Energy Efficient Lighting Scheme OfBuildings Using Computer Tools

NOVATEUR PUBLICATIONS
INTERNATIONAL JOURNAL OF INNOVATIONS IN ENGINEERING RESEARCH AND TECHNOLOGY
[IJIERT]
ISSN: 2394-3696
VOLUME 2, ISSUE 4, APR.-2015
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Energy Efficient Lighting Scheme OfBuildings Using Computer
Tools
S.H.Shete
Mithari Rahul Bhivaji
PharneShridharLalaso
Gaikwad Vikrant Sateri
Sakpal Vishal Vijay.
Department of Electrical Engineering,
Ashokrao Mane Group of Institutions,
WathartarfVadgaon, 416112 Kolhapur, India
ABSTRACT
In many of places or buildings uses only artificial lighting scheme. The daylight is
reduces the cost of energy consumption with lighting load. In case of cloudy condition
there is less availability of daylight. Thus for proper visualization of objects, manage
lighting scheme with artificial as well as daylight harvesting. Using RELUX software
design building with proper combination of artificial and daylight schemes with help of
sensor element for automatic ON-OFF control.The another tool like DIALUX software
reduces the unwanted shadow and glare effect in building. Thus paper aim is design
building with proper and efficient lighting scheme with control action of sensor on
combination of artificial and daylight with saving of electrical energy cost.
KEYWORDS :building, daylight harvesting , efficient lighting , sensor.
INTRODUCTION
The demand of electricity is more than its production in day today life.The demand of
lighting load is increased for housing, domestic purposes, commercial offices and
playgrounds. In many of places or buildings uses artificial lighting scheme. When
artificial light is used the lighting energy contribution is more compared to daylight
scheme.
Thus the artificial and daylight harvesting methods with energy efficient luminaries is
dominant in today life. Not only efficient lighting but also proper lighting control gives
properly authorized building. As daylight produce less heat per unit illumination than
many artificial lighting systems thus day lighting may reduce the cooling requirement
when it replace artificial lighting.[1-2]The daylight is reduces the cost of energy
consumption with lighting load. In case of cloudy condition there is less availability of
daylight. Thus for proper visualization of objects, manage lighting scheme with
artificial and daylight harvesting.
This paper approach towards the proper combination of daylight and artificial lighting
scheme for saving of energy cost .Using RELUX software design building with proper
combination of artificial and daylight schemes with help of sensor element for
automatic ON-OFF. The tool like DAILUX software reduces the unwanted shadow and
glare effect in building.

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Thus paper aim is to design building with proper and efficient lighting scheme with
control action of sensor on combination of artificial and daylight lighting load with
saving of electrical energy cost.
CASE STUDY
The college building chosen for case study is situated in Vathar near Pune-Banglore
highway in Kolhapur district. This college building has 3 floors with classrooms,
Laboratories, office and library. The building is RCC framed structured. As per existing
design there uses luminaries TL-D 36W and only uses artificial lighting during college
hours from (10.00AM -5.00 PM)
So as an electrical engineer we planned to use daylight harvesting scheme for
illuminating total college building. Thus author felt that by taking up this case study and
with help of RELUX software they could give advantages of daylight harvesting. Also
author felt that the unwanted glare and shadow could remove with DIALUX software.
Thus the solution is made by the authors could help in convincing the college authority
for changing the existing plan for illumination and go towards the reducing cost of
lighting load as fulfillment made by author.
The external front view of first floor of college building shown in figure 1
Figure 1.External front view of first floor of college building.
CONVENTIONAL METHOD
A) Artificial illumination
In this section the RELUX software analysis of artificial lighting control for fluorescent
luminaries. Consider building with artificial illumination with no use of daylight
harvesting. The proper illuminance is considered as per Indian standards[3]
B) Existing illumination action
The existing lighting scheme is provided classrooms and labs with 36 watt fluorescent
tubes. The scheme is designed for a services illuminate as per Indian standard IS-3646;
1992[3] considering maintenance factor of 1 using RELUX software. The design using

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RELUX software of a seminar hall in college building with existing lighting level
shown in figure 2
Figure 2. Seminar hall design with existing lighting level
The current trend is to use the artificial illumination through the college hours. The
Kolhapur city has much more availability of daylight during college hours. The design
shown of artificial or daylight harvesting acting alone shown in figure 3and 4
Figure 3.Seminar hall -Artificial result.
Figure 4.Seminar hall - Daylight result.

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PROPOSED METHOD
A) Daylight illumination
If the daylight harvesting is done we can save around70% energy cost. The college
building having no availability of desired amount of daylight due to building design
with its orientation and classroom dimensions. Thus there is requirement of artificial
light to fulfill the need of proper illumination.
One of seminar hall was simulated using RELUX software to check performance of
daylight effect. The simulation and hardware had done for 28 days in October 2014
under given sky situations. In time of 10 AM to 12 PM and 3.30 PM to 5 PM there was
less availability daylight. The simulated design of seminar hall shown in figure 5
Figure 5. The effective illumination level of seminar hall with artificial and
daylight scheme
Thus to maintain 300 lux as per Indian standard [3] there was requirement of artificial
light.
B) Effective proposed method
To fulfill the remaining need of lighting while using artificial method or daylight
method acting alone there is best solution to use energy efficient lighting scheme. The
quantity of light reaching certain surface is usually the main consideration while
designing a lighting system with proper combination of artificial method as well as
daylight method. In this proposed method uses effective daylight during clear sky. The
ratio between the solar heat gain coefficient and visual transmittance is called light- to –
solar gain ratio [4].When over sky condition occur then lighting load recovered by using
artificial method. The existing fluorescent luminaries can be replaced by proposed
LEDs.
The no of luminaries given by Lumen method that should be installed for given area.
The number of lamps is given by the formula
N=E*A/ F*UF*MF
N= No. of lamps required
E= Illuminance level required (lux)
A= Area at working plane height (m^2)
F= Average luminous flux from each lamp (lm)
UF= Utilization factor, an allowance for the light distribution of the luminaire and the
room surface.

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MF= Maintenance factor, an allowance for reduced light output because of deterioration
and dirt.
For example-
Area of seminar hall of college building measures 201.5 sq. m
Illumination required for seminar hall is 300 lux
Utilization factor = 0.70[5]
Lamp maintenance factor = 1[4]
N =(300lux *201.5)/(2800*0.70*1)
N =30.84
N=31 lamps
Glare And Shadow Removal (Using DILUX Software)
The light cost will be reduced by energy efficient lighting scheme with using software
tool. Using DIALUX software minimizes the unwanted glare and shadow of windows,
walls and chairs present inside room.The designing of building is same as in RELUX
software but only glare and shadow removal of artificial light takes place. Also
luminaries are set using various angle for proper light and glare removal purpose.
The conventional lighting deals with halogen lamps, mercury vapour lamps and metal
halide used in the substation for carrying maintenance at night [5]. But now day uses
metal halide for more light effects.The software have more selections like selection of
no of luminaries, types,height,angles and lux requirement for efficient scheme.
Using DILUX software maximum 70% of glare effect should be minimized.Take case
study of seminar Hall of AMGOI College building with removal of 70% glare shown in
figure 6.
Figure 6.Seminar Hall with removal of 70% glare and shadow.
Daylight harvesting
Daylight harvesting systems which automatically adjust lights in response to the amount
of daylight in a space can provide significant energy and demand of saving. The
buildings has automated controls on light in presence of daylight called daylight

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harvesting. The daylight harvesting method improves control action when requirement
of lighting source.
This daylight harvesting system provides sensors to set light ON/OFF. When efficient
light is available in room the automatic dimming sensors are used to dimming the
luminaries. Most of sensors operates and switch OFF luminaries when room is not in
use. These sensors create system more reliable and user friendly. The cost of daylight
harvesting system should be low because it uses small components and create automatic
control action. So this system is cost efficient.Result using automatic ON/OFF sensor
shown in figure 7.
Figure 7. Result using automatic ON/OFF sensor
A) Daylight dimming sensors-
Occupancy sensors are more sensitive they can detect fine movement and small in size.
This occupancy sensor most effective to save energy also daylight dimming sensors [6]
is effective for individual’s luminaries. These sensors have high demand for simpler
ON/OFF application as soon as certain amount of daylight is present and artificial light
is reduced. When efficient light available in room then this dimming sensorsoperates
and dimming of light takes place. Using sensors saving of 80% light take place.
Automatic dimming sensor shown in figure 8
Figure 8. Automatic dimming sensor

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CONCLUSION
Energy efficient lighting simulation proves beneficial for given building. Using
DIALUX software tool removal of unwanted shadow and glare effect of walls and
chairs takes place. The direct effect of efficient lighting on reducing of total cost. This
paper aim is to focus on lighting simulation tools for advanced efficient lighting
methods. The day lighting will provide cost reduction if properly controlled.
The RELUX software used to design proper integration of day light and artificial
lighting scheme. The sensors are mounted in room for adjustment of light. The sensors
are provided which are automatically ON/OFF when no use of light. Thus sensor are
reduces the total cost and gives proper illumination using software tools.
In short
• Using RELUX software we uses both artificial and daylight methods for efficient
lighting schemes.
• DIALUX software uses effectively for removal of glare and shadow effect.
• The sensors are provideautomatic ON/OFF operation and automatic dimming of
light which saving of energy in terms of cost.
REFERENCES
[1] KurianCP ,Aithal RS Bhat J, George VI. Robust control and optimization of energy
consumption in daylight-artificial light integrated schemes. Light Res Technol
2008;40(1):7-24.
[2] Loutzenhiser PG Maxwell GM, Manz H. An empirical validation of the
daylightingalorithms and associated interaction in building simulation programs using
various shading devices and windows. Energy- Int J 2007;32(10):I855-70.
[3] Bureau of Energy Efficiency
[4] Luminarie selection – Philips concern photometric Database 09-09-2014
[5] Doulos L, Tsangrassoulis A, Topalis F. Quantifying energy savings in daylight
responsive systems: the role of Dimming electronic, Energy build 2008;40(1):36-50
[6] Application of RELUX software in simulation and analysis of energy efficient
lighting scheme by shailesh K R and Tanuja S Raikar MIT, manipal university-S76104,
India.

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