Hacker News new | past | comments | ask | show | jobs | submit login

That's true. Power to the fans and lights is pretty small. And the savings projected is also much less.

A compartment has about 120 seats with 8 seats in one section. So about 15 sections. Each section has 3 fans & 3 Lights.

With a guesstimate of 50 W per fan and 30 W per light, that is about 3.6 kW.

Most of the lights are off during day journeys and much of the night. Lights are mostly ON during 4 hours dusk-night time. Fans are ON almost 24/7.

For a 24 hour journey, we are looking at 60 kWH per compartment. Trains usually have about 20 compartments on avg. So about 1200 kWh per ride.

Diesel based power can be reliably put at about 20 Rs. / kWh (Grid power is about 5 Rs. / kWh).

So assuming a completely solar powered ride, about 24,000 Rs. saved for a 24 hour ride. Close to about 370 USD.

About 135000 USD saved per year + additional cost in terms of power gen. eqpt. maintenance, labor, etc.




Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: