Retro-Commissioning: Energy Hero In Plain Sight. Kevin Gombotz, PE
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1 Retro-Commissioning: Energy Hero In Plain Sight Kevin Gombotz, PE /10/2017 Copyright Envinity,
2 Kevin Gombotz, PE Envinity Building Energy Solutions Vice President Treasure Hunter 11/10/2017 Copyright Envinity,
3 What does a hero project look like? $600,000 $500,000 $400,000 $300,000 $200,000 $100,000 $- Hospital Energy Cost Before After Direct Cost: $40,000 Savings: $85,000 / yr (15%) 6 months duration 6 month payback Paid off in same fiscal year 2 days per month staff time! 11/10/2017 Copyright Envinity,
4 Old woman or young woman? RCx: fresh set of eyes to Spot opportunity Solve problems Serve the mission 11/10/2017 Copyright Envinity,
5 Even new hospitals are slacking! 300 Energy Use By Age Hospitals 7% Energy increase kbtu/sf All Commercial Buildings 10% Energy decrease 0 Before 's 1970's 1980's 1990's 2000's Credit: 2007 and 2012 CBECs building survey, EIA 11/10/2017 Copyright Envinity,
6 Are LEED hospitals any better? Average Payback: 2.5 years Average Savings : 22% Total Cost Savings: $1.8M 35% RCx Savings 6 New Hospitals 30% Annual Savings 25% 20% 15% 10% 5% LEED LEED LEED 0% Hospital Hospital LEED certified Hospital Hospital LEED certified Hospital Hospital LEED certified 11/10/2017 Copyright Envinity,
7 LEED isn t leading Only 5% of LEED hospitals are Energy Star certified. Credit: USGBC and Energy Star online certification listings 11/10/2017 Copyright Envinity,
8 RCx can be the difference Wellspan Case Study - Rehab Hospital 73 beds, specialty surgery 146,000 square feet Built 2012 Commissioned by 3 rd Party Retro-commissioned by 4 th Party! 15% cost savings, 6 month payback Energy Star Score Energy Cost 2012 Hospital 50 $600, Before Retro- Commissioning After Retro- Commissioning $500,000 $400,000 $300,000 $200,000 $100,000 Before Retro- Commissioning After Retro- Commissioning 0 $- 11/10/2017 Copyright Envinity,
9 Is it worth fixing? Build trust through RCx Get recognized by AHA Get consistent funding $4/sf utilities x 25% savings x 5 Year Payback = $5/sf upfront investment x 500,000 sf = $2.5M investment 11/10/2017 Copyright Envinity,
10 RCx lays foundation for $$$ Path to 30% Reduction 5% Retro-commissioning 70% 25% Capital Energy Projects Improved Use 11/10/2017 Copyright Envinity,
11 Worth fixing? Joint Commission RCx Targets JACO Compliance Issues Temp and humidity Room pressure requirements (Tissue test) Final filter condition 11/10/2017 Copyright Envinity,
12 Worth fixing? Reduce work orders RCx Reduces Hot/cold calls Sweating windows Building pressurization Freeze stat trips Unplanned failures (short cycling, hunting, etc) Angry surgeons 11/10/2017 Copyright Envinity,
13 RCx Process Steps Best Payback 1. Track : Benchmarks, Trends, KPIs 2. Tune Procedures and Setpoints 3. Find and Fix Faults 4. Improve Controls Programming 5. Increase Scheduling 6. Re-engineer Airflows for Current Use 11/10/2017 Copyright Envinity,
14 1. Track : benchmarks, trends, KPIs E.g. Tracked kw/ton and CHW load improvements through BAS trend data
15 2. Tune procedures and setpoints E.g. Reduce condenser setpoint for improved part-load performance; increased economizer setpoints
16 Procedures : Let the leader lead Electric Boiler, Sterile Processing Lag Boiler 15 KW less $9,500 / yr just to make it the lead 11/10/2017 Copyright Envinity,
17 Setpoints 20 KW less chiller power Turned knob to lower tower setpoint 1 hour fix $5,000 per year 11/10/2017 Copyright Envinity,
