3.2.6
Electricity / Energy Conservation
Commonly 50-90% electricity
is wasted. Simple light bulb converts only less than 5% of electric energy
into light; rest goes waste as heat. Many other applications are similarly
wasteful. To avoid wasteful uses energy efficient equipments do exist in
market. Its prices are minimal compared to the cost of electricity that
is incurred. By employing the energy efficient equipment the power crisis
in South Asia can be hal2.ved. For the society it is better and cheaper
to switch over to energy efficient equipments than building new power plants
and power transmission lines. Use of other forms of energy is also wasteful,
whether it is oil, gas, firewood, or others.
Light
Compared with traditional light bulbs, the compact fluorescent lights
(CFLs) and light tubes are 4 times as efficient and new light emitting
diodes
(LEDs) are twice as efficient. Please refer Table.3.3 for examples of
traditional and efficient light sources.
Poor qualities of fluorescent lights have short life while poor quality
LEDs get weaker after some years. LEDs are fast improving, and LEDs of
old design are not as efficient as the latest types.
Fluctuation in voltage can harm all types of lighting. It reduces life
of devices. LEDs also damage when used in high temperatures without cooling.
In the following are energy conservation proposals for households, business,
and agriculture.
3.2.6.1 Electricity/Energy Conservation Tips
Tips for electricity conservation at home
- Use efficient light
and equipments.
-
Use appropriate lighting
according to requirement. A so-called zero bulb, uses 12-15 Watt
per hour. Compact fluorescent
lamps
(CFLs) are available
in 5, 7, 9, and 11 Watt capacities and they give more light output.
-
A tube light (36/40
Watt) gives more light than 60-100 Watt bulb and will consume 40-60%
less power. Tube light with electronic
choke is more
energy efficient.
-
For electric water heating
instant geysers are considered to be more efficient than storage
type geysers; but
solar water
heating
use almost
no electricity.
-
Efficient
refrigerators use only 25% of the electricity that wasteful
types use, for the same size.
-
Allow heated foodstuff to cool down
before placing it in the refrigerator.
-
Electronics consume
lot of electricity. Equipment with flat LCD screens use less
energy than old screens, while the flat Plasma
screens use more
than most of the older screens. Large screens use more
energy than
small screens. The most efficient computer screens use
20 Watt, while rest
of the computers use 50 Watt and a television (17’’ screen)
60 Watt. Much of the equipments use large part of the power
when it is turned standby. This is also true for small
devices such
as mobile phone
chargers, some telephones, etc.
-
Design houses to cool naturally
to avoid or reduce use of air-conditioning.
Tips for electricity conservation at shops and business establishments
- Use efficient equipment for light,
cooling, cooking, etc.
- Do not use electricity when less polluting/cheaper
alternatives exist such as efficient use of biomass and solar heating
for all heating /
cooking purposes.
- Design houses for natural cooling
and use only the most efficient air-conditioners.
- Avoid excessive
illumination. Keep only as many fans and lights on as you need.
- Do
not use neon signboards. Use painted signboards.
- Use energy saving
compact fluorescent lamps for the illumination of your shops, showrooms,
or hotels.
- Use solar water heaters for
hot water requirements of your hotels and lodges.
Tips for energy conservation in industrial
establishments
- Undertake regular Energy Audits and
monitor energy consumption closely.
- Use
efficient equipment for cooling, motors, ventilation, etc.
- Use
variable speed drives to run pumps, machines etc. with only the
necessary speed.
- Plug all oil leakages. Leakage
of one drop of oil
per second amounts to
loss
of >2000 litres/year.
-
Incomplete combustion leads
to wastage of fuel.
Observe
the colour 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
can indicate
too many particles
in combustion.
Tips for electricity
conservation
in agriculture
-
Use efficient
equipment
and keep equipment
maintained.
-
Selection
of right capacity of pumps according
to the irrigation requirement.
-
Matching
of pump set with source of water
- canal or well.
-
Matching of motor
with
appropriate size pump.
-
Proper installation
of
the pump system
- shaft alignment, coupling
of motor
and pump.
-
Use of low friction
rigid
pipes and foot valves.
-
Avoid using
unnecessary
bends
and throttle
valves.
-
Use bends
in
place
of
elbows.
-
The
suction
depth
of 6
meters
is
recommended
for centrifugal
pumps.
The
delivery
line
should
be kept
at
minimum.
-
Check
pump
system
periodically
and
carry
out
corrective
measures
like
lubrication,
alignment,
tuning
of
engines
and
replacement
of
worn-out
parts.
-
Over
watering
can
harm
the
crops
and
allows
wastage
of
vital
water
resource.
Irrigate
according
to
established
norms
for
different
crop.
-
Use
drip
irrigation
for
specific
crops
like
vegetable,
fruits,
tobacco,
etc.
Drip
systems
can
conserve
up
to
80%
water
and
reduce
pumping
energy
requirement.
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