Fluke 975 Case Studies

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AT A GLANCE:

From the Fluke Digital Library @ www.fluke.com/library

Case Study

Energy Waste

SITUATION

• Figge Art Museum

• Industry of Art

•Davenport, Iowa

• Mark Janco, System Specialist

for ENTEC

CHALLENGE

Reduce energy consumption

SOLUTION

Improve system performance and

energy efficiency

TOOLS USED

• Fluke 87V Industrial Multimeter

• Fluke 62 Mini Infrared Thermometer

• Fluke 971 Temperature Humidity Meter

RESULTS

• Saved approximately $63,000 in

annual energy costs.

• Received a total energy incentive

of $430K

“ When we moved

into our new facility

we faced a number

of unresolved

mechanical system

issues. Not only did

ENTEC solve these

problems, but their

solution paid back

immediately in lower

energy costs and

energy efficiency

incentives.”

Bob DeBlaey,

Facilities Manager,

Figge Art Museum

Environmental control

criteria meet energy

efficiency

Meeting the Smithsonian’s envi-

ronmental control criteria meant

that the Figge would be able

to display some of the world’s

most impressive art collections.

However, energy efficiency was

just as important from both a cost

and environmental standpoint.

The museum’s new mechani-

cal systems promised to reduce

energy consumption, which

would earn the Figge approxi-

mately $400,000 in energy

efficiency incentives and save

a significant amount on annual

energy costs.

Perfecting the art

of energy efficiency

The Figge Art Museum in

Davenport, Iowa is a 114,000-

square-foot (10,591-square-

meter) building that offers space

for regional and international art

exhibits and community-oriented

educational activities.

The Figge combines aes-

thetic beauty with world-class

mechanical systems that meet

stringent Smithsonian Museum

environmental guidelines for

temperature and humidity con-

trol. These guidelines, governing

relative humidity (RH) and

temperature in exhibits and

exhibit storage spaces, were

established to prevent the degra-

dation of paint, paper, wood,

and other media used in dis-

played artwork and to prevent

damage caused by excessive

heat, cold, or moisture that

promotes the growth of mold.

The Figge Art Museum is a civic landmark that meets high standards of temperature

and humidity control.

2 Fluke Corporation Perfecting the art of energy efficiency

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Fluke. The Most Trusted Tools

in the World.

be short $100,000 on the energy

incentive money and more than

$60,000 short in annual energy

savings,” says Tom Weed, CEO

of ENTEC Services.

Improving system

performance and

energy efficiency

ENTEC suggested some HVAC

system improvements that

would allow the mechanical

and control systems to perform

as originally intended. “The most

logical idea was to get the air

in the mixing box to mix better,

but that would have required

adding mechanical equipment

to the air handling unit,” says

Mark Janco, System Specialist

for ENTEC. “There wasn’t enough

room in the museum’s mechani-

cal room so that option wasn’t

going to work.”

Since there was not adequate

physical space to overcome the

outdoor air stratification problem

in the mixing box that prevented

the proper economizer operation,

anitifreeze solution was added

to the chilled water distribution

system, eliminating the risk of

freezing the chilled water coils

while allowing the economizer

to provide “free cooling.” To

address the proper operation

of the frost prevention coils,

ENTEC built a separate frost-

prevention coil loop that is still

heated by the normal boiler hot

water loop but has antifreeze

added. That allowed them to

drop the temperature of the

incoming air to the energy

recovery wheel to 25 °F (-3.8 °C),

optimizingthe wheel’s energy-

saving properties.

Once the fix was made, The

Weidt Group agreed to conduct

an energy evaluation of the

Figge’s systems. It turned out the

improvements not only recov-

ered the remaining $100,000 of

the original incentive—they also

gained the museum an additional

$30,000 of energy efficiency

incentives. That meant the

museum received a total energy

incentive of $430K and saved

approximately $63,000 in annual

energy costs.

Not only did ENTEC solve

these problems, but their

solution paid back immediately

in lower energy costs and energy

efficiency incentives,” says

Bob DeBlaey, Facilities Manager,

Figge Art Museum.

Maintaining ideal

conditions

ENTEC’s Janco continues to per-

form regular onsite inspections

of all control systems—particu-

larly those for temperature and

humidity—using a range of Fluke

tools. He uses the Fluke 62 Mini

Infrared Thermometer to measure

the air temperature coming out of

the ducts and to verify that the

temperatures coming off the coils

in the AHUs are adequate to keep

them from freezing. He uses the

Fluke 971 Temperature Humidity

Meter to verify the humidity of

the overall exhibit space. If those

measurements show that the

temperature and/or RH values

are off, Janco uses the Fluke 971

to calibrate the controls to

bring them back within the

Smithsonian guidelines.

Janco notes that the Fluke

87V Industrial Multimeter

probably gets the most use of

all his tools. He uses it for every-

thing from checking the supply

voltage in variable speed drives

to checking fuses. “It’s probably

one of the most valuable tools

we have.”

Balancing temperatures

for energy efficiency

The museum’s HVAC system

includes an economizer that

mixes outdoor air for ventila-

tion with return air to minimize

cooling and heating costs. The

incoming air needs mechanical

cooling when it’s above 55 °F

(12.7 °C) outside and heating

if it’s below 25 °F (-3.8 °C) to

keep the museum exhibit space

around 70 °F (21 °C). The system

also includes an energy recov-

ery wheel, positioned between

incoming air and exhaust air.

As the wheel rotates, it trans-

fers energy between those two

airstreams, recovering energy

from the exhaust air and using it

to temper the outdoor air that’s

coming into the air handler.

When the air is warmer than

55 °F (12.7 °C) the chilled water

system is enabled, so when

the indoor/outdoor air mixture

flows over the cooling coil its

temperature is lowered to the

proper supply air temperature.

If the outside air is less than

25 °F (-3.8 °C), ice would likely

form on the energy recovery

wheel, reducing the air flow.

To prevent that, frost prevention

coils are located at the outdoor

air inlet to keep the air tempera-

ture entering the energy recovery

wheel above 25 °F (-3.8 °C).

Those measures, along with

some lighting measures, were

estimated to reduce energy use

enough to earn the museum

$400,000 in incentives and to

reduce heating and cooling bills

while still meeting the Smithson-

ian environmental requirements.

At least that was the plan.

Surprising developments

ENTEC Services, of Peoria,

Illinois, executed the tempera-

ture and environmental control

systems for the new museum

and continued to monitor those

systems after the facility opened.

ENTEC could tell that, although

the environmental conditions

met Smithsonian guidelines, the

museum was achieving those

requirements at a steep cost.

Based on its energy usage, the

Figge Art Museum was going to