Affordable Retrofit Technology to Reduce Costs and Enhance the Flexibility of Your Office Building (Tom Myers) - ULI fall meeting - 102611

October 26, 2011 ULI Fall Conference

Affordable Retrofit Technology to Reduce Energy Costs and Enhance the Flexibility of Your Office

Building

Tom Myers, Director - Commercial Real Estate Solutions,Lutron Electronics Co., Inc.

Dana Schneider, Vice President, Energy and Sustainability ServicesJones Lang LaSalle


Agenda

• Why focus on lighting control retrofits?• How to reduce lighting energy use.• Common control retrofit opportunities

– how new technology makes it possible

• Total installed costs:– old “wired” technology vs. new wireless solutions

• Expanding control to HVAC and plug-loads• Retrofit of the Empire State Building:

– advancements in lighting design and control solutions– cost comparisons and return-on-investment

• Questions, comments


Why focus on lighting?

Light controls can save 60% or more of the lighting energy used in Commercial buildings


Three fundamentals:

1. Reduce light power density (watts)– adopt efficient lamps and fixtures

2. Minimize the amount of time lights are “on” (hours)– Lights “on” only when they need to be “on”

3. Optimize the light levels when lights need to be “on” (watts)– “active” optimization of light output

Reducing lighting energy use (watt-hours)



1. Reduce light power density (watts)• adopt efficient lamps and fixtures



2. Minimize the amount of time lights are “on” (hours)• control the hours your lights are “on”

Central Time Clock

Occupancy / Vacancy Sensors



3. Optimize the light levels when lights need to be “on” (watts)• “active” optimization of light output

- High-end tuning

- Daylight Harvesting

- Personal control



3. Optimize the light levels when lights need to be “on” (watts)• “active” optimization of light output

00

10

10

20 30 40 50 60 70 80 90

90

80

70

60

50

40

30

20

Light (%)

Ene

rgy

Usa

g e (

%)


Common control retrofit opportunity

• Goal:– Add an effective occupancy sensor

to an existing space

• Situation:– existing light switch at entrance

– no occupancy sensor installed

– wrong sensor installed in the wrong location


Common control retrofit opportunity

• Solution:– ceiling mounted motion sensor


Ceiling mounted motion sensor; the cost

• Total installed costs = $565.00

Installation labor = $425.00Materials = $140


Control retrofit solution – wireless technology

• Goal:– reduce installed costs by

reducing installation labor

• Solution:– wireless sensors and controls








Wireless Ceiling mounted motion sensor, cost

• Total installed costs = $160 to $350

Installation labor < $190.00Materials = $160.00

or


Ceiling mounted motion sensor, costs

$300

$600

wirelesswired

material

labor

installed costs



• Solution:– adding daylighting control



• Solution: adding daylighting control



• Solution: adding “phantom load” control









• Solution: adding control of HVAC equipment

HVAC


Scalable Expandable Solutions – Tenant Space

Lighting Control Panel


Scalable Expandable Solutions – Tenant Space


Scalable Expandable Solutions – Stairwells






Retrofit of the Empire State Building

Design and Construction of Tenant Pre-Built Spaces


44

Reduce energy use by 38 percent

Annual savings of $4.4M

3.1 year payback

Reduce carbon emissions 105,000 metric tons

Energy Star 90

LEED EBOM Gold

Energy Performance Contract

Quantifiable transparent results

Serve as a model for owners of existing buildings

The Empire State Building: A groundbreaking energy and sustainability program



• Goals for tenant pre-built projects:

– enhance performance while reducing renovation costs

– reduce the cost and time required for future tenant improvements



• Goals:



– no compromise on tenant service and comfort



• Goals:



– no compromise on tenant service and comfort

– adopt solutions that integrate & interoperate with other building systems.


Advancements in design and performance






Installed Costs & Return on Investment

2Light Fixtures & Controls

Labor

installed costs

($ / sf)

1.0 w/sf

wired

4

6

8

10



2Light Fixtures & Controls

Labor

installed costs

($ / sf)

.7 w/sf1.0 w/sf

wired wired

4

6

8

10



2

wireless

Light Fixtures & Controls

Labor

installed costs

($ / sf)

.7 w/sf .7 w/sf1.0 w/sf

wired wired

4

6

8

10



2

wireless

Light Fixtures & Controls

Labor

installed costs

($ / sf)

.7 w/sf .7 w/sf1.0 w/sf

wired wired

2.75 yrs

6 yrs

4

6

8

10

payback period


Reduced costs of tenant improvements

Controls and light fixtures are reconfigured with iPod or PC


1. Reduced design light power density by 30%• from 1.0 watts/sf to 0.7 watts/sf• adopted T5HO fluorescent lamps vs. T8 lamps• LED fixtures adopted in entrance areas

2. Minimized the amount of time lights are “on”• occupancy and vacancy sensors in all spaces

3. Reduced average lighting power by 50%• daylighting control: automatically dim lights in

response to available daylight.• average lighting power reduced from 0.7 to

0.35 watts per sq. ft. of tenant space.

4. Reduced the payback period by 55%• from 6 years to 2.75 years



1. HVAC• VAV• Demand Controlled Ventilation• Right-size equipment

2. BMS• Controllability for comfort and efficiency

3. Plug Loads• Desk Loads• Equipment – Energy Star• IT – IDF Closets, Data Centers

4. Tenant Engagement

5. Submetering



• Engage you design team and contractors

– assure accurate, clear design– train contractors:

• prior to bid-day

• assure proper installation

• Select established vendors– factory commissioning and service

What we’ve learned


Affordable Retrofit Technology to Reduce Energy Costs and Enhance the Flexibility of Your Office

Building

Questions&

Comments


Higher performance, increased profits

Business

Affordable Retrofit Technology to Reduce Costs and Enhance the Flexibility of Your Office Building (Tom Myers) - ULI fall meeting - 102611