7 energy-efficiency improvements in lighting system _ eep
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Efficiency Improvements in Lighting SystemTRANSCRIPT
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7 Energy-Efficiency Improvement Opportunities In7 Energy-Efficiency Improvement Opportunities InLighting SystemLighting System
Lighting in industrial facilitiesLighting in industrial facilities
There are a lot of opportunities to optimise lighting system in (almost) any There are a lot of opportunities to optimise lighting system in (almost) any industrialindustrial
facilityfacility. Seven practical energy-efficiency opportunities to reduce energy use. Seven practical energy-efficiency opportunities to reduce energy use
cost-effectively are given below:cost-effectively are given below:
Lighting controlsLighting controls1.
Replace T-12 tubes by T-8 tubesReplace T-12 tubes by T-8 tubes2.
Replace mercury lights with metal halide or high pressure sodium lightsReplace mercury lights with metal halide or high pressure sodium lights3.
Replace metal halide (HID) with high-intensity fluorescent lightsReplace metal halide (HID) with high-intensity fluorescent lights4.
Replace magnetic ballasts with electronic ballastsReplace magnetic ballasts with electronic ballasts5.
Optimization of plant lighting (Lux optimization) in production andOptimization of plant lighting (Lux optimization) in production and
non-production departmentsnon-production departments
6.
Optimum use of natural sunlightOptimum use of natural sunlight7.
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1. Lighting controls1. Lighting controls
Lights can be shut off during non-working hours Lights can be shut off during non-working hours by automatic controlsby automatic controls, such as, such as
occupancy sensors which turn off lights when a space becomes unoccupied. Manualoccupancy sensors which turn off lights when a space becomes unoccupied. Manual
controls can also be used in addition to automatic controls to save additional energy incontrols can also be used in addition to automatic controls to save additional energy in
smaller areas.smaller areas.
The payback period for lighting control systems is The payback period for lighting control systems is generally less than 2 yearsgenerally less than 2 years..
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2. Replace T-12 tubes by T-8 tubes2. Replace T-12 tubes by T-8 tubes
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In industry, typically In industry, typically T-12 tubesT-12 tubes have been used. T-12 refers to the diameter in have been used. T-12 refers to the diameter in 1/8 inch1/8 inch
incrementsincrements (T-12 means 12/8 inch or 3.8 cm diameter tubes). The initial output for these (T-12 means 12/8 inch or 3.8 cm diameter tubes). The initial output for these
lights is high, lights is high, but energy consumption is also highbut energy consumption is also high..
They (T-12) also have They (T-12) also have extremely poor efficiencyextremely poor efficiency, lamp life, lumen, lamp life, lumen
depreciation, and color rendering index. Because of this, maintenance anddepreciation, and color rendering index. Because of this, maintenance and
energy costs are high.energy costs are high.
Replacing T-12 lamps with T-8 lamps Replacing T-12 lamps with T-8 lamps approximately doubles the efficacy of theapproximately doubles the efficacy of the
formerformer, thereby , thereby saves electricitysaves electricity..
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3. Replace mercury lights with Metal halide or High pressure sodium lights3. Replace mercury lights with Metal halide or High pressure sodium lights
Where color rendition is critical, metal halide lamps can replace mercury or fluorescentWhere color rendition is critical, metal halide lamps can replace mercury or fluorescent
lamps with an energy savings of 50%. Where lamps with an energy savings of 50%. Where color rendition is not criticalcolor rendition is not critical, high, high
pressure sodium lamps offer energy savings of 50 to 60% compared to mercury lamps.pressure sodium lamps offer energy savings of 50 to 60% compared to mercury lamps.
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4. Replace metal halide (HID) with High-intensity fluorescent lights4. Replace metal halide (HID) with High-intensity fluorescent lights
Traditional HID lighting can be replaced with Traditional HID lighting can be replaced with high-intensity fluorescent (HIF) lightinghigh-intensity fluorescent (HIF) lighting ..
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These new systemsThese new systems
incorporateincorporate
high-efficiencyhigh-efficiency
fluorescent lamps,fluorescent lamps,
electronic ballasts andelectronic ballasts and
high-efficacy fixtures thathigh-efficacy fixtures that
maximize output to themaximize output to the
work place.work place.