18 3. Find and fix faults E.g. Repaired OA damper actuator on RTU serving Sterile Storage
19 Find and fix faults Inlet Temp 55F 8degF waste x x 2000 cfm / = 1.5 tons needed 3 tons supplied $2000/yr savings 11/10/2017 Copyright Envinity,
20 4. Improve controls programming E.g. add SAT reset with zone demand, pump pressure reset
21 Programming MBH Tons KW /14/2017 6/24/2017 7/4/2017 7/14/2017 7/24/2017 8/3/2017 8/13/ /14/2017 6/24/2017 7/4/2017 7/14/2017 7/24/2017 8/3/2017 8/13/ MBH $5,000/yr reheat 15 tons $4,500/yr chilled water 10 KW $9,000/yr electric 0 6/14/2017 6/24/2017 7/4/2017 7/14/2017 7/24/2017 8/3/2017 8/13/2017 Change VAV sequence to dual max to allow lower heating min: 4 hours programming $17,500/yr 11/10/2017 Copyright Envinity,
22 5. Increase scheduling Scheduling was good, but only 5% of total air. Needed to enhance. Therapy room needed a walk through mode E.g. Provide unoccupied mode Offices, Kitchen, Outpatient. Respond to operator feedback to refine mode.
23 Scheduling Total fan power Lobby Air Handler: Zone level schedule 20 hrs programming 5 KW daily average reduction $7,000 / yr savings 20 KW /25/2017 5/5/2017 5/15/2017 5/25/2017 6/4/2017 6/14/2017 6/24/ /10/2017 Copyright Envinity,
24 6. Engineer airflows for current use Reduced 9,500 cfm of SA (11%) from heating minimum by providing dual-maximum control. Modified damper and reheat sequencing. Further opportunities to re-engineer minimum flows for current use and code requirements.
25 Engineer airflows to current code Cfm /26 3/31 4/5 4/10 Airflow 4/15 4/20 4/25 4/30 5/5 Blood bank example: Designed at 30 ACH Left at 30 ACH Current code 6 ACH 4500 cfm reduction 4 hr change $11,000 / yr savings Avg Vavle % /26 3/31 4/5 4/10 4/15 4/20 4/25 4/30 5/5 Reheat Fan Energy: $ 6,504 Chilled Water: $ 1,831 Reheat: $ 2,807 TOTAL SAVINGS: $ 11,142 11/10/2017 Copyright Envinity,
26 RCx Process Interview staff about opportunities and trouble calls Document controls settings and enable trending Survey drawings and controls, follow-up with inspection Work closely controls tech and mechanic to modify Effective communication with maintenance team Document Issues Log, BAS Change Log, and trip reports 11/10/2017 Copyright Envinity,
27 Owner s strategy 11/10/2017 Copyright Envinity,
28 11/10/2017 Copyright Envinity,
29 Find a champion is it you? BTUs 11/10/2017 Copyright Envinity,
30 Build a team BTUs 11/10/2017 Copyright Envinity,
31 Tips for the owner Appoint Internal Cx Leader and Team Find a Coach Leverage Controls Service Agreement Set Aside Repair Budget Initiate a HVAC Trouble Tracking Process with Staff Provide Offsite BAS Access for Consultant / Analyst 11/10/2017 Copyright Envinity,
32 Most Important Tip! Don t save too much!!! Until you get the $$ for Capital Projects! Path to 30% Reduction 5% 25% 70% Retro-commissioning Capital Energy Projects Improved Use 11/10/2017 Copyright Envinity,
33 Thank You. Questions? Kevin Gombotz, PE Vice President of Commercial Energy Services 11/10/2017 Copyright Envinity,
34 More Examples Follow the work orders Broken dampers Leaking valves Valve conflicts. Like gas and brake One day RCx effort initiated $60,000 / yr savings Button push 11/10/2017 Copyright Envinity,
35 Benchmarks Show Potential Main Hospital Current Clinical Quality Upper 10% Rehab Current 10% savings ~$50,000 / year 11/10/2017 Copyright Envinity,
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