Energy Monitor

Conserving Energy and $

The Campus Energy Conservation Advisory Committee, chaired by Vice
Chancellor Don Wendel, assesses energy-use reduction opportunities and
guides conservation initiatives on the Urbana-Champaign campus. Student,
faculty and staff representatives from a wide range of academic and
administrative areas make up the committee, which is finalizing a campus 
energy policy. Inside Illinois will publish an occasional column reporting
the committee's work and other energy news. 

"Turn Off the Juice"

New light-switch stickers will soon be obvious to campus faculty, staff and
students. They will serve as a reminder to everyone about the importance of
conserving energy by turning off lights when rooms are unoccupied. 

Energy Consumption: A Comparison

During FY 93, the average energy use for the campus was 318,200 BTU/gross
square foot (GSF) of building area. This figure encompasses a large number
of buildings with a wide variety of uses and varying degrees of efficiency.

A comparison of Lincoln Hall and Morrill Hall illustrates academic and
laboratory use, respectively. Their gross area each is about 167,000 square
feet. Energy consumption in Lincoln Hall in FY 93 was 58,800 BTU/GSF. At
Morrill Hall the consumption was 492,500 BTU/GSF, or 8.4 times that of
Lincoln Hall. Fume hoods, make-up air systems, and laboratory related
equipment account for the increased use in Morrill Hall, typical of a
laboratory type building.

Although the consumption at Morrill Hall appears very high, several energy
conservation projects (implemented from FY 85 through FY 92) have resulted
in a 53 percent reduction in energy use from the FY 81 level. These
projects included modified controls for fume hoods, fan speeds, heating and
chilled water systems, outside air dampers and domestic hot water.

Occupancy Sensors at MEB

Occupancy sensors have been installed in the restrooms at Mechanical
Engineering Building for about six weeks. They turn the lights on when the
door is opened and (after a short time delay) turn the lights off when
there is no one in the restroom.

In the near future, O&M will be installing occupancy sensors in nine
classrooms and possibly one of the lecture halls at MEB to further test
their effectiveness and acceptability in conserving energy. Meter readings
will be taken to determine the actual savings.

Variable Speed Fans

Electronic devices for fan- and pump-motor speed controls are being
installed in new building projects such as the Grainger Engineering Library
and the addition to the Law Building. These devices vary the frequency of
motors to achieve lower speeds during low occupancy of the buildings and
thus reduce electrical usage. A motor running at one half of its full
operating speed will, in effect, use just 12 percent of the electrical
power needed for full speed.

Ten buildings received fan-speed controls in 1992 under joint funding by
the Department of Energy, and 12 more buildings are being added in 1994
under the Energy 2000 program. O&M has conducted tests on several
variable-speed devices. The devices chosen are more efficient than the
various forms of mechanical air-control schemes on the market and are more
reliable.

Ethanol in University Vehicles

The UI Car Pool has five Chevrolet Lumina sedans that run on 85 percent
ethanol alcohol. That's right, only 15 percent unleaded gasoline is used in
these cars. The "E-85" cars are essentially the same as other Luminas
except for an automatic fuel-sensing valve and stainless steel fuel tank
and fuel lines. The automatic valve (which adjusts the vehicles' operation
for different percentages of ethanol) means drivers are unaware of fuel
change effects. The garage provides E-85 fuel for other governmental agency
vehicles as needed.

All university vehicles and other equipment that can operate with 10
percent ethanol fuel blends are fueled with ethanol/gasoline (gasohol). The
university has been a leader in gasohol use even before phasing in of
ethanol fuel requirements for state vehicles.

When university vehicles are acquired, a prime consideration in their
selection is energy economy. Maintenance and repair programs at the
university garage keep vehicles and equipment operating at their peak
energy performance.

Did You Know ...

Of the total amount of energy used on campus, approximately 70 percent is
for heating and cooling.


UIUC -- Inside Illinois -- 1994/01-20-94