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Showing posts from August, 2015

17k and counting plus an outlook on my energy usage

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The more I drive my BEV the more I realize the pervasive and noxious nature of ICE cars. They now seem inferior in every way. A BEV is about 3-5 times more energy efficient per unit energy used to move its body around. To testify to that here's a look at my energy consumption thanks to ChargePoint. We can safely add 100 % as I am also getting my energy from other sources i.e home, blink and the free charging in Santa Monica, so 3 MWh seems a fair bet. That means 3,000,000 X 3600 = 10.8 Billion Watts (or Joules). This as I crossed 17k since March so in about 5 months. That is about 5.8-6 kWh per mile.  Gasoline has about 44.4 MJ/Kg. So I consumed 10.8e9 / 44.4e6 = 243 kg of equivalent gasoline. That would be 536 lb of gasoline or 90 galons. But there is a problem: only 15% of that energy in gasoline above gets actually converted to useful work in an ICE engine subjected to the Carnot cycle, whereas BEV use more than 90% of the energy in the battery quite effectively. Let's assum