1 / 30

Contents

IMPROVEMENT OF ENERGY EFFICIENCY IN THE STREET LIGHTING SYSTEM OF THE COLOMBO CITY H.K. ILLEPERUMA H.R.P. WANNIARACHCHI SRI LANKA ENERGY MANAGERS ASSOCIATION H.H.D. NANDASENA COLOMBO MUNICIPAL COUNCIL. Contents. 1.Colombo City – Statistics 2. Present Street lighting system- Colombo City

damian-rodriquez
Download Presentation

Contents

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. IMPROVEMENT OF ENERGY EFFICIENCY IN THE STREET LIGHTING SYSTEM OF THE COLOMBO CITYH.K. ILLEPERUMAH.R.P. WANNIARACHCHISRI LANKA ENERGY MANAGERS ASSOCIATIONH.H.D. NANDASENACOLOMBO MUNICIPAL COUNCIL

  2. Contents 1.Colombo City – Statistics 2. Present Street lighting system- Colombo City 3. Present Street lighting system-Selected Area 4. Findings of the Survey 5. Possible Energy Saving Measures 6. Implementation Plan

  3. Statistical Data of Colombo City • Area 37 sqkm • Population 1.7 million • No of Retail Customers 120,000 • No of Bulk Customers 1200 • Total Electricity Sales 790 GWh/year • Electricity Units billed for Street lighting 10 GWh/year

  4. Colombo City • Electricity Distribution System is operated and maintained by Ceylon Electricity Board • Street Lighting System is operated and maintained by Colombo Municipal Council (CMC) under 6 districts

  5. Present Street Lighting System Recently CMC has adopted following basis in installation of Street Lights

  6. Present System Contd.. • There are about 12,000 Street Lamps in the CMC Area • 834 MWh of energy is consumed per month @ Rs 7.80 per unit, results in a monthly bill of Rs 6.5 million

  7. Present System Contd.. • Operation of Street Lights • 30% Automatically using photocells • 70% Manually • Electricity Supply to Street Lights are from both overhead and underground lines

  8. Present Street Lighting System- Kirulopane Area Number of lamps in the District 4 (Kirulopane Area) 66 385 262 70 W SV 150W SV 250W SV 448 125W MV 716 250W MV

  9. In Study Area .... Classification of Roads 1. Main roads with high vehicular traffic 2. Roads connecting to main roads with substantial vehicular traffic and pedestrian traffic 3. Roads leading to residential areas and terminating.

  10. Details of Street Light Luminaries in the Study Area Robert Gunawardana Mw and Balapokuna Road connect to other main roads, carry considerable vehicular traffic.

  11. Findings of the Survey • Luminaire Mounting Height & Height of Pole • Spacing of Lamps & Span of Poles • Luminaire Position • Switching Systems • Lumen output of Lamps & Type of Lamps • Maintenance of Street Lighting System

  12. Possible Energy Saving Measures • Use high efficacy bulbs & ballast • Use more efficient luminaries • Timely Switching on/off • By proper lighting design • By switching off some lights during low traffic periods • By dimmer units, reducing luminance during low traffic hours • Proper maintenance scheme.

  13. Possible Energy Saving Measures • Use high efficacy Lamps & ballast • Replacement of Mercury Vapor lamps with High pressure Sodium Vapor lamps. • 125W MV ----> 70W SV • 250W MV ----> 110W SV • This can be done in two ways • Replace complete fitting for very old lights • Replace only the bulb & ballast for fairly new lights

  14. Description Study Area (14 lamps) District 4 (385 lamps) Investment Rs.73,500 Rs.2,021,250 Annual Saving Life Cycle Saving Rs.66,961 Rs.293,4912 Rs.1,841,440 Rs.8,068,830 Pay-back Period 13 months 13 months • Replacement of Mercury Vapour Lamps with Sodium Vapour Lamps • 250W MV Lamps  110W SV Lamps

  15. 125W MV Lamps70W SV Lamps • Can be installed along roads in residential areas • Recommended Mounting height is 6m at 30 to 35 m intervals • In future all the new installation in the residential areas should be with 70W SV

  16. 125W MV 70W SV Lumen output 6875 8750 Annual energy consumption 548 kWh 307 kWh Annual energy cost Rs. 4,271 Rs. 2,391 Life cycle energy cost Rs. 23,400 Rs. 13,104 Cost of fitting Rs. 4,600 Rs. 4,500 Life cycle cost Rs. 28,000 RS. 17,604 Life cycle Saving Rs. +10,396 Comparison Between 125W MV & 70W SV

  17. Complete fitting Bulb only Annual energy saving 241 kWh 241kWh Annual energy saving Rs. 1,879 Rs. 1,879 Life cycle energy saving Rs. 10,296 Rs. 10,296 Investment Rs. 4,500 Rs. 2,000 Payback period 29 months 13 months Life cycle saving Rs. 5,796 Rs. 8,296 Comparison between the replacement of 125W MV complete fitting and replacement of 125MV bulb & ballast only.

  18. Possible Energy Saving Measures • Timely switching on/off • Fixing of photoelectric cells for automatic operation of lamps (for circuits & individual lamps)

  19. Description Study Area District 4 Colombo City Investment Rs.86,400 Rs.780,000 Rs.5,040,000 Annual Saving : Energy Labour Total Saving Rs.15,374 Rs.73,000 Rs. 88,374 Rs. 170,229 Rs.511,000 Rs.681,229 Rs. 1,106,060 Rs.3,285,000 Rs.4,391,060 Payback Period 12 months 14 months 14 months Costs & Benefits of the Proposal

  20. Possible Energy Saving Measures By proper system design • The level and uniformity of luminance along a road depend on several factors • Lumen output of the light source • Luminaire distribution • Mounting height • Luminaire position and • Spacing • Installation arrangement

  21. Luminaire Mounting Height & Height of Pole

  22. Spacing of Lamps • It is required to maintain equal distances between street lamp poles. • Most effective distance is 35m to 40m. • It is not economical to erect additional poles for street lighting to maintain the equal spans in the existing system.

  23. Overhang & Angle of Tilt • Overhang and Angle of tilt vary with the following • Width of road • Lumen Output of the lamp • Height & Spacing of the poles • The most effective angle of tilt is 5 to 10 degrees and overhang is 0.75 to 1.5 meters, depending on the width of the road.

  24. Possible Energy Saving Measures Maintenance Scheme for Street Lighting • Improve the light levels in the city and gradually the wattage of the lamps could be reduced. • Provide benefits not only the energy conservation but also the other benefits in terms of public safety, security, convenience and comport during darkness. • Maintenance program twice a year.

  25. Maintenance of the Street Lighting Should Include .... • Luminaire Maintenance • luminaire cleaning is required to maintain designed lighting levels. • loss of lumen output of light sources due to normal aging • Support Structure Maintenance • Electrical Distribution and Control System Maintenance • Pruning of trees which disrupt light distribution

  26. Implementation Action Plan

  27. Implementation Action Plan

  28. Implementation Action Plan

  29. Thank You !

More Related