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Project Details


The Indian Railways being one of the largest railway networks in the world operates around 12,000 trains per day. It is also one of the largest consumers of diesel in the country, with an annual consumption of 2.7 billion litre, which includes traction requirement as well as coach lights, fans, AC, etc. The train rooftops remain continuously exposed to the sun during the day 24*7, except during cloudy days. In Indian conditions, the number of sunny days is 300 (out of a total of 365 days in a year). Thus solar energy was being wasted; In fact it was further heating the coaches resulting in increased cooling requirement. If the train roof tops could be covered by specifically designed flexible solar panels, then the train will become a mobile source of generating electricity (solar energy) from solar radiation. It is also expected that by covering the roof using the solar panels the coach temperature may come down by 2 deg C giving comfort to the passengers.The flexible crystalline solar panels were designed especially for the railway coach roof. The fail-safe pasting technology is used to fix the panel on the railway coach roof. The pasting technology consists of three components; special type of tapes along with the adhesives is used to affix the flexible solar panel on the railway coach. In order to provide safety to the flexible solar panel a special type of tape is used to cover all the edges of the flexible solar panel. The use of the specialized pasting technology ensured proper performance of the plant at a wind load of 200km/ hr (with train running at 100km/hr) and roof surface temperature of 60 deg C to 70 deg C.

1“Installation of Roof Top Solar Plant on passenger coaches”-At DBWSN.F. Railway Mechanical Workshop, Dibrugarh5940W
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