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Team-BHP Support ![]() | ![]() Quote:
For example, lets say you have an engine that has max efficiecny at 2200rpm. You can continously run this engine only at this RPM. Electric motor has instant torque, so in stop and go traffic, it will be a boon. you can use a gas turbine, and always run at 10,000 rpm i.e. max efficiency. Therefore it does make sense to use a diesel generator, or any other Ic engine, esp in city vehicles. When the battery is charged, you can switch off the diesel gen, and recover energy while braking. I think london city bus is moving to this diesel electric thingy. | |
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![]() | #17 | |
Distinguished - BHPian ![]() Join Date: Jun 2012 Location: BengaLuru
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![]() | #18 | |
Senior - BHPian | ![]() Quote:
London is just starting a trial now. NewYork transit started in 1999 and now operates a fleet of 800 Hybrid buses http://www.nrel.gov/vehiclesandfuels...ybrid_nyc.html | |
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![]() | #19 |
BHPian Join Date: May 2010 Location: Chennai
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| ![]() I have two points for clarification: 1. Battery: What about the battery life? How long do these generally last? They must be quite expensive to replace, correct? I was just thinking of a normal mobile phone battery. The overall backup when you buy a new one is about a day. This then becomes something like half-day in a year or so and you end up discarding it all together! Does the automotive batteries (like the one used in this case) work on the same principle too? If this is the case, then 7rs/km needs to be "re-calculated"!!! 2: Transmission: How does the transmission work for buses like this? Last edited by ajman28 : 16th January 2014 at 14:08. |
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![]() | #20 | |
Team-BHP Support ![]() | ![]() Quote:
So at 15rs/km cost saving, you can see this is about 7.5 million rupees saved, or 75 lakh saved. However, you have to realize that cost of fuel will keep going up, however electricity costs do not follow the same extreme raise cycle. Moreover, electricity is a local resource, and fuel affects balance of payments. So its always better to have atleast a part of transport system replaced by electricity. | |
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![]() | #21 |
Senior - BHPian Join Date: Nov 2006 Location: Bengaluru
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Infractions: 0/1 (4) | ![]() About 60-70% of installed power generation in Karnataka is Hydro+Solar+Wind. However close to 50% of power is generated using these resources. A plant to produce Methane from food waste was started a few days ago. If people in power use some common sense using appropriate fuels for different applications, it does reduce the carbon footprint considerably for public transport. Ofcourse private companies need to pitch in developing new alternatives aggressively also. |
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![]() | #22 |
BHPian | ![]() BYD finally hits Bangalore Roads. |
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![]() | #23 | |
BHPian Join Date: Aug 2013 Location: Pune
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How bout getting the facts right before posting stuff like this? An electric motor is much more efficient than an ICE based engine as the ICE based engine dissipates so much energy as heat. So even if the electricity generated is from Coal, this is a greener alternative as compared to blowing soot in our children's faces. We also save much so much money spent on importing oil. Hats of to BTMC to making this test happen! I hope they procure these buses and make this a reality. I have have blogged on the technical aspects of the BYD electric bus including details of the battery pack. I also have listed some alternative options that transport authorities could consider like the Trolley system. This is a great move for sustainable transport in India! Last edited by kamyfc : 1st March 2014 at 09:57. | |
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![]() | #24 |
Senior - BHPian Join Date: Nov 2006 Location: Bengaluru
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Infractions: 0/1 (4) | ![]() BMTC has floated a global tender for procuring 50 diesel hybrid buses and expects to have them running by 5 months. |
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![]() | #25 |
BHPian Join Date: Dec 2012 Location: Bangalore
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| ![]() There are quite a few technologies that allow even polluting power plants (e.g., coal fired, etc ...) to get a lot cleaner. For example, a lot of advance has been made in various carbon capture and storage (CCS) methods at the point source. These technologies work well only on a very large scale and hence trying to miniaturize them will not work on a small scale, for e.g., vehicle tail pipes. Adoption of CCS methods at our power plants will more or less negate pollution, which then is a mute argument for those who claim that the source is only shifting from tailpipe to smoke stack. Adoption of CCS notwithstanding the earlier we adopt EV tech the better it is for our Country on the long run, BMTC is once again doing a super job of thinking ahead! Kudos! |
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![]() | #26 |
Senior - BHPian | ![]() Excellent move to at least try it under real-life conditions in namma Autoluru. However, I want to point out that if BMTC somehow enforces a eco-friendly driving style on their drivers, they can potentially save immense amounts of diesel and cause far far less pollution! It pains me to see the way many BMTC buses are driven aggressively with totally uncalled for acceleration in too low a gear (i.e. at high engine RPMs) only to SLAM to a stop 20 metres at the next congestion point. A simple example are the poor Volvos which are usually found lurching and swinging wildly on their air suspensions because the nincompoop has (totally unnecessarily) locked the autobox in a lower gear rather than accelerating peacefully in D mode. A saner green mode of driving will save money and also save our lives! |
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![]() | #27 |
BHPian Join Date: Aug 2011 Location: Germany
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| ![]() BYD seems to be ploughing ahead with its plan to sell e-buses globally. Its LA bsed subsidary in North America recently won an order for ten buses from the long beach transit authority. A BYD e-bus successfully completed a two month evaluation by the NY Metropolitan Transportation Authority I guess we will be seeing more of these e-buses. Kudos to BMTC for being the first state undertaking to evaluate and order these buses. Completely agree that there is potential to save fuel through better driving habits - but I suppose thats easier said than done. |
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![]() | #28 |
Senior - BHPian Join Date: Mar 2008 Location: Mumbai
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| ![]() After BYD K9, Gujarat is also proposing to introduce introduce electric-powered vehicles in the public transport system. The Gujarat Government has proposed to introduce a fleet of electric buses for public transport, which will shuttle between Gandhinagar and Ahmedabad. In the initial phase, 15-20 mini electric buses will be inducted to the fleet, with a seating capacity of 40 passengers each. Link to News Article Last edited by S2!!! : 14th July 2014 at 15:57. |
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![]() | #29 |
BHPian Join Date: Nov 2009 Location: Pune
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| ![]() Are these paid for by the JNNURM scheme? Last edited by Pacifica : 14th July 2014 at 16:58. Reason: Didn't see the earlier posts. |
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![]() | #30 |
Senior - BHPian Join Date: Mar 2008 Location: Mumbai
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