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Deleted member 2439
Guest
Hi all,
I stumbled across this on YouTube yesterday. The title doesn’t really do it justice, as it appears to be about towing with an EV. However, that is just one aspect which is addressed In addition to many others. I watched it as I’ve seen others by the same guy & was really impressed at the level of research & analysis which he has done. It’s really an analysis into the overall energy efficiency of ICE and EVs. Although of US origin, the fundamentals are just as valid over here.
My big take-alway from watching this was how energy rich petrol & diesel are. Roughly a gallon of the stuff holds as much energy as a full ZS EV battery pack! So the ICE drawback is the low efficiency of the engines which drink the stuff, and the EV drawback is the size/weight of the battery needed to do anything useful. His companions are based on the Ford Explorer, a full sized SUV which will only do 20 mpg, and the Tesla model X, with a 100kWh battery pack and is quite heavy. The comparisons are valid and hold water over here as well.
A couple of minor issues to point out. Firstly, his gallon measure is a US gallon, which is only 3.7 litres, I think, whereas an imperial gallon is 4.5. Also, his EV fuel efficiency is quoted in Wh per mile, whereas we are used to miles per kWh. These are essentially the same, with one just being the reciprocal of the other. So a car doing 250 Wh per mile, is actually doing 4 miles per kWh.
The comparisons all made me think and a few things became clearer in my mind. So, all in all ten out of ten for this, it’s an excellent engineering analysis - and you may be able to see why I get so fussy about kW & kWh being used properly.
Enjoy ?
I stumbled across this on YouTube yesterday. The title doesn’t really do it justice, as it appears to be about towing with an EV. However, that is just one aspect which is addressed In addition to many others. I watched it as I’ve seen others by the same guy & was really impressed at the level of research & analysis which he has done. It’s really an analysis into the overall energy efficiency of ICE and EVs. Although of US origin, the fundamentals are just as valid over here.
My big take-alway from watching this was how energy rich petrol & diesel are. Roughly a gallon of the stuff holds as much energy as a full ZS EV battery pack! So the ICE drawback is the low efficiency of the engines which drink the stuff, and the EV drawback is the size/weight of the battery needed to do anything useful. His companions are based on the Ford Explorer, a full sized SUV which will only do 20 mpg, and the Tesla model X, with a 100kWh battery pack and is quite heavy. The comparisons are valid and hold water over here as well.
A couple of minor issues to point out. Firstly, his gallon measure is a US gallon, which is only 3.7 litres, I think, whereas an imperial gallon is 4.5. Also, his EV fuel efficiency is quoted in Wh per mile, whereas we are used to miles per kWh. These are essentially the same, with one just being the reciprocal of the other. So a car doing 250 Wh per mile, is actually doing 4 miles per kWh.
The comparisons all made me think and a few things became clearer in my mind. So, all in all ten out of ten for this, it’s an excellent engineering analysis - and you may be able to see why I get so fussy about kW & kWh being used properly.
Enjoy ?
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