ENERGY CONSERVATION STRATEGIES FOR LIGHTING SYSTEMS IN BSNL TELECOM BUILDINGS

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ENERGY CONSERVATION STRATEGIES FOR LIGHTING
SYSTEMS IN BSNL TELECOM BUILDINGS

• VP GUPTA
• CERTIFIED ENERGY AUDITOR
• Principal Chief Engineer (Electrical)BSNL

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INTRODUCTION

• Energy Conservation A Key Strategic Business
  Goal Way of Life in BSNL
• Energy Saved -
• Results in Less Carbon Emission,Global warming
  Climate Change
• Can be used to meet the demands of Priority
  Sectors
• Reduces Operating Costs
• Pure Profit to BSNL

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INTRODUCTION-Contd

• Telecom Business is very competitive, Energy
  Saving through innovative strategies Helps to
  remain competitive
• Energy Conservation is thus critical for
  sustainability of growth and efficiency

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GREEN PLANET

• TECHNOLOGY HAS MADE THIS WORLD A GLOBAL
  VILLAGE AND IT IS FOR US TO MAKE THIS VILLAGE A
  BEAUTIFUL AND GREENER PLACE TO LIVE
• H.H. SRI SRI RAVISHANKAR

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WHAT IS BSNL REQUIREMENT

• Quality
• Ingenuity
• Glare Free Illumination
• Energy Efficient Lighting Systems
• Enhanced Aesthetics
• Space Maneuverability

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WHY ENERGY CONSERVATION STRATEGIES FOR LIGHTING
IN BSNL TN CIRCLE

• Lighting Load Approximately 20
• Highest Saving Potential
• Verification of Savings Easy
• Implementation very easy
• You can make the difference
• Saving in Lighting Load means energy saving due
  to lighting and also energy saving due to less
  Airconditioning load

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Innovative Strategies Overview

• Electricity Bill for BSNL TN Circle for 2006-07
  - Rs.1078 Millions
• Rs200 Millions due to Lighting alone
• BSNL Tamil Nadu Circle has 2020 Telephone
  Exchanges/ Buildings, and
• 2100 Base Tran server Stations BTS
• Buildings divided into seven Category
• Innovative Strategies specific to these seven
  categories employed

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Innovative Strategies Overview

• Encon Measures broadly classified as No Cost, Low
  Cost and High Cost Measures
• Standards and Base Line Energy Consumption
  Patterns for each Category defined, and
• Illumination Energy Audits / Surveys conducted on
  these buildings accordingly

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NO COST MEASURES

• Review of Lux Level
• Removal of excess lamps/tubes
• Building Orientation/Architectural Features, use
  of Natural Day Light
• Awareness Campaigns, Change in Human Behaviour
  and Attitude

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LOW COST MEASURES

• Retrofitting with Energy Efficient Lighting
  Sources and Fixtures
• Providing Electronic Chokes
• Separating Light Switches from Group Control to
  Individual Control
• Switching OFF lights through Sensors / Timers

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LOW COST MEASURES-Contd

• Power Factor Improvement
• LED indications in Panels and in all Sign boards
• Use of Dimmer / Dali System
• Replacement of Discoloured Reflectors, Shades and
  ensuring their timely cleanliness

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HIGH COST MEASURES

• Automation and Building Management System
• Energy Auditing as per Bureau of Energy
  Efficiency (BEE) guidelines for buildings having
  connected load of more than 500 KW

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CATEGORY OF BUILDINGS

• Cat I
• Cat II
• Cat III
• Cat IV
• Cat V
• Cat VI
• Cat VII

• Telephone Connections above 4 K
• Telephone Connections between
• 1.4 K to 4 K
• Telephone Connections between
• .5 K to 1.4 K
• Telephone Connections less than .5K
• Admn / Commercial buildings
• Training Centres
• Base Transerver Stations (BTS)

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ILLUMINATION ENERGY AUDITS/SURVEYS

• In BSNL Tamil Nadu Circle, Energy Audits/
  Surveys completed in 1268 Exchanges/ Bldgs

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ENERGY CONSERVATION MEASURES AT DESIGN STAGE

• Lighting in all new buildings including Category
  VII Bldgs and BTS Stations provided as per Energy
  Conservation Building Code with light power
  density less than 11.8 W/MSq
• Cat I, II III Buildings are designed for
  general lighting 100 LUX and task lighting 150
  LUX with T5, 28 Watt T8, 36 Watt Lamps

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ENERGY CONSERVATION MEASURES AT DESIGN STAGE

• General Lighting Control provided near Switch
  Room and normally kept OFF.
• Task Lighting circuit divided in two parts to
  switch OFF and ON 50 of lighting in each bay
  with separate controls for every bay

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ENERGY CONSERVATION MEASURES AT DESIGN STAGE

• Category V VI buildings are designed for
  300-400 LUX with T5, 28 Watt and T8 , 36 Watt
  Lamps.
• Basic 1 x 11 Watt CFL Lamp Luminaries has been
  standardised for Cat IV Cat VII Buildings

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REPLACEMENT WITH ENNERGY EFFICIENT SOURCES

• Compound Lighting light sources efficiency more
  than 60 Lumens/Watt
• Common Areas like entrance, lobbies, corridors,
  staircase, toilets, etc, mainly with CFL
• Corridor 36 Watts fittings with Copper Chokes
  being replaced with 1 X 11 Watts CFL fittings

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COMMON AREA LIGHTING -CASE STUDY RS 76000 ANNUAL
SAVINGS IN ADMN BLDG, CHENNAI Estimated Savings
Rs.7,500,000/For all TN Bldgs
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NO COST MEASURES REVIEW OF LUX LEVELS

