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

▶
advanced rtu controls
SMART_READER_LITE
LIVE PREVIEW

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

Nov 06, 2022 288 likes •493 views

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

slide-1
SLIDE 1

Advanced RTU Controls

Opening up a New Retrofit Market

slide-2
SLIDE 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

slide-3
SLIDE 3

Traditional Small Commercial

  • On-site consultations would recommend the

usual:

3

12/17/2018

slide-4
SLIDE 4

Traditional Small Commercial

  • On-site consultations would recommend the

usual:

4

12/17/2018

slide-5
SLIDE 5

Traditional Small Commercial

  • On-site consultations would recommend the

usual:

5

12/17/2018

slide-6
SLIDE 6

Traditional Small Commercial

  • On-site consultations would recommend the

usual:

6

12/17/2018

slide-7
SLIDE 7

Traditional Small Commercial

  • On-site consultations would recommend the

usual:

7

12/17/2018

slide-8
SLIDE 8

The RTU Market is LARGE

66% of Buildings served by RTUs*

*2012 CBECS Inventory

slide-9
SLIDE 9

The RTU Market is LARGE

66% of Buildings served by RTUs*

*2012 CBECS Inventory

and, Energy Intensive!

HVAC represented 44% of end use BTUs in CBECS 2012 data

slide-10
SLIDE 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.

slide-11
SLIDE 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

slide-12
SLIDE 12

ARC Optional Add-Ons

➢ Web accessible controls ➢ Fault detection analytics ➢ Automated Demand Response

12

12/17/2018

slide-13
SLIDE 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

slide-14
SLIDE 14

Control Details

14

12/17/2018

slide-15
SLIDE 15

Ventilation

15

12/17/2018

slide-16
SLIDE 16

The results…a BIG deal

16

12/17/2018

Median savings 57%

1 2 3 4 5 6 7 8 9 10 20% 30% 40% 50% 60% 70% 80% 90% Frequency % Savings

Savings Distribution

Frequency

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 2,500 3,500 4,500 5,500 6,500 7,500 8,500

% Energy Savings Annual Runtime

slide-17
SLIDE 17

The Economics

17

12/17/2018

10 20 30 40 50 60 70 80 90 2 4 6 8 10 12 14 3,261 3,640 5,110 5,543 7,636 8,292 8,760 8,760 8,760 8,760 8,760

RTU Count Simple Payback (yrs) Average Hours of Operation

Simple Payback vs Operating Hours

by building

Simple Payback unit count

Before incentives @ $0.072/kWh, only electric (kWh) savings included

slide-18
SLIDE 18

18

12/17/2018

slide-19
SLIDE 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

slide-20
SLIDE 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