🚀 go-pugleaf

Jeff Liebermann wrote:
> On Sat, 17 May 2008 11:43:25 -0700, Joerg
> <notthisjoergsch@removethispacbell.net> wrote:
> 
>> True. But Li-Ion charge cycles are pretty well researched out by now. I 
>> doubt one can ever get to 200k miles with one set. But one can on the 
>> first engine, and then some.
> 
> Not really.  The A123 Systems batteries are HD Nanophosphate
> technology which is allegedly better than conventional Li-Ion and LiPO
> batteries.  Although commonly used in overpriced battery operated
> power tools, there's really not enough field experience to predict
> reliability and lifetime.
> <http://www.a123systems.com/#/technology/power/pchart1/>
> 
> "Thousands and thousands" of charge cycles lifetime:
> <http://www.a123systems.com/#/technology/life/>
> Sounds a bit vague to me.
> 
> Fast Charging:
> <http://www.a123systems.com/#/technology/power/pchart5/>
> 
>> I am not a fan of those. My sister has instant heaters and often you 
>> either get pelted with an arctic shower or boiling water. Ok, that's an 
>> exaggeration but it ain't comfy.
> 
> That's high luxury compared to taking a shower with a rooftop solar
> water heater.  I got introduced to those in the 1970's in Israel.
> Israel has lots of sun, lots of rooftops, and isn't insterested in
> wasting power heating what water it pulls out of the Jordan River.
> Haifa was literally covered with apartment buildings.  The ground
> floor was reserved for businesses.  The rest were apartments which
> were sold, not rented.  Every apartment had its solar water heater on
> the roof (along with multiple TV antennas at the time) which made
> things rather crowded.
> 
> Anyway, when you first turn on the water, you get the somewhat warm
> water that was sitting in the pipes.  About 15 seconds later, you get
> scalded by maximumly hot, near boiling, water directly from the solar
> water heater.  That slowly tapers off in temperature as the rooftop
> heater slowly empties.  I learned to take a shower with one hand on
> the valves.
> 
> I've done the same with flash water heaters.  They do a somewhat
> better job of temperature regulation, but without a ballast tank,
> constant adjustment is required.  Still, it's more energy efficient
> than a tank type water heater.  Sacrifices must be made.
> 

Most of the stuff sold for residential use is so incredibly crude. I 
mean, what would it take to design an automatic mixer between hot and 
cold? It ain't rocket science and has been done before.

[...]

-- 
Regards, Joerg

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