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ENERGY AUDIT OF A PORT TRUST Mr. S. B. Sadananda & Mr. K.K. Chakarvarti

ENERGY AUDIT OF A PORT TRUST Mr. S. B. Sadananda & Mr. K.K. Chakarvarti. ENERGY AUDIT - PRESENTATION COVERAGE. EXISTING SYSTEM & ENERGY USAGE FIELD MEASUREMENTS & DATA ANALYSIS ENERGY CONSERVATION OPPORTUNITIES. ENERGY AUDIT. AREA COVERED: Port Electrical Network Tower Lights

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ENERGY AUDIT OF A PORT TRUST Mr. S. B. Sadananda & Mr. K.K. Chakarvarti

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  1. ENERGY AUDITOFA PORT TRUSTMr. S. B. Sadananda&Mr. K.K. Chakarvarti

  2. ENERGY AUDIT- PRESENTATION COVERAGE EXISTING SYSTEM & ENERGY USAGE FIELD MEASUREMENTS & DATA ANALYSIS ENERGY CONSERVATION OPPORTUNITIES

  3. ENERGY AUDIT AREA COVERED: • Port Electrical Network • Tower Lights • Shed Lights • Major Pumping Systems • Office Buildings- Lighting, Air-Conditioning • Residential Buildings

  4. ENERGY AUDIT EXISTING SYSTEMS & ENERGY USAGE

  5. ENERGY AUDIT PORT FACILITIES: Number of office buildings : 16 Number of residential buildings : 271 Number of water pump House : 86 Number of window AC : 262 Number of tower lights : 80 Number of sheds in operation : 14 Number of residential units : 8364 Number of flats occupied : 6718

  6. ENERGY AUDIT ELECTRICAL NETWORK:

  7. ENERGY AUDIT • AVERAGE MONTLY CONSUMPTION&COST • 24.75 LAC KWH • RS 113.25 LACS

  8. ENERGY AUDIT ELECTRICITY COST IN PORT OPERATIONS April 2004 to March 2005 Electricity Cost Accounts for 2.95% of Port Operating Expenditure

  9. ENERGY AUDIT Energy Conservation Activities carried out by PT: • Maintaining billing power factor of 0.99 • Installation of automatic power factor controllers in Primary and Secondary Substations • Maintaining 6.6 KV distribution network • Installation of T5 – 28 Watts FTL in select location -2100 Nos. • Automation of select pumping stations 6.Installation of HPSV lamps • Optimizing tower lights • Effective control of shed lights by shed superintendents • Computerization of electricity billing for domestic consumers and tenants

  10. ENERGY AUDIT FIELD MEASUREMENT AND DATA ANALYSIS

  11. K V A TIME – HRS.

  12. ESTIMATED DAILY ENERGY CONSUMPTION 83470 KWH/DAY Transformer energy requirement is 2.27% of total consumption, which is normal

  13. ENERGY AUDIT Illumination level at different locations:

  14. ENERGY AUDIT OPERATING LIGHTING VOLTAGE: Higher lighting voltage leads to excess energy consumption and Frequent burn outs.

  15. ENERGY AUDIT ENERGY CONSERVATION & COST REDUCTION POTENTIAL

  16. ENERY CONSERVATION OPPORTUNITIES DEMAND CONTROL – Network 1 • Observation: - Demand control is partially in practice. - Demand variation from 4904 KVA to 6368 KVA in Network 1 • Suggestions/Recommendation: - Demand to be controlled at 5500 KVA by maintaining peak load power factor in all feeders • Annual Savings Rs.8.2 lacs • Investment: - Present auto pf controller to be used effectively

  17. ENERY CONSERVATION OPPORTUNITIES DEMAND CONTROL – Network 2 • Observation: - Billed demand varies from 133 to 266 KVA - Registered demand varies from 104 to 110 KVA - Capacitor banks operated manually - Additional expenditure on excess demand Rs.4.08 lacs (April 2004 to March 2005) • Suggestions/Recommendation: - Contract demand needs to be revised - Demand revised to 266 KVA from Sept. 2005 • Annual Savings Rs.4.08 lacs • Investment: Rs.75,000/- for auto pf panel

  18. ENERY CONSERVATION OPPORTUNITIES Segregation of domestic supply: • Observation: - Port receives power at industrial tariff @ Rs.3.75/Kwh - Energy cost realised from Port employees @ Rs.0.9/Kwh free electricity to the tune of 100 Kwh to 300 Kwh per month per employee is provided by Port as part of welfare scheme. - Residential consumption accounts for 53% of Port energy requirement

  19. ENERY CONSERVATION OPPORTUNITIES Segregation of domestic supply: • Suggestions/Recommendation: - To discuss with Network 1 for charging residential consumption under domestic rate. - Supply power to residential complex from other Networks, in case Network 1 does not agree to the proposal - Installation of domestic appliances for conserving electricity and their by reducing the cost on welfare scheme - Suggested domestic appliances - T5 28 watt FTL , CFLs and one electronic choke on differed payment scheme • Annual savings – Rs.271 lacs.

  20. % DOMESTIC CONSUMPTION

  21. ENERY CONSERVATION OPPORTUNITIES Energy Efficient Lighting System • Observation: - 2100 Numbers of Energy efficient T5 –28 W FTL are in operation. ·  - Compact Fluorescent Lamps have been installed in walkways at after reducing Pole Height. ·        - Tower lights have been optimized as per the activity requirements. ·        - Effective control of shed lights by shed superintendents. ·        - 80 watts 5 feet Tube lights are in operation at different locations. ·        - The operating lighting voltage varies from 230 to 267 Volts. - The conventional Chokes consume additional Power of 12 to 15 watts per tube fitting.

