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Energy ManagementEnergy ManagementInIn

Software IndustrySoftware Industry

(TIL Case Study)(TIL Case Study)

By:By:-- Rahul WalawalkarRahul Walawalkar

Energy Consumption inEnergy Consumption inSoftware IndustrySoftware Industry

Computers : ( < 20 % )

Mainframes

Personal Computers

Printers

Illumination ( < 25 % )

Air Conditioning ( > 50 % )

Other ( < 5 % )Computers Lighting Air-conditioning Other

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Components ofComponents of

Energy Efficient LightingEnergy Efficient Lighting

Fittings

Anti-glare

Category 1

Lamps

High efficacy

Good C.R.I.

Luminaires Ballasts

Illumination level

Glare

Dynamic Imbalance

Controls

Sensors

Multiple level Switching

Colour Scheme

Use of daylight

Design Maintenance

Illumination System

IlluminationIllumination

Factors required to be considered while

designing the lighting scheme :-

1) Illumination level

2) Uniformity of Illumination

3) Colour of Light

4) Mounting height

5) Spacing of luminaries

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Other factorsOther factors -- 11

Uniformity of Illumination :Uniformity of Illumination :--

Visual performance is best if the range of brightness is not greater

than 3 : 1. Modern trend is towards localised lighting plus

general lighting and towards adaptation of general lighting

oriented towards the working plane.

Colour of Light :Colour of Light :--

The appearance of body colour entirely depends upon the colour of

the incident light. Daylight fluorescent tubes give good colour

rendering at sufficiently high level.

Mounting height :Mounting height :--Generally there should be a minimum clearance of

2.5 meters between luminaries

and the floor.

Spacing of luminaries :Spacing of luminaries :--

With fluorescent luminaries it is a good practice tohave the ratio of horizontal spacing between rows to

height of the luminaries above the working plane in

the range of 1 to 0.75.

Other factorsOther factors -- 22

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Illumination levelIllumination level

Degree of illumination necessary, depends upon :Degree of illumination necessary, depends upon :--

a) The size of object and its distance from observera) The size of object and its distance from observer

b) Contrast between the colour of the object and backgroundb) Contrast between the colour of the object and background.

Recommended values of Illumination Levels ( As per ISRecommended values of Illumination Levels ( As per IS -- 3646 I : 1992 ) :3646 I : 1992 ) :--

-----------------------------------------------------------------------------------------------

Sr. No. Location IlSr. No. Location Illumination Level (in Lux)lumination Level (in Lux)

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

11 Computer work areaComputer work area 300300 -- 500500 -- 750750

22 Entrance and HallwaysEntrance and Hallways 150150 -- 200200 -- 300300

3 Reception3 Reception 200200 -- 300300 -- 500500

4 Classroom4 Classroom 200200 -- 300300 -- 500500

5 Stairs5 Stairs 5050 -- 100100 -- 150150

6 Library (reading area / tables)6 Library (reading area / tables) 200200 -- 300300 -- 500500

7 Library (book shelves)7 Library (book shelves) 100100 -- 150150 -- 200200

-------------------------------------------------------------------------------------------------

Various methods can be used for lighting designlike lumen method, point by point method. Out ofthese methods, lumen method is one of the most

commonly used.

Steps involved in illumination design by the lumenSteps involved in illumination design by the lumen

method :method :--

1) Study the plan and requirements of the work

environment.2) Calculate the Room Index (RI).

3) Determine the U F and Maintenance Factor .

4) Calculate the number of luminaries required.

5) Determine the number and type fittings.

Lighting Design CalculationsLighting Design Calculations

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ControlsControls

A/CA/C

LightingLighting

Lumen ControlLumen Control

Timer ControlTimer Control

AutomaticAutomatic

ManualManual Automation

System

Automation

System

Temperature &

Humidity Control

Temperature &

Humidity ControlAutomaticAutomatic

Various Control Strategies

Office with the modernOffice with the moderncontrolscontrols

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Occupancy patternOccupancy pattern

28th September 1998, Monday

0

100

200

300

400

500

600

700

800

07-08

09-10

11-12

13-14

15-16

17-18

19-20

21-22

Time

Occupancy

Energy use & savingsEnergy use & savingsby use of Modern Controlsby use of Modern Controls

Savings from

Occupancy Sensor

Savings from Dimming

Savings due to manual

Control

Energy Use

Energy Wasted due to

Time Delay

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ResultsResults

520000

81000

216000

70000

230000

266000

40000

00

100000

200000

300000

400000

500000

600000

SEEPZ Bangalore Pune

Lighting

AC

Investment

Success Plan forSuccess Plan forEnergy Management ProjectEnergy Management Project

EnergyManagement

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Use the right amount of lightUse the right amount of light..

At the right placeAt the right place..

The right timeThe right time..

AndAnd

Efficiently !!!Efficiently !!!

ConclusionConclusion