On Tue, Mar 24, 2015 at 7:09 PM, Ben Goren <[email protected]> wrote:
> On Mar 24, 2015, at 3:36 PM, Michael Ross via EV <[email protected]> > wrote: > > > So which is better? 90% efficient > > for EVs versus 20% efficient for ICE. > > ...and that assumes that EVs are forever stuck with getting their > electricity from coal-fired plants. I'd bet a suitable beverage that coal > represents the minority of electricity going into EVs today, due in no > small part to the early adopters being overwhelmingly likely to have solar > panels on their rooftops. > The efficiency numbers I gave are not inclusive of the source efficiency. They are for the vehicles only. So it has nothing to do with the coal fired plants. The source efficiency needs to be part of the discussion. Electric power transmission is pretty efficient, and coal plants are also not so bad. Much better than ICE + pumped and refined petroleum. The next wave of EV adoption will not be as likely to have solar PV unless the various the states and fed do more subsidies. PV is not equal in cost to any other power source without subsidies. Without the 65% I goet back I would not have been able to justify it on an economic basis. http://www.eia.gov/energyexplained/index.cfm?page=coal_reserves "Based on U.S. coal production for 2012, the U.S. estimated recoverable coal reserves represent enough coal to last 253 years." http://www.eia.gov/tools/faqs/faq.cfm?id=427&t=3 What is U.S. electricity generation by energy source? In 2013, the United States generated about 4,058 billion kilowatthours of electricity. About 67% of the electricity generated was from fossil fuel (coal, natural gas, and petroleum), with 39% attributed from coal. In 2013, energy sources and percent share of total electricity generation were - Coal 39% - Natural Gas 27% - Nuclear 19% - Hydropower 7% - Other Renewable 6% - Biomass 1.48% - Geothermal 0.41% - Solar 0.23% - Wind 4.13% - Petroleum 1% - Other Gases < 1% The way is not clear yet. -- To invent, you need a good imagination and a pile of junk. Thomas A. Edison <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 585-6737 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150324/9630baf2/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