  22. ENERY CONSERVATION OPPORTUNITIES Energy Efficient Lighting System • Recommendations: ·  - Installation of additional 1000 numbers of T5 FTLs. ·  - Installation of 500 Numbers of T5-FTL and 300 Nos. of CFL for Stair case lighting in residential buildings. ·  - Installation of voltage controllers for select buildings, Tower lights and Street light Circuits. - Installation of Low loss chokes will consume only 2 to 5 watts. • Annual Savings – Rs.21 lacs • Investment – Rs.38 lacs

  23. ENERY CONSERVATION OPPORTUNITIES Air conditioning System • Observation: - More than 262 Air conditioners are in operation. - 28% of A/C’s are in operation for more than 10 years. - 50% of A/C’s are in operation for more than 9 years. - Performance assessment of select air conditioners indicated the specific power consumption (Kw/TR)is 2.5 times higher than the designed power consumption.

  24. ENERY CONSERVATION OPPORTUNITIES Air Conditioning System • Recommendations: - Replacement of all defective air conditioner operating more than 10 years. - Replacing air conditioners after every 7 years. Considering the annual operating cost and the deterioration in performance. - Annual monitoring of A/C performance and assessment of specific power consumption. • Annual Savings – Rs. 15 lacs • Investment for 70 A/c – Rs. 21 lacs

  25. ENERY CONSERVATION OPPORTUNITIES Water Pumps • Observation: - Water pumps ranging from 7.5 KW to 50 KW are in operation. - Estimation of combined efficiency of select Pumps and Motors were carried out and identified low efficiency pumps. - Pressure gauges are available at some of the pumps.

  26. ENERY CONSERVATION OPPORTUNITIES Water Pumps • Recommendations: - 3 pumps needs replacements. - Pressure gauges to be installed at all the major pumps. - Pumps performance monitoring to be carried out yearly once. - Low efficiency pumps to be replaced/repaired. • Annual Savings – Rs. 1.78 lacs • Investment – Rs 1.2 lacs

  27. ENERY CONSERVATION OPPORTUNITIES North Roof Lighting and Transparent Sheets on Roof in Sheds • Observation: - Some of the sheds are provided with transparent sheets on the roof to reduce electrical lamps during day time. • Recommendations: - All new sheds to be provided with north roof lighting system. - Transparent sheets at different locations on the roof can be provided for the sheds which are in operation.

  28. ENERY CONSERVATION OPPORTUNITIES Installation of glass for windows • Observation: - Some of the office windows are provided with transparent glass and some are provided with opaque glass. • Recommendations: - windows can be provided with transparent glass. - A/C rooms to be provided with tinted glass only to restrict sun light/heat entry to the room.

  29. ENERGY/COST REDUCTION OPPORTUNITIES • Lighting voltage control: • Present Lighting Voltage : 240 to 257 • Lighting Energy consumption / month

  30. ENERGY/COST REDUCTION OPPORTUNITIES Estimated savings by Voltage control : 10% of present consumption = 1250 Kwh Annual Energy savings : 3.75 Lakhs Kwh Annual Cost savings : Rs.14.06 Lakhs Investment for Voltage controllers - Reducing tapping of the transformers - Installation of lighting controllers No of chokes Replaced : 1228 No. of Tubes Replaced : 7524

  31. ENERGY/COST REDUCTION OPPORTUNITIES • Installation of low loss chokes: Energy consumed by conventional :12 -15 watts chokes Energy Consumed by low loss chokes : 3 - 5 watts Average Choke Replacement/year : 1228 Annual energy savings for 1000 fittings : 0.36 lakhs Annual monetary savings : Investment for low loss chokes : Rs 2 lakhs

  32. POWER CONSUMPTION BY TUBE LIGHT

  33. ENERGY/COST REDUCTION OPPORTUNITIES • INSTALLATION OF T5 LAMPS POWER CONSUMED BY 40W FTL : 53 Watts POWER CONSUMED BY 28 W FTL : 32 Watts Savings per fitting : 21 Watts Annual savings for 1000 fittings for 300 days : 3 lacs kwh Annual monetary savings : Rs 11.25 Cost of T5 lamps with electronic ballast : Rs 7 lacs

  34. ENERY CONSERVATION OPPORTUNITIES STAIR CASE LIGHTING SYSTEM: AVERAGE KWH /DAY :3300 NO. OF BUILDINS : 268 INSTALLING 500 Nos. T5 –28 WATTS AND 300 Nos 20 W CFL ESTIMATED REDUCTION IN ENERGY : 1500 KWH/DA Y ANNUAL ESTIMATED ENERY SAVINGS : 5.47 LACS.KWH ANNUAL MONETARY SAVINGS : RS.20.5 LACS INVESTMENT FOR CFL FITTINS : RS. 9.0 LACS

  35. WINDOW AC

  36. SPLIT AC

  37. ENERGY AUDIT Air-conditioner performance:

  38. ENERGY AUDIT Air-conditioner performance: Additional power consumption with a necessary cooling effect.

  39. ENERGY/COST REDUCTION OPPORTUNITIES REPLACEMENT OF DEFECTIVE WINDOW AIRCONDITIONERS: Specific Power consumption by Std 1.5 TR M/C : 1.3 kw Power consumed by defective A/C : 3.2kw Additional Energy for 50 A/c for 300 days : 2.8 Lac kwh Annual monitory loss : Rs 10.6 lacs Investment for 50 Numbers 1.5 TR A/c : Rs 15 lacs

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