Monday, 11 September 2017

Carbon Intensity of Electricity Production

So, how clean is the energy produced in your country?
 ( in g CO2 per kWh )

France   :   83
Japan     :   483
Portugal :   525
USA      :    613
Netherlands :  652
China :          788
India  :  933

Any guess why such a wide range?



Tuesday, 27 September 2016

Recycling in Railways

  1. Using Crossing Plates made up of recycled polymers ( this is being done in Japan ).
  2. Using Hard ResidueParticles ( that come out of crushed pottery or glass ) instead of ballast.
  3. Using ballast mat and slab mat.

Monday, 26 September 2016

Noise Pollution mitigation


Anything between 50 dB to 90 dB is noise.

In Railways, following strategies can be adopted:

  • Tall barriers along track at vulnerable locations.
  • Screened portals along track at select locations.
  • Low level accoustic barrier.
  • Using hoolow axle wheel sets and modified brake system.
  • Rubber in steel girder bridge.
  • Aero stream nose in high speed. 
  • Using machines with low noise.
  • Using honeycomb filled double skinned Al-Alloy bodies to insulate passenger area.
  • Running underground trains.
  • Floating slab track (FST) on viaduct sections.( reduces noise by 10 dB)
  • Low vibration Track (LVT) in tunnels.












Thursday, 7 July 2016

EPI index 2016 is out

Yale University is out with 2016 EPI rankings.


India ranks 141 this time, better than last year ( 2014 rank)

World as a whole is doing worse in fisheries.

Sunday, 3 April 2016

Particulate pollution in India

Anything < 10 micromtrs gets into lungs.

Beach Sand is PM90,Human Hair is PM70,Dust is PM10, and Combustion Particles are PM2.5

 

 

Tuesday, 22 December 2015

Pollution caused by transportation



For Passenger traffic:

Aviation:

0.24 Kg CO2 / psrmile    short plane

0.18 Kg CO2 / psr mile   long plane


Cars


0.44 Kg CO2 / psrmile

Bus

0.3 Kg CO2/ psrmile


Rail

0.16 kgCO2/psrmile

An engine consumes 30 units / km



For freight traffic: ( Kg CO2)

0.8 / ton-mile ( by air)
0.17 /............by truck
0.14..............by train
0.04 .............by Sea

Tuesday, 27 October 2015

Alternate use of plastic waste

India generates huge plastic waste . India has lots of potholes on roads. Can the dots be joined?

Here is an interesting story:

http://www.theweekendleader.com/Innovation/1181/plastic-smiles.html


Another story abour 'Plastic man" of India

http://www.bloomberg.com/bw/articles/2014-07-10/indias-plastic-man-chemist-turns-litter-into-paved-roads

Then there is a video

https://www.youtube.com/watch?v=uZDrk29TnZA

Another video story

http://www.dailymotion.com/video/xbssh6_indian-firm-builds-roads-using-plas_tech