Energy Conservation in Sachivalaya Complex

Gandhinagar Part 2

By Er Uresh MehtaPast Chairman, GSC & Chief Engineer(Electrical)

(retd)Roads & Building Department

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

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 hours

Replacement of Street Light Fittings in the campus

Advantages of Metal Helide Fittings

• The consumptions reduced by approx. 40%

• Less Maintenance Problems

• Better White Illumination

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

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.

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

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

Replacement of A.C.

Replaced old window type air condition machines by new 130 Nos.

AdvantageSavings in EnergyReduction in M & R CostIncrease the efficiency

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

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

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 315632742005-2006 7051260 305189722006-2007 7505070 32193587

2007-2008 7460670 32930164

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 407880 2948105/-

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.

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/-

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 = 16.00

lacs

Total Project Cost Rs. 138.00 Lacs

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

“Energy Saving in Street Light

at Gandhinagar

Township”

Existing Installations

• 250 / 400 Watts Mercury / Sodium Fittings 2403 Nos

• 150 / 125 Watts Mercury / Sodium Fittings 1306 Nos.

• 70 Watt Mercury / Sodium Fittings1729 Nos.

• 11 Watt C.F.L. Fittings 537 Nos.

• 100 Watt I.N.C. Lamp 9240 Nos

• Total Switching Points 134 Nos.

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

Tentative SavingsEnergy 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 = 2354250Saving in Rs. 7651312

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.

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

Energy Saving in Last Four Years Considering 2003-2004 as a Base

LineYear

(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

Total Energy Savings (4 Years)

• Units = 5088298• In Rs.. = 16028138/-

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.

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

• 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

• Project can be taken in ESCROW route

• 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.

Thank you