[Novalug] Wireless power transfer achieved at 5-meter distance -- ScienceDaily

pereira ninorpereira@gmail.com
Mon Apr 21 20:57:41 EDT 2014


Of course the ultimate problem to our energy needs, and many other 
things besides,
is to have fewer people (as discussed on this list earlier, over the 
long time, i.e., 1000 years, say).

IMHO all that power beaming is fantasy, too expensive, and full of 
hidden flaws don't come
out clearly in superficial analyses. But, those become obvious once you 
start building and
exercising a prototype.

It would be interesting to see how long you have to be up there 
gathering solar energy,
to gather all the energy you need to put the equipment up there in the 
first place.
I won't do that computation.

Nino

On 04/21/2014 07:48 PM, Charles R. Head wrote:
> *Bonnie,*
>
> You are correct.  The power from a power sat would warm the earth.  
> However, think about this:
>
>  1. The cross sectional area of the earth is ~~128,000,000 square km.
>  2. If a power sat was 100 kmon a side(10,000 square km) and was a
>     perfect mirror reflecting all sunlight hitting it to the earth, it
>     would increase the amount of sunlight hitting the earth by a
>     factor of 1.00078.  The amount of power beamed in can't add more
>     heat than that.
>
> That doesn't seem like a lot of additional heat.  I just pulled 100 KM 
> on a side out of the air because it seemed absurdly huge.  The design 
> studies I found after a quick look on the web weren't a hundredth of 
> that size. However, they would need a bunch of power sats to put a 
> dent in our power needs.
>
> I suppose even that small amount of extra heat could accumulate to 
> something to worry about over a long period of time.  Then your 
> argument about less heat trapping because of less CO2 in the 
> atmosphere should kick in.
>
> *Charlie Head*
>
> (BTW, generally when I did design studies before retiring, I'd screw 
> up the arithmetic.  You might want to check my math.)*
> *
>
> ******************************************
> On 4/21/2014 6:25 PM, Bonnie Dalzell wrote:
>
>> It would seem to me that beaming power  in from satellite collectors - not
>> matter how efficient could still increