advanced rtu controls
play

Advanced RTU Controls Opening up a New Retrofit Market About Energy - PowerPoint PPT Presentation

Advanced RTU Controls Opening up a New Retrofit Market About Energy 350 26 person firm based in Portland EE Program Deployment & Support Building Tuning/RCx/SEM Energy Studies Research Evaluation LEED/Green


  1. Advanced RTU Controls Opening up a New Retrofit Market

  2. About Energy 350 ➢ 26 person firm based in Portland ➢ EE Program Deployment & Support ➢ Building Tuning/RCx/SEM ➢ Energy Studies ➢ Research ➢ Evaluation ➢ LEED/Green Building Assistance 2

  3. Traditional Small Commercial • On-site consultations would recommend the usual: 3 12/17/2018

  4. Traditional Small Commercial • On-site consultations would recommend the usual: 4 12/17/2018

  5. Traditional Small Commercial • On-site consultations would recommend the usual: 5 12/17/2018

  6. Traditional Small Commercial • On-site consultations would recommend the usual: 6 12/17/2018

  7. Traditional Small Commercial • On-site consultations would recommend the usual: 7 12/17/2018

  8. The RTU Market is LARGE 66% of Buildings served by RTUs* *2012 CBECS Inventory

  9. The RTU Market is LARGE and, Energy Intensive! 66% of Buildings served by RTUs* HVAC represented 44% of end use BTUs in CBECS 2012 data *2012 CBECS Inventory

  10. Just how big is this market? PNNL estimated that if half of the existing RTU stock were retrofit, 10,000 aMW would be conserved.

  11. What is an ARC? ➢ Converts from constant volume to variable volume air supply (supply fan VFD) ➢ Optimizes free cooling/economizer control ➢ Optimizes Scheduling ➢ Demand Controlled Ventilation (DCV) 11 12/17/2018

  12. ARC Optional Add-Ons ➢ Web accessible controls ➢ Fault detection analytics ➢ Automated Demand Response 12 12/17/2018

  13. Advanced Rooftop Controls • Where have ARCs taken off? – Retail, Manufacturing, Restaurants • What are the barriers to implementation? – Out of sight, lack of awareness of the technology – Split incentive • Where should we never install an ARC? – Systems with a high thermal load-capacity ratio 13 12/17/2018

  14. Control Details 14 12/17/2018

  15. Ventilation 15 12/17/2018

  16. The results…a BIG deal 90% Savings Distribution 80% % Energy Savings 10 70% 9 60% 8 50% 7 40% Frequency 6 30% 5 20% 4 Frequency 10% 3 0% 2 2,500 3,500 4,500 5,500 6,500 7,500 8,500 1 Annual Runtime 0 20% 30% 40% 50% 60% 70% 80% 90% % Savings Median savings 57% 16 12/17/2018

  17. The Economics Simple Payback vs Operating Hours by building 14 90 80 12 70 Simple Payback (yrs) 10 60 RTU Count 8 50 40 6 30 4 20 2 10 0 0 3,261 3,640 5,110 5,543 7,636 8,292 8,760 8,760 8,760 8,760 8,760 Average Hours of Operation Simple Payback unit count Before incentives @ $0.072/kWh, only electric (kWh) savings included 17 12/17/2018

  18. 18 12/17/2018

  19. Non-Energy Benefits “…these controls took us from a reactive to a proactive mode . Before, we typically didn’t know there was a problem with a unit until we received employee complaints. Now, facilities personnel often identify issues and resolve them before occupants arrive…” Scott Bacon, Leatherman Tool Group, Portland 19 12/17/2018

  20. The Challenges Ahead • These retrofits are not going to happen on their own • ARC upgrades can’t be observed in the space (it’s not lighting or appliances • We must actively seek allies in the market to develop traction 20 12/17/2018

Recommend


More recommend