• LUX level of Switch Room Lighting continuously
  reviewed in Energy Surveys
• Excess Lamps Fittings removed to bring LUX
  levels to 100 LUX for General Lighting and 150
  LUX for Task Lighting
• Incandescent Lamps completely banned and are
  replaced with CFL Lamps even for small rented
  buildings

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NO COST MEASURES USE OF NATURAL LIGHT

• New Buildings are planned to have following
  built-in features-
• Optimum use of day light
• Artificial Light switched off manually for Cat
  II, III, IV VII Buildings and by providing
  Sensors in Cat I, V VI Buildings
• Interior walls painted with light colours to get
  maximum reflection
• Orientation of buildings so as to get maximum
  natural sun light

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NO COST MEASURES AWARENESS CAMPAIGNS

• Awareness Campaigns, Presentations on Energy
  Conservation regularly conducted to spread the
  message.
• Energy Conservation Awards for Field Engineers to
  recognize and acknowledge the best performing
  engineers
• Energy Conservation Week Celebrated
• The above measures resulted in change in human
  behaviour and brought out positive attitude in
  the Employees

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LOW COST MEASURES RETROFITTING WITH ENERGY
EFFICIENT LIGHTING SOURSES

• In Cat I, II, V VI Bldgs, existing T 12 (40 W)
  fittings replaced with T5 (28W) fittings and CFL
  Lamps
• In Cat III Bldgs T8 (36 W with Electronic Choke)
  and CFL Lamps are provided
• In Cat IV and Cat VII Bldgs, basic 1 x 11 W CFL
  Lamps provided

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RETROFITTING WITH T5 -CASE STUDY RS 75000
ANNUAL SAVINGS IN RGM TTC, CHENNAI Estimated
Savings Rs.11,500,000/For all TN Bldgs
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LOW COST MEASURES PROVIDING ELECTRONIC CHOKES

• Purchase of Copper Chokes banned
• Burnt out chokes replaced with Electronic Chokes
• In Major Buildings (Cat I, II, V VI) copper
  chokes being replaced with Electronic Chokes or
  complete fixtures to be replaced with T5 (28 W)
  Tube and Fixtures

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LOW COST MEASURES Contd

• Group Control Light Circuits rewired to enable
  minimum lights switched on actual need basis
• Occupancy Sensors provided in Senior Executive
  Chambers
• Timers and Nature Switch provided for Compound
  and Common area lighting
• Discoloured reflectors, shades replaced and staff
  are motivated for timely cleanliness of
  Luminaries.

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LOW COST MEASURES Contd

• By Monitoring of Energy Bills, power factor
  improved to 0.98 with additional capacitors
• Conventional indicating lamps in panels/sign
  boards replaced with LED lamps

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LOW COST MEASURES USE OF DIMMER/DALI SYSTEMS

• Dimmer/Dali Systems In the Conference Hall
  Hall of Inspiration at Chennai, Dali
  Controllers provided to offer variety of Scene
  Settings
• Dali system along with suitable luminaries
  Dimmable Chokes offers programmable lighting
  system from 0 to 100.
• Savings up to 30 and thus very cost effective.

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HIGH COST MEASURES AUTOMATION BUILDING
MANAGEMENT SYSTEM

• For the Admn Bldg coming at Greams Road, Chennai
  following features are planned -
• Centralised Monitoring and Controlling of
  Lighting System
• Use of Occupancy Sensors, Photo Sensors, Timers,
  Dali and Dimmable Blast
• Lighting System integrated with Building
  Management System for programmed switching
  ON/OFF lights in various areas/zones based on
  occupancy, day light, time of day and Holiday
  Schedules

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HIGH COST MEASURES ENERGY AUDITING AS PER BEE
GUIDELINES

• For the 10 Major Buildings with connected load of
  more than 500 KW
• Energy Auditing as per BEE Guidelines
• Lighting installations upgraded to meet Energy
  Conservation Building Code
• High Cost Measures are selectively implemented in
  category I, V VI buildings.

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BARRIERS IN IMPLEMENTATION OF ENERGY CONSERVATION
STRATEGIES

• Awareness Level very low
• Energy Efficient fittings perceived to be
  expensive as the initial cost is high
• Lack of proper guarantee (burning hours)
• Wide Range of choices of lamps, though helps in
  innovative designs, causes barriers in
  standardisation
• Energy Labeling (Star Rating) will go a long way
  in changing the perception and creating awareness
  on Energy Efficient Lighting.

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CONCLUSION

• Quality Life of Energy Efficient Lamps (T5) and
  Electronic Chokes are not as per parameters
  claimed by manufacturers
• Energy Labeling (Star Rating) of BEE will go a
  long way in improving the quality and life of
  these energy efficient lamps and chokes
• Continuous monitoring, Energy Surveys and
  Re-auditing is necessary to retain the cost
  effectiveness of these Energy Conservation
  Strategies

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CONCLUSION - Contd

• BSNL as on 31.11.07 has
• 37936 Buildings and more than 45,000 Base
  Transceiver Stations (BTS)
• 67,776,096 Telephone Connections (25.6 market
  share)
• 35,491,814 Basic (82.17 market share)
• 32,284,282 Mobile Telephones (14.57 market
  share)

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CONCLUSION - Contd

• Annual Electricity Bill of BSNL is more than
  Rs.14,000 Millions
• Thus there exists a tremendous scope of reduction
  in Energy Bills
• Energy Conservation has become a new Mantra
  (Focus Area) in BSNL to save Energy and to make
  this world a Beautiful and Greener Place to Live.

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Thank You