CONCEPTS WERE APPLIED TO A FACILITY THAT WAS FUBAR. ACCORDING TO MY ESTEEMED FRIND AND TBE THAT WAS INTIMATELY INVOLVED FROM START TI FINISH, THIS WAS THE WORST FACILITY HE HAD SEEN IN HIS SOME 30 YEARS IN THE INDUSTRY. NOW THATS SAYING SOMETHING BECAUSE WE HAVE ALL SEEN SOME PRETTY AWFUL THINGS IN OUR CAREERS I'M SURE. u will see as we describe the condition of the hospital that it was obviously built on ancient sacred burial ground, as was proven by the mysterious pipe break and corresponding flood just hours before performing their first surgery. that crisis no doubt contributed to the condition of the building prior to our involvement, but it certainly does not and should not excuse the very serious and potentially deadly nature of the deficiencies. my point is that having a client that is conscientious, knowledgeable and committed to doing the right thing was essential in the development of this project. We certainly had such a client and i believe we QUALIFIED this very early on. qualifying leads is something i think has become a lost art and is something that needs to be stressed and taught to your sales staffs - that being the art of qualifying. so qualify your leads on these types of opportunities.

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

11 CMSB Energy Usage

12 CMSB Energy Usage

13 CMSB Energy Usage

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 1,200,000 kWh 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 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 OptimissioningSM 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

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 I KNOW AN OFFICE BUILDING THAT COULD, BUT UNFORTUNATELY THEY COULD NEVER SHUT THE SYSTEM OFF OR OUT IT INTO SETBACK BECAUSE IT COULDNT RECOVER NEARLY FAST ENOUGH. WHAT DID THE ENGINEER DO? ADDED MORE CAPACITY. MADE SENS BUT WASNT THE PROBLEM

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!!

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