This is second part of the presentation on Energy conservation efforts made in secretariat building in Gandhinagar. Presentation was made on Energy Conservation Day at Gujarat State Center, The Institution of Engineers (India) at Ahmedabad.

1. Energy Conservation in
Sachivalaya Complex
Gandhinagar Part 2
By Er Uresh Mehta
Past Chairman, GSC & Chief Engineer(Electrical)
(retd)
Roads & Building Department

2. Application of SRGB Fittings by
replacing 1Kw Helogen fittings
in Assembly Hall. (48 nos.)

3. Advantages for
Replacement of Helogen
Fittings by SRGB Fittings
• The consumptions reduced by approx.
67%
• Air-Conditioning efficiency increased
• Illumination level increased to from 350
to 550.
• Better illumination for Video Graphy.
• The life of the lamp is 6000 to 8000

4. Replacement of Street Light
Fittings in the campus

5. Advantages of Metal Helide
Fittings
• The consumptions reduced by approx.
40%
• Less Maintenance Problems
• Better White Illumination

6. Replacement of Conventional Cooling
Tower By FRP Cooling Tower (1500 TR)

7. Advantages of FRP Cooling
Towers
• The consumption reduced by 210 HP
From 350 HP to 140 HP
• The Consumption of water is reduced
• Less Maintenance Problems.

8. Energy Saving by
Staggering the timings of
the Lifts
• Office Hours :- 10.30 to 6.10
• Rush Hours :- 10.00 to 11.00
(Facility available 14.00 to 15.00
for 2 Lifts) 17.30 to 18.30
• Facility available :- 11.00 to 14.00
for 1 Lift 15.00 to 17.30

9. Staggering the timing of
A.C. Plants
• Office Hours :- 10.30 to 18.10
• Plant Running Timing :- 8.30 to 20.30
(or last occupancy in the office)
• At present 9.30 to 6.15

10. Replacement of A.C.
Replaced old window type air condition
machines by new 130 Nos.
Advantage
Savings in Energy
Reduction in M & R Cost
Increase the efficiency

11. Monitoring of Transformer
Load
At the winter time load is decreased due to
the shut down of A.C. Plant. So it is
decided to stop 3 Nos. of 1000 KVA
Transformers for atliest 3 months to
reduce no load consumption of
Transformers

12. Increase in Load during the
Project
• 5500 Nos. of Computers in different Govt.
Departments. - 500 Kw
• Renovatation of Different Offices in the Govt.
Department - 100 Kw
• Increase in the Nos. of Window / Split A.C.
Machine - 150 KW
• Installation of Fountain in The Campus - 50
Kw
Total Increase in Load - 800 Kw

13. Energy Consumption in Electric
Bill (H.T.)
• Year Units Amount (in
Rs.)
(Jul to June)
2001-2002 7868550 35878269-
2002-2003 6743670 32993240-
2003-2004 6990804 33375111-
2004-2005 5993970 31563274
2005-2006 7051260 30518972
2006-2007 7505070 32193587
2007-2008 7460670 32930164

14. Saving compared to Year 2001-2002
(July’2001 to June 2002) [Base Line Bill ]
• July to June
• Year Units Amount (In
Rs.)
2002-2003 1124880 2885030/-
2003-2004 877710 2503159/-
2004-2005 1874580 4314995/-
2005-2006 817290 5359297/-
2006-2007 363480
3684682/- 2007-2008

15. Savings in Maximum Demand fix charges
• Probable increase in maximum demand – 800 KW
• Probable increase in fix charges –Rs 1,00,000/- P.M
Approx.
• For Six Years Total probable Saving – Rs. 72.00
Lacs
Additional Savings of Rs. 72.00 lacs is
achieved without increasing maximum
demand.

16. Total Savings From
July’2002 to June’2008
Units 54,65,820
Rs. 2,16,95,260/- +
72,00,000/-
= Rs. 2,88,95,260.00/-

17. Energy Saving Project Cost
• Replacement of 7500 Tube Lights =
NIL
(As the amount is paid in the Electricity
Bill by Installments and it is included in
the above billing.)
• Replacement of 10000 tube Lights =
70.00 lacs
• Replacement of FRP Cooling Tower =
22.00 Lacs
• Replacement of Street Lights Fittings =
5.00 Lacs
• Replacement of Helogen Fittings = 25.00
Lacs
• Replacement of A.C. machine =

