Reply With QuoteRadio Interview, worth a listen.
UK to ban petrol vehicles by 2040. Will it happen in Australia? - The Daily Drive - Omny.fm
RoverLord
Perhaps a summary would be that the technology necessary to use a battery/electic system for passenger cars (and even utes and vans) is close to being in place, at least for areas with a sufficiently high population density that distances are fairly short.
But this does not mean that the technology is anywhere near for replacing internal combustion engines for road or rail or water or air transport. These applications require far greater range than is required for most passenger cars, and far greater availability. To give some examples - most long distance road transport requires a vehicle range in excess of 1000km, and the space and mass for batteries is simply not possible in a typical prime mover. And expensive prime movers cannot be left sitting for hours to recharge, even if the local power grid could easily supply power at the rates needed.
Similarly, the daily train to Dubbo from Sydney has a turnaround in Dubbo of about half an hour. Clearly nothing like enough time to recharge. Other stops except Sydney are only minutes. In other words, a range required for the round trip of close to 1000km, with a power requirement of 4,000hp, of the order of 100 times the power and hence energy consumption of a typical electric car. Even if it could carry the volume and mass of batteries using existing technology, charging in a reasonable length of time, even the nine hours or so spent in Sydney would be very challenging.
And then there is the issue of farming, mining, and earthmoving equipment, which may be operated in some cases hundreds of kilometres from any grid power, possibly in use with shifts of drivers on a 24hr basis.
And then there are all the ancillary uses of internal combustion engines - backup power for selfcontained power systems and grid outages, ground power units for aircraft, not to mention lawnmowers, small boat engines, etc etc. Battery technology has a long way to go before most of these can feasibly be replaced by battery-electric devices.
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
ForumSage
Radio Interview, worth a listen.
UK to ban petrol vehicles by 2040. Will it happen in Australia? - The Daily Drive - Omny.fm
ForumSage
I dont know what all the fuss is about,
They have Electric Busses in Moscow for decades & go all day without any need for a recharge
RoverLord
They had them in Sydney and Brisbane seventy years ago - but they were replaced by diesel buses, in both cases because the trams were also replaced by diesel buses, so there was no longer a DC power system for them. The problem with trolley buses is that they can only go on routes with the necessary wiring, and that they cannot pass each other, and can only reverse route by doing a u-turn at a preplanned location. They are even more constrained in this regard than are trams.
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
Fossicker
I'm not sure they can manage to get 15hours flight though.Originally Posted by ramblingboy42
Fossicker
A good comparison of where we are with technology is energy density per kg: diesel has a possible 11.6kWh per kg of fuel. Engine conversion efficiency is around 20% so gives 2.32kWh energy. The latest Tesla batteries pack 0.25kWh per kg of battery which is 10times less not considering losses. You need ten times kg battery to equal energy available from fuel no matter where we are with technology now.
Swaggie
Subscriber
im glad you posted. i've been thinking all day about how to compare the two. and you've done it in one paragraph!
Current Cars:
2013 E3 Maloo, 350kw
2008 RRS, TDV8
1995 VS Clubsport
Previous Cars:
2008 ML63, V8
2002 VY SS Ute, 300kw
2002 Disco 2, LS1 conversion
Swaggie
yes Craig I can't help but agree .....but nearly all projects these days are done to scale first.
Also, as soon as we can have pilotless aeroplanes we can get rid of tons of monitoring eqpt and systems that the pilots use to fly them.
Good example of that is drones, huge endurance and payloads for relatively small airframes.
It'll happen but we won't be alive to see it.
AT REST
Sounds like an excuse to upgrade trolley buses with a battery capable of keeping them going for 1/2 an hour. That way they can deviate off the main route if needed.
AT REST
Don't forget though that electric motors are far lighter than equivalent combustion engines, while this only accounts for some of the difference it is a step forward. if nothing else first generation electric planes could use battery power as a take off boost allowing the main engines to be smaller and lighter for a given payload. Concentrated air pollution is reduced at airports too as these are usually right next to cities.
http://company.airbus.com/responsibi...-aircraft.html
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