ENERGY MANAGEMENT TECHNIQUES GROUP 3 BY JERIN ANTONY
ENERGY MANAGEMENT
TECHNIQUESGROUP 3
BY JERIN ANTONY
ENERGY MANAGEMENT
Energy management is the process of monitoring, controlling, and
conserving energy in a building or organization
THE GLOBAL NEED TO SAVE ENERGY Reduce the damage that we're
doing to our planet, Earth. As a human race we would probably find things rather difficult without the Earth, so it makes good sense to try to make it last.
Reduce our dependence on the fossil fuels that are becoming increasingly limited in supply.
CONTROLLING AND REDUCING ENERGY CONSUMPTION AT YOUR ORGANIZATION
Reduce costs – this is becoming increasingly important as energy costs rise.
Reduce carbon emissions and the environmental damage that they cause - as well as
the cost-related implications of carbon taxes and the like, your organization may be
keen to reduce its carbon footprint to promote a green, sustainable image. Not least
because promoting such an image is often good for the bottom line.
Reduce risk – the more energy you consume, the greater the risk that energy price
increases or supply shortages could seriously affect your profitability, or even make it
impossible for your business/organization to continue. With energy management you
can reduce this risk by reducing your demand for energy and by controlling it so as to
make it more predictable
HOW BEST TO MANAGE YOUR ENERGY CONSUMPTION
1. Metering your energy consumption and collecting the data
2. Finding and quantifying opportunities to save energy
3. Targeting the opportunities to save energy
4. Tracking your progress at saving energy
ENERGY SAVING TIPS there are some relatively simple techniques that can reduce
your company’s energy consumption, lower costs, and advance your conservation goals
LIGHTING Replace incandescent lighting with compact fluorescent lighting indoors and
outdoors. CFL is almost four times as efficient as incandescent bulbs and lasts
about 12 times longer
For outdoor lights, use a timer or photocell so they turn off automatically
during the daylight hours
For indoor lights, adjust lighting levels to your needs with three-way lamps,
dimmer switches for overhead lights, and task lighting
Use 4-foot fluorescent fixtures with T5 or T8 lights with reflective backing on
the fixture and electronic ballasts
Take advantage of natural light by placing work areas near windows
Install occupancy sensors, so lights go off automatically in unoccupied rooms
MOTORS When purchasing a new motor choose the most energy efficient one you can
afford. Premium efficiency motors cost about 20 percent more, but can have a
relatively short payback to off-set these costs.
Motors are oversized when they power end uses that require less horsepower
than the motor is capable of producing. Select a lower power motor and
operate it at a higher load factor near optimal efficiency to help justify the
motor replacement. Motors operated at low load factors have lower power
factors, thus having less efficiency.
Optimize transmission efficiency by using synchronous belts instead of v-belts.
V-belts can slip and deteriorate reducing efficiency at higher loads.
Consider using a variable speed drive motor system instead of traditional
motors when loads vary significantly over the course of daily use.
Make sure the voltage of the motor is as close to the design limits, found on the
nameplate, as possible. Voltage at the motor that is not within the design limits
leads to a decrease in power factor. Low power factors may be monetarily
penalized by your power company.
COMPRESSED AIR You can reduce compressed air costs by analyzing compressor operation
and reducing leaks.
Use a systems approach while operating and maintaining a compressed
air system.
Compressors can be staged with controls to optimize performance.
Implement a company-wide compressed air management policy to
eliminate unnecessary uses, fixing leaks and synchronizing use with
supply and demand.
Smaller compressors can be used to operate during unoccupied periods.
HVAC(HEATING, VENTILATION AND AIR-CONDITIONING)
Reduce your facility’s load allowing the existing system to operate less
frequently.
Implementation of an energy management system can provide great savings
to your HVAC equipment.
Set zones to turn off exhaust fans when not needed and control the
temperature of spaces at night.
When purchasing new equipment, select units that are Energy Star qualified.
Consider energy recovery ventilation systems to reclaim waste energy from
exhaust and use it to condition the incoming air.
Combine a dehumidification component to your HVAC system to increase
customer or employee comfort and reduce the need for larger equipment.
REFRIGERATION Regular maintenance of refrigeration components such as coils, fans,
seals, etc. will help keep the system running at its designed efficiency level
Check temperature settings to ensure they are not lower than necessary
Keep refrigeration systems out of areas that have frequent fluctuations
in temperature - areas in direct sunlight or away from outside doors
Install a variable speed drive to control the level of refrigeration
necessary to keep items cool
Defrost cycles can be reduced by adding a sensor at the evaporator and
by running defrost at night
Use air curtain technology to seal in cool air and keep dust or other
contaminants out
THERMAL ENERGY Plug all oil leakage as leakage of one drop of oil per second amounts to a loss
of over 2000 liters/year.
Filter oil in stages. Impurities in oil affect combustion.
Incomplete combustion leads to wastage of fuel. Observe the color of smoke
emitted from chimney. Black smoke indicates improper combustion and fuel
wastage. White smoke indicates excess air and hence loss of heat. Hazy brown
smoke indicates proper combustion.
The maintenance in plant should follow the "zero leak" philosophy,
particularly in the areas of steam and utilities so that loss of energy could be
totally eliminated
BOILERS All possible attention- should be paid to control excess air by monitoring oxygen level
in flue gas and also by visual inspection of flame color.
Remove soot deposits when flue gas temperature rises 40°C above the normal. A
coating of 3mm thick soot on the heat transfer surface can cause an increase in fuel
consumption of as much as 2.5%.
Soot blowers can always be maintained in perfect working condition so that their
regular and periodic use does not suffer.
Recover heat from steam condensate. For every 6°C rise in boiler feed water
temperature through condensate return, there is 1% saving in fuel.
Improve boiler efficiency. Boilers should be monitored for flue gas losses, radiation
losses, incomplete combustion, blow down losses, excess air etc. Proper control can
decrease the consumption upto 20%.
Use only treated water in boilers. A scale formation of 1 mm
thickness on the waterside increases fuel consumption by 5-8%.
Stop steam leakage. Steam leakage from a 3 mm-diameter hole
on a pipeline carrying steam at 7kg/cm2 would waste 32 kl of fuel
oil per year amounting to a loss of Rs. 3 lakh.
Maintain steam pipe insulation. It has been estimated that a bare
steam pipe, 150 mm in diameter and 100m in length, carrying
saturated steam at 8kg/cm2 would waste 25 kl of furnace oil in a
year amounting to an annual loss of Rs. 2.5 lakh.
DIESEL GENERATING SET Maintain Diesel engines regularly.
A poorly maintained injection pump increases fuel consumption by
4gm/kWh.
Blocked filters increase fuel consumption by 2gm/kWh.
Measure fuel consumption per KWH of electricity generated regularly.
Take corrective action in case this shows a rising trend.
ENERGY MANAGEMENT CYCLE
Energy conservation… A little less now. A little more for the future……
THANK YOU…….