Tuesday, April 17, 2018

Re: [Electric Boats] Re: EPA commuication regarding 15% Ethanol use

 

Uses 4-7 times the fossil fuels as a cabin cruiser with a huge diesel/gas internal combustion engine?
Can you explain the physics of that? : )

You need to back up what you say with sources, and clarify what you are talking about. You are just spreading oil and gas propaganda.

There is embodied energy in batteries and solar panels, but they make that energy back in their lifetime, and batteries are recyclable.

We need to slow down and down size. With 7.6 billion humans, we all can not have a 2 gallon/mile mega-yacht.

We should take some things seriously, like destroying our planet. We only have one, so it is kind of serious if we destroy this one.
The future is going to be awesome. Clean air, quiet electric self driving cars, planes and boats. That sounds pretty cool to me.



On Tue, Apr 17, 2018 at 7:41 AM, king_of_neworleans <no_reply@yahoogroups.com> wrote:
 

Maybe assuming absolute worse case scenario such as power generated by coal fired plants, burning soft coal, I dont know. I do know that if you are looking at shore charging from hydro or nuclear, obviously electric is pretty clean. Large diesel ICE electric generating plants are much cleaner and more efficient than small diesels per kw. Then there is economy of scale. A straight diesel-electric propulsion system of course is not typically very efficient, but a parallel hybrid can be. Solar panels, if you are able to use them for a reasonable projected lifespan, are pretty clean. So just intuitively, without any data at hand, I have to question your figures. No doubt there are others who are probably thinking the same thing.

Much can be done to make electric drives and charging/storage systems more efficient, too. For instance, keeping battery charge in the bulk charging range most of the time and only going into absorption and float charging periodically, equalizing every few months instead of monthly or never at all. Keeping the bottom and prop clean. Proper selection of prop and reduction.



---In electricboats@yahoogroups.com, <dhennis@...> wrote :

I like electric too.  I even have several.  So, I know this is going to come as a surprise to you and open a really big can of worms, but, ... Did you know that with our technology, AND taking into account all the manufacturing processes required, the "electric carbon and pollution foot print" is conservatively between 4 and 7 times more dirty and polluting than the basic use of fossil fuels?  There have been several studies by independent labs to prove it.   I have read one that claimed only 3 times more polluting, and one from a socialist think-tank that claimed 12 times, but I think that most of them were in the 4-7 range.  Take it for what its worth, everything has its place and in moderation.Enjoy your boat while you have it.  Have fun and don't take anything too seriously.  Cheers,



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