Download - Business Energy Efficiency
20/08/2013
1
3E Energy Efficiency Forum
Business Energy Efficiency (Common Measures)
Presented by Anoop Gupta
www.steplight.com.au
Equipment types covered today
HVAC
Refrigeration
Hot Water Systems
Air Compressors
Office Equipment
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20/08/2013
2
Heating, ventilation & air
conditioning (HVAC)
Keep HVAC systems regularly maintained
Keep fans, filters and coils clean, change worn belts & fans, repair refrigerant
insulation and pipe leakages.
Poorly maintained equipment can double energy costs in HVAC.
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HVAC
Minimise heat-producing equipment
All electrical equipment generates heat, which works against air-conditioners in
summer.
Relocate office equipment, refrigerators, vending machines, water coolers etc to
naturally-cooled rooms to save on cooling costs.
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20/08/2013
3
HVAC
Ensure thermostat temperatures are set
correctly
Summer settings should be around 24°C and
winter settings around 20°C. Every degree
cooler in summer and warmer in winter will
increase energy consumption by 10%.
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HVAC
Use ceiling or floor fans when A/C units
are on.
Will enable you to raise the thermostat
setting a degree or two compared to
your normal setting. Fans will also help
to better circulate the cooled air.
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20/08/2013
4
HVAC
Install window tinting or external
shading to block out direct sunlight.
Direct sunlight can cause rooms to
overheat and air-conditioning systems
to over-cycle. Solar tinting film and
shading can reduce heat gain through
windows by up to 80%, which will
reduce the need for air-conditioning.
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Refrigeration
Keep refrigerator doors closed.
Cooled air is quickly lost when
refrigerator doors are open. Install
plastic strip curtains if doors need to
stay open for extended periods.
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20/08/2013
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Refrigeration
Check door seals regularly.
Poor door seals can go unnoticed for
long periods of time if the door is not
checked regularly. Replace worn or
damaged seals as soon as possible.
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Refrigeration
Switch off drinks fridges at night.
(non-perishables only)
Non-perishable drinks need not be kept chilled overnight. A simple timer switch
can be used to power fridges off outside trading hours.
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20/08/2013
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Refrigeration
Ensure display fridges and under-bar fridges have self-closing doors.
Energy is wasted when display fridge doors are left open. Self-closing hinges
can be retrofitted. Choose models that have this feature when buying new
appliances.
Refrigeration
Install insulated covers on refrigerators,
cool rooms and freezers.
Insulated covers provide an extra layer
of insulation that can be tailor made to
fit existing cool rooms and displays.
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20/08/2013
7
Hot Water Systems
Switch off hot water systems when
not in use.
Use a timer switch to turn off electric
storage systems after hours.
Switch to off-peak hot water for
larger storage systems when usage is
over 160L per day.
Peak tariff
Off-peak tariff
Hot Water Systems
Reduce hot water usage.
Install low-flow showerheads on showers
and flow regulators on taps and
dishwashing attachments. If hot water is
used for cleaning, fill buckets instead of
using hoses.
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20/08/2013
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Hot Water Systems
Reduce hot water temperature.
Many hot water systems are set at too
high a temperature. Water temperature
can be reduced to 60-65°C using a
thermostat. Any lower than this can pose
a health risk.
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Hot Water Systems
Switch electric systems to gas, instant gas
or gas-boosted solar systems.
If gas is available, upgrade to a gas or gas-
boosted solar hot water system. If gas is
not available, install an electric-boosted
solar system. Instant water heaters
eliminate the need to keep reheating
stored water.
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20/08/2013
9
Air Compressors
Regularly check for leaks in the system.
Check for leaks in pipes, connectors and
joints using a leak detector. A simpler
leak detection method is to apply soapy
water to suspected areas and watch for
bubbles. System leaks can easily add up
to 30% more energy cost.
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Air Compressors
Keep intake air temperature cool.
Operating a compressor in hot areas
increases energy consumption. Move
the compressor outside, or duct the
outside air directly into the compressor
intake. A 10°C drop in intake air
temperature will reduce energy
consumption by 5%.
20/08/2013
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Air Compressors
When replacing compressors, choose the
right type for the job.
•Screw compressor - constant loads
•Reciprocating (piston) compressor - small,
intermittent loads.
•Centrifugal compressor - larger applications.
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Air Compressors
Install variable speed drives.
VSD’s can be used to good effect in air
compressors where running hours are long
with a high proportion of usage in the mid to
low-capacity range.
Up to 50% energy savings are possible.
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20/08/2013
11
Office Equipment
Switch equipment off at the power point.
Many appliances use standby power even
when they are not being used for their
primary purpose. Switching off equipment at
the power point overnight and on weekends
can save up to 20% of total energy use. Remote-control switch
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Office Equipment
Use energy saving settings on computers.
Monitors and hard disks can be
automatically switched to low power
modes after periods of inactivity. Most
monitors use 10% power in standby or
sleep mode, while most hard disks use
only 5%.
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20/08/2013
12
Office Equipment
Switch to low resolution print
settings.
Printing at 300dpi instead of 600dpi
saves toner and environmental
waste.
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Office Equipment
Build an energy efficient culture
Set good energy efficiency policy
then train staff, evaluate
performance and reward good
behaviour.
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20/08/2013
13
Next steps…Measure and monitor energy use.
Great low-cost way to find out
where energy is being used in your
business.
Learning how to do this will help
you remain energy efficient for the
rest of your life.
Order these and other
products at
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Next steps…
Register for a free workshop
&
a free energy audit
3eproject.org.au