p Proposed modernization of Existing Unit # 6 (500 MW) by Change of Fuel Presentation Title ( Arial, Font size 28 ) at Date, Venue, etc ..( Arial, Font size 18 ) Trombay Thermal Power Station, Mumbai Unit # 6 Modernisation by change of fuel 1 …Message Box ( Arial, Font size 18 Bold)
Trombay Thermal Power Station (TTPS) Location • Part of the Greater Mumbai Area; Trombay • Coordinates of Unit # 6 stack - 19 O 00’12.66’’N, 72 O 53’51.60’’E TTPS • Nearest Railway station Kurla/Chembur : 7 KM • Nearest Airport : Chhatrapati Shivaji International Airport 12 KM. Unit # 6 Modernisation by change of fuel 2 …Message Box ( Arial, Font size 18 Bold)
Location of Trombay Thermal Power Station U# 6 U# 5 U# 8 U# 4 U# 7 Unit No. Commissioned in Capacity (MW) 5 (Coal) 1984 500 6 (Oil/Gas) 1990 500 7 (Gas) 1993 180 8 (Coal) 2009 250 Total - 1430 Unit 1,2 & 3 decommissioned in early 90’s *Unit 4 is in standby mode (150MW) Unit # 6 Modernisation by change of fuel 3 …Message Box ( Arial, Font size 18 Bold)
Need for the Modernization of Unit # 6 by change of fuel • Trombay Thermal Power Station (TTPS) provides power to the city of Mumbai • At present 2377 MW is embedded generation for Mumbai • Presently, peak power demand of Mumbai City is about 3391 MW • Demand is expected to increase to 6200 MW by 2020 • Unit # 6 needs to be operated at full capacity to meet the growing demand • • High price of low sulphur oil results in very high cost of generation in Unit #6 High price of low sulphur oil results in very high cost of generation in Unit #6 • Natural gas is not likely to be available for next 10 years • RLNG prices are very high and volatile • Modernization of Unit # 6 on coal will ensure cheap power to Mumbai • Embedded generation to be maintained at Trombay for success of islanding scheme Unit # 6 Modernisation by change of fuel 4 …Message Box ( Arial, Font size 18 Bold)
Alternative 4: Unit # 6 on low ash low Sulphur coal and modernization • Use of Imported coal having low sulphur (0.28%) and low ash (4.5%) • Multi fuel firing capability will be retained • No change in the capacity of Unit #6 (500 MW) • No additional land acquisition required • No additional water allocation required • No additional discharge of waste water • Reduction in pollution load due to installation of ESP and FGD • Noise abatement by use of acoustic barriers, robust structural designs • No additional power evacuation required • Shortest gestation period • Incremental capex for modernization (Change of fuel) Unit # 6 Modernisation by change of fuel 5 …Message Box ( Arial, Font size 18 Bold)
Key components of Unit #6 modernization • Augmentation of existing captive coal berth from 2.4 to 4.4 Million MT/Annum • Closed pipe conveyors for transportation of coal from coal berth to plant • Installation of stacker reclaimer and screw unloader at Coal Berth/ storage • Installation of State-of-the Art high efficiency NOx burners • Installation of FGD to treat 100% flue gas for SO 2 removal • Installation of FGD to treat 100% flue gas for SO 2 removal • Installation of high efficiency ESP for PM control • 100% ash utilization from day one Unit # 6 Modernisation by change of fuel 6 …Message Box ( Arial, Font size 18 Bold)
Benefits of Unit #6 Modernisation • Reduction in transmission congestion • Lower tariff to Mumbai consumers on account of reduced cost of generation • Ensuring uninterrupted and reliable power supply to consumers of Mumbai • Ensuring islanding capability for Mumbai • • To meet demand supply gap for Mumbai To meet demand supply gap for Mumbai Unit # 6 Modernisation by change of fuel 7 …Message Box ( Arial, Font size 18 Bold)
Details of the EIA study Unit # 6 Modernisation by change of fuel 8 …Message Box ( Arial, Font size 18 Bold)
EIA details • EIA study carried out within the 10 km radius from TTPS as per EIA Notification, 2006 and as per ToR/ additional ToR issued by MoEF for the period from March to May 2012 • All studies carried out as per ToR • Air Quality Monitoring carried out at 7 locations within the study area • • Ground water and surface water quality monitoring carried out at 4 locations Ground water and surface water quality monitoring carried out at 4 locations each within the study area • Soil quality monitoring carried out at 5 locations within the study area • Meteorological parameters were monitored during the study period at site • Air Quality Modeling carried out using ISCST3 model to study the impact on surround air quality Unit # 6 Modernisation by change of fuel 9 …Message Box ( Arial, Font size 18 Bold)
Environmental Settings Sr. No Particulars Details 1 Elevation above MSL 3 m Annual Mean Max Temp: 31.2 0 C 2 Climatic conditions Annual Mean Min Temp : 23.7 0 C (Annual as per IMD-Colaba) Annual Rainfall : 2146 mm Maximum Temperature: 33.4 0 C 3 Climatic conditions Minimum Temperature: 22.7 0 C (Summer as per IMD- Colaba) Rainfall: 4.4 mm 5 Site specific climatological Maximum Temperature: 39.4 0 C Minimum Temperature: 21.4 0 C data (Summer season 2012) Rainfall: Nil 6 Nearest Highway Sion Panvel Highway about 6 KM 7 Nearest Railway station Kurla Railway Station about 7 km 8 Nearest Air Port Chhatrapati Shivaji International Airport about 12 km 9 Reserve Forest Nil in 10 km Radius 10 Ecologically sensitive zones Nil in 10 km Radius 11 Archaeological monuments Elephanta caves about 5 km 12 Water bodies (River/ Lake)) Ashish Lake at about 4km 13 Defence Installations BARC, Naval Communication Centre within 1 km area from site 14 Seismic Zone III Unit # 6 Modernisation by change of fuel 10 …Message Box ( Arial, Font size 18 Bold)
Ambient Air Quality Monitoring Locations Predominant wind direction NW to SE (towards sea) Unit # 6 Modernisation by change of fuel 11 …Message Box ( Arial, Font size 18 Bold)
Ground Level Concentration (GLC) Incremental contribution to GLC SO 2 ( � g/m 3 ) NOx ( � g/m 3 ) PM ( � g/m 3 ) Particulars Scenario 1: 3.91 4.58 2.24 Existing Operations on oil Scenario 2: After modernization on 3.85 4.43 1.94 coal coal Change -0.06 -0.15 -0.3 Change % -1.5 -3.3 -13.4 • ISCST 3 modeling was carried out to find out worst case GLC of the pollutants • Study reveals decrease in the pollution load due to installation of air pollution control equipment Unit # 6 Modernisation by change of fuel 12 …Message Box ( Arial, Font size 18 Bold)
Ground Level Concentration • The air quality simulation result shows that after Unit #6 modernization the worst case maximum GLC’s of all the pollutants is predicted in South East direction at about 4.5 km from the project site towards sea • The nearest location in SE direction where the baseline AAQM monitoring carried out was is Nhava village • The base line concentration of the pollutants at Nhava Village are meeting NAAQ standards except PM 10 (marginally higher) due to various ongoing construction activities of roads, housings etc. Unit # 6 Modernisation by change of fuel 13 …Message Box ( Arial, Font size 18 Bold)
Particulate Emission from Unit #6 stack PM Particulars (mg/ Nm 3 ) Unit #6 on Oil 83 Unit #6 on Coal 50 Change Change - 33 - 33 Change % - 40 • As per the analysis report, LSHS has 0.1% ash content • There will be 40% reduction in PM emission after coal conversion Unit # 6 Modernisation by change of fuel 14 …Message Box ( Arial, Font size 18 Bold)
Barge Traffic due to Coal Movement After Unit 6 Parameters Existing modernization project No of Ships per Annum 42 68 Marine traffic In Mumbai 5935 5961 harbour (JNPT/MbPT) % contribution in Traffic due 0.7% 0.71% to Tata Power 1090 barges with 1 2000 barges with 2 Number of Barge Traffic for unloader. unloaders. Tata Power in Mumbai Sea Barge capacity is 2200 MT Barge capacity is 2200 MT. • % change in traffic due to Tata Power after Unit #6 modernization will be 0.01% • The ships are anchored at the outer anchorage inside the deep sea • Currently 70% of coal requirement of Tata Power is met through its own jetty and 30% by rail transportation Unit # 6 Modernisation by change of fuel 15 …Message Box ( Arial, Font size 18 Bold)
Marine assessment findings by CMFRI • Marine impact assessment has been carried out by Central Marine Fisheries Research Institute (CMFRI), Mumbai • No evidence of any major environmental damage to marine environment due to existing operations of Coal Berth which is already in use for unloading coal for the plant as well as operation of barges to carry coal to the coal berth • Sea water quality in the study area adjacent to the TTPS is comparatively better than other locations like Mahim, Versova, Gorai, etc. • Marine environmental impact due to increased barge movement in the area will be minimal and of minor nature, considering the current baseline status of marine environment • Existing systems to prevent sucking of juvenile forms of marine animals at the water intake point appear to be adequately designed to minimize damage to marine ecology Unit # 6 Modernisation by change of fuel 16 …Message Box ( Arial, Font size 18 Bold)
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