Advantages to the newAdvantages to the new
system are:system are:
They have lower energyThey have lower energy
consumption,consumption,1.
Lower lumen depreciationLower lumen depreciation
over the lifetime of theover the lifetime of the
lamp,lamp,
2.
Better Better dimming optionsdimming options,,3.
Faster start-up,Faster start-up,4.
Better color rendition,Better color rendition,5.
Higher pupil lumens ratings and less glare.Higher pupil lumens ratings and less glare.6.
High-intensity fluorescent systems yield High-intensity fluorescent systems yield 50% electricity savings50% electricity savings over standard over standard
HIDs. Dimming controls that are impractical in the HIDs can also saveHIDs. Dimming controls that are impractical in the HIDs can also save
significant amounts of energy. Retrofitted systems cost about significant amounts of energy. Retrofitted systems cost about $185 per fixture,$185 per fixture,
including installation costsincluding installation costs..
In addition to energy savings and better lighting qualities, high-intensity fluorescents In addition to energy savings and better lighting qualities, high-intensity fluorescents cancan
help to reduce maintenance costshelp to reduce maintenance costs..
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5. Replace magnetic ballasts with electronic ballasts5. Replace magnetic ballasts with electronic ballasts
A ballast is a mechanism that regulates A ballast is a mechanism that regulates the amount of electricity required to start athe amount of electricity required to start a
lighting fixturelighting fixture and maintain a steady output of light. and maintain a steady output of light.
Electronic ballasts save Electronic ballasts save 12 25% of electricity use12 25% of electricity use compared to magnetic compared to magnetic
ballast.ballast.
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Go back toGo back to
Optimisation List Optimisation List
6. Optimization of plant6. Optimization of plantlighting (Luxlighting (Luxoptimization)optimization)
In production andIn production and
non-production departmentsnon-production departments
In manyIn many
plants theplants the
lightinglighting
system issystem is
notnot
specificallyspecifically
designeddesigned
for thefor the
process.process.
There areThere are
luxlux
standardsstandards
for eachfor each
type oftype of
textiletextile
process.process.
For instance, the required lux for weaving is For instance, the required lux for weaving is usually higher than that ofusually higher than that of
wet-processingwet-processing. Even within just one production process, the required lux. Even within just one production process, the required lux
varies by the process step.varies by the process step.
For example, in a For example, in a cotton spinning processcotton spinning process, the required lux in the blow room should be, the required lux in the blow room should be
much lower than that of ring frame section. If the lighting provided is higher than themuch lower than that of ring frame section. If the lighting provided is higher than the
standard (required lux) for any part of the production, this results in a waste of electricity.standard (required lux) for any part of the production, this results in a waste of electricity.
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Therefore, the plant engineers should optimize the lighting system Therefore, the plant engineers should optimize the lighting system based on thebased on the
standard lux specific for each process stepstandard lux specific for each process step..
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7. Optimum use of natural sunlight7. Optimum use of natural sunlight
Many plants do not use Many plants do not use natural sunlight to an optimum levelnatural sunlight to an optimum level. In addition to optimizing. In addition to optimizing
the size of the windows, transparent sheets can be installed at the roof in order to allowthe size of the windows, transparent sheets can be installed at the roof in order to allow
more sunlight to penetrate into the production area.more sunlight to penetrate into the production area.
This can reduce the need for lighting during the day.This can reduce the need for lighting during the day.
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Reference //Reference // Industrial Energy Audit Guidebook: Guidelines for Conducting an Energy Industrial Energy Audit Guidebook: Guidelines for Conducting an Energy
Audit in Industrial Facilities Ali Hasanbeigi, Lynn PriceAudit in Industrial Facilities Ali Hasanbeigi, Lynn Price
Recommended EE articles //Recommended EE articles //
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About Author //About Author //
Edvard CsanyiEdvard Csanyi
EdvardEdvard - - Electrical engineer, programmer and founder of Electrical engineer, programmer and founder of EEPEEP..
Highly specialized for design of LV high power busbar trunkingHighly specialized for design of LV high power busbar trunking
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