That sounds exactly right. My truck does a litle over 1/2 kWh per mile at minimum freeway speed due to Wider than standard tires, thick oil and most importantly, the energy-robbing Automatic transmission. Similar light trucks that I have seen and driven had Lower kWh per mile numbers (closer to 400Wh/mi) while a continuous 55 MPH Could be maintained with only 15kW of power, which gives you an absolute Minimum energy requirement of 15/55 = 272 Wh/mi but this is not taking realistic Driving conditions into account, so I will stick with a more realistic worst case Of 1/2 kWh per mile for a light truck that in ICE version achieves 20-25 MPG. Since your 40 ton truck achieves 5-6 times higher consumption (4.2 MPG) the Expected electric energy consumption can be expected to be 2.5 - 3 kWh per mile. For a 200 mile range, you are looking at between 500 and 600 kWh of batteries, Exactly like you calculated. Regards, Cor.
-----Original Message----- From: EV [mailto:[email protected]] On Behalf Of Larry Gales via EV Sent: Tuesday, November 03, 2015 3:14 PM To: Electric Vehicle Discussion List; SEVA Subject: [EVDL] Battery size for a 40 ton 18 wheel truck with a 200+ milerange I'm trying to determine the battery size for an 18 wheel (40 ton) truck with a 200+ mile range. There is a 20 ton bus (see: http://www.byd.com/na/auto/40feet.html ) with a range of >155 miles and a battery size of 324 kWh. So, for 210 miles that would be about 463 kWh. According to a graph (figure 7) in: http://www.goodyeartrucktires.com/pdf/resources/service-manual/Retread_S 9_V.pdf the MPG declines from 5 to about 4.2 when the weight goes from 20 tons to 40 tons, so I would estimate that the truck would need about a 550 kWh battery. Does that sound reasonable, or am I missing something? Thanks, -- Larry Gales -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20151103/1a33 0645/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