18. Future Project for Sachivalaya
Complex
• Replacement of chillers of A.C. Plant
• Replacement of very old Window A.C.
Machines
• Replacement of conventional coil type
regulators by Electronics Regulators
• Staggering the running timing of water
supply pumps.
• Replacement of ceiling fans

19. “Energy Saving in
Street Light
at
Gandhinagar
Township”

20. Existing Installations
• 250 / 400 Watts Mercury / Sodium Fittings
2403 Nos
• 150 / 125 Watts Mercury / Sodium Fittings
1306 Nos.
• 70 Watt Mercury / Sodium Fittings
1729 Nos.
• 11 Watt C.F.L. Fittings
537 Nos.
• 100 Watt I.N.C. Lamp
9240 Nos
• Total Switching Points
134 Nos.

21. Energy saving project by
Replacement of 100 Watt INC
Lamp by 14 watt T/5 Street Light
Fittings
Gradually step-by-step the total
replacement done at 7500 Nos

22. Tentative Savings
Energy Consumptions
for 100 watt inc lamp
Energy Consumptions
for 14 watt T/5 tube
100 w x 10 Hr. x Rs
3.25 x 365 days x 7500
Nos = Rs. 8896875/-
14 w x 10 Hr. x Rs 3.25
x 365 days x 7500 Nos
= Rs. 1245563/-
100 w x 10 Hr. x 365
days x 7500 Nos =
2737500 Units
14 w x 10 Hr. x 365
days x 7500 Nos =
383250 Units
Savings in Units = 2354250
Saving in Rs. 7651312

23. Advantages of the Project
• Energy Savings as Follows :-
Energy Consumptions per year for 100 Watt I.N.C. Lamp = 100
x 10 Hrs. x Rs. 3.25 X 30 x 12 / 1000 = Rs. 1170/-
• Energy Consumptions per year for 14 Watt T/5 Fittings
= 15 W x 10 Hrs. x Rs. 3.25 X 30 x 12 / 1000 = Rs. 176/
• Say Rs. 180/-
• Thus theoretically Savings achieved during the year for 3422
Poles = (1170 – 180) * 3422 Poles = 3387780/-
• The Project is taken upon hand step-by-step so actual savings
achieved from July’2004 to Dec’2005 = Rs. 24,47,660/- and the
project of replacement is completed now for 7500 fittings.

24. Details of Electrical Bills in Street
Light (Last Five Years)
Year
(April to
March)
Unit Amount (In
Rs.)
2003-2004 6720334 21169051.00
2004-2005 6724931 20225932.00
2005-2006 5710916 17989384.00
2006-2007 5010627 14783475.00
2007-2008 4650563 14649275.00

25. Energy Saving in Last Four Years
Considering 2003-2004 as a Base
Line
Year
(April to
March)
Unit Amount (In
Rs.)
2004-2005 299403 943119.00
2005-2006 1009418 3179667.00
2006-2007 1709707 5385576.00
2007-2008 2069770 6519776.00
Total 5088298 16028138.00

26. Total Energy Savings
(4 Years)
• Units = 5088298
• In Rs.. = 16028138/-

27. Future Project for Street Lights
• Installation of Load Managers in the Main Road
Switching Points
• Easy On / Off pattern accurately at altitude and
latitude base Sun Rise and Sun Set pattern by use of
microprocessors for 10 years programmes
• Total Dim down system
• Phase wise Dim down system
• Continuous filtered power
• Connection with the computer via GSM system for
monitoring the pattern at each switching point
including data collection of current voltage KW etc., it
should indicate the fault also.

28. Tri Generation Plant
• To Install Gas Fire Power Station and
A.C. Plant running out of exhaust of the
Gas Fire Plant (Tri Generation System)
• 5 to 10 MW capacity electrical
generation
• 3000 to 6000 Ton A.C. Plant

29. • Total Power Demand of Government Buildings
in Gandhinagar : 10 M.W.
• Total Electrical Bill for various Government
Buildings: Rs. 15 Crore
• Tri - Generation Project Cost : Rs. 40 to 45
Crore
• Pay Back Period for Tri-generation Power Plant
: Maximum 4 years
• Life of the Power Plant : Minimum 20 to 25
years

30. • Project Cost is bared by ESCROW
Agency.
• Savings out of the project is shared by
Government and ESCROW Agency.
• Installation, Operation and Maintenance
is carried out by ESCROW Agency.
• After the pay back period Government
can get total savings.

31. Thank you