Transcript Green Initiative on Rail Coaches – A Case Study of

Green Initiative on Rail
Coaches – A case study
of Northern Railway
Some Green Initiatives Taken in Recent Past
1. Solar Powered BG Coach
2. LED Lights in existing Rail Coaches
3. External feed during maintenance of
EOG trains
4. Adopting Head on Generation (HOG)
system – Feeding EOG train from
Locomotive
Use of Solar Energy to Power Rail Coaches
N.Rly for the 1st time experimented feeding of
lighting load on Narrow Gauge rail coaches of
KLK-SML & Kangra Valley sections by Solar PV
cells in 2012
The cost of Electrical energy in SG/EOG
systems is above Rs 15-20 per unit
Solar PV based electric energy on the top of
coaches can reduce to power Rail Coaches
with benefit of green energy
Narrow Gauge Rake with Solar PV cells on the top
 After getting success on NG coaches One BG GS coach
was provided with Solar PV units for technology
demonstration.
 Unit details:
 Area available on the coach = 40 m2
 12 Panels of 300Wp each = 3.6kWp
 Area covered by 12 panels = 24 m2
 Area left uncovered = 16 m2
 Each Module has 72 cells (0.416V)
 Solar Panel System voltage
=
120 V
 Rating of Charge Controller
= 110V, 30A (Voltage
range 90-135VDC)
 Total weight of system @ 22 Kgs/module = 264 Kgs
 The system uses existing coach battery of 120Ah, 110V
Trial run results of December, 2014
 During Winters:
 Generation period = 7 Hrs (10.00 to
17.00 Hrs)
 Average generation is about 6.5 Amps
 Maximum current generated = 13.5 A
 Average Power generated = 5.1 kWh
 Power req. with 12 hrs working/day in
winters with LED lights = 3.17 kWh
Likely Generation in Summers
 Generation period = 12 Hrs (06.00 to 18.00
Hrs)
 Power generated = 11.4 kWh
 Total power requirement/day in summers with
12 hrs working = 13.5 kWh
 Enhanced Capacity of the system covering
full roof area = 9 kWp
 Generation with full roof covered = 19 kWhp
 This can meet requirement of Non AC coach
with over 15 Hrs coach working
Challenges faced in system installation
 Designing the system to take care of
wind pressure upto a speed of 120kmph
 Giving aerodynamic shape to the
complete assembly
 Matching the channel of the panel with
the coach body channels
 Taking extra precaution by strengthening
& welding the bolts & channel together
 Ensure no water leaks from the bolt
fixing points
Challenges faced in system installation
 Keeping height of panel within SOD
 Reducing coach electric load by
providing LED lights & BLDC fans
 Fixing of Charge Controller inside the
coach above Rotary Junction Box
 Providing facility of connection with the
adjoining coach
Future ahead
 A system can be adopted wherein the solar PV
module coach can work independently without
alternator & having TC with the adjoining coach
 This will greatly increase the coach availability as
line failures on account of Alternator/Belt will
reduce
 Higher capacity PV cells can be explored to
enhance generation capacity
 PV cells may be of laminated type and provided as
part of roof only
 Modules may be provided on the side & End walls
of the coach to enhance the capacity by 30%
 Higher capacity VRLA battery bank be used
Financial viability of system with complete roof
covered with PV modules
1. Cost of provision of solar panel = 6.0 Lacs/coach
2. Saving with solar panels/coach/annum = Rs 1.27 Lacs
• Av. Generation by solar energy for the complete year
= 9.55 Units/Day
• Saving with solar panel per annum = 3486 Units
• Saving of revenue @ 15.88/Unit = Rs 55,358.00/Annum
• Saving due to low maintenance = Rs72,000.00/Annum
• Effective saving per year = Rs 1,27,358.00/Annum
3. ROR is about 5 years
LED Light retrofit in existing Rail Coaches
 Existing coaches are provided with FL tubes
of 18/20W or 2 CFLs each of 11W
 N.Rly developed specification for retro-fitment
with LED lights of 9W replacing existing 18W
FL
 Lux level improved by more then 40%
 Passenger Feedback is excellent
 Improved lights giving better aesthetic &
feeling of safety
 Colour temp. 6000-7000k (White Light)
 Colour rendering index ˃ 70
 Protections for Short Circuit & current limiting
 The ROR in non AC/LHB coach is about 2 yrs
Use of Energy efficient LED lights in TL coaches
Improvement in Lux level with LED lights in TL
coaches – Train no. 12472/71
With LED lights
With Tube Lights
Lumen
Lumen
Cabin 1
87
46
Cabin 4
85
44
Cabin 8
88
47
Location
Provision of 750V External supply during
maintenance for EOG trains
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



This provides an average saving of 240Ltrs HSD/rake
Average saving of DG set running ≃ 4-5 Hrs/day/rake
Average annual saving per rake ≃ Rs 25 Lacs
Used existing system/equipment (50/60 kVA Trs.)
Provided at NDLS, NZM, DEE, ANVT, ASR & JAT depots
HOG Scheme
 Running of 12005/06 NDLS-KLK Shatabdi
Express on HOG scheme started from
21.2.2011
 Second STB, 12045/’46 CDG-NDLS started on
16.05.2014
 Approximate fuel saving – 1500 Ltrs per trip @
Rs 75000.00 per trip
Thanks for remaining
interactive
Schematic diagram
Solar Module
300Wp
300Wp
300Wp
300Wp
300Wp
300Wp
300Wp
300Wp
300Wp
300Wp
300Wp
300Wp
JUNCTION BOX
EXISTING BATTERY BANK,
110V, 120Ah
CHARGE CONTROLLER, 110V, 30A
LOAD
Shifted Rotary Junction Box
Charge Controller
Coach with
Solar panel
without
alternator
Normal Coach
with 4.5 kW
alternator
Coach with Solar
panel without
alternator
Normal Coach
with 4.5 kW
alternator
Saving due to maintenance in solar coach

For a rake of 20 coaches
 Minimum 2 skilled & 2 unskilled staff
are deputed for underframe
 Minimum staff/day/coach = 0.1 skilled &
0.1 unskilled
 Staff expenditure/coach/month =
0.1 x 35000 + 0.1 x 25000 = 3500 + 2500
= 6000.00
 Staff expenditure/coach/year = 12 x
6000 = 72000.00