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TIPS
ON ELECTRICAL ENERGY
PUMPS:
o Reducing the speed of a centrifugal
pump by half would reduce the poser consumption
by 8 times.
o A reduction in 10% impeller diameter
would reduce power consumption by 40%
ELECTRIC
MOTORS:
o For every 10°C increase in motor
operating temperature over a recommended
peak, the motor life is estimated to be
halved.
o If rewinding is not done properly, the
efficiency can be reduced by 5-8%.
o Variable speed drive option can result
in input energy consumption reduction
by 5-15%. In some pump/fan applications,
saved energy could be as high as 35%.
LIGHTING:
o Ensure proper illumination and efficacy
(lumens/watt).
o Install photocells.
o Use timers.
o Retrofit occupancy sensor.
o Use servo-stabilizer in the lighting
circuit.
o Replace High Pressure Mercury- Vapor
lamps with High Pressure Sodium-Vapor
lamps.
o Replace conventional chokes with electronic
chokes.
COMPRESSED
AIR:
o Every 5°C reduction in intake temperature
would result in 1% reduction in compressor
power consumption.
o Compressed air leak from a 1 mm hole
size at 7 kg/cm2 pressure would mean a
power loss equivalent to 4500KWH per year.
o A reduction of 1 kg/cm2 of air pressure
(for instance from 8 kg/cm2 to 7 kg/cm2)
would result in a 9% input power savings.
REFRIGERATION:
o Refrigeration capacity is reduced by
6% for every 3.5°C increase in condensing
temperature.
o Reducing the condensing temperature
by 5.5°C, results in a 20-25% decrease
in compressed power consumption.
o A reduction of 5.5°C in cooling
water temperature at the condenser outlet,
reduces compressor power consumption by
3%.
o A 1 mm. scale build-up on the condenser
tubes can increase energy consumption
by 40%.
LIGHTING:
o Ensure proper illumination and efficacy
(lumens/watt).
o Install photocells.
o Use timers.
o Retrofit occupancy sensor.
o Use servo-stabilizer in the lighting
circuit.
o Replace High Pressure Mercury- Vapor
lamps with High Pressure Sodium-Vapor
lamps.
o Replace conventional chokes with electronic
chokes.
ENERCON
ON AIR COMPRESSORS:
One foundry tried to gather data for its
energy conservation (ENERCON) experiment.
The operation of a 5-HP air compressor
supplying compressed air to an F-2 jolt-squeezer
was isolated and the following data were
gathered:
Mold
making at usual pace,
air pressure needed = 65 psi max. to 45
psi min.
Cycle time of air compressor,
Set at 65 psi max.:
Compressing, cut-in = 55 seconds
Idling, cut-off = 10-12 minutes
This
translates to the air compressor operating
only about 9.17 to 7.64% of the time (an
average of 8.4%).
Previous
to this it was observed that the system
of three parallel compressors operating
simultaneously supplying air to the battery
of molding machines, set at 100 psi.,
did not have any idling time. It was found
that two compressors operating in parallel
and set at 65 psi. did a much better job,
providing idling time for the system,
thus conserving some energy in the guise
of electric power.
JETRO
EXPERTS HERE
Jetro Expert Service Abroad for Improving
Business Environments (JEXSA) under
the Green Aid Plan (GAP) Energy Conservation
Program of the Metalcasting Industry are
here to help us assess and improve our
energy conservation measures.
They are:
Experts: Mr. Tanaka and Mr. Shobuzawa
Period: February 12-16; 19-23, 2007
Concept: Phase 2 (Make up Target rate
and Skill up Measure)
How to: Consultation, Seminar and Panel
Discussion
The
Seminar and Panel Discussion will be held
at Dusit Hotel Nikko in Makati City, is
scheduled for February 23, 2007, and will
cover the following:
* Procedure for Auditing Enercon Measures
* Enercon Measures in Japanese Foundries
* Philippine Government Policy on Energy
Conservation
* Current Situation in Philippine Foundries
* Presentation of Visited Companies
* Panel Discussion on Future Plans for
Promoting Energy Conservation.
The
Japanese Experts are scheduled to leave
for Japan on February 24, 2007
Other
Related Topis:
>
STATE
OF POLLUTION CONTROL IN FOUNDRIES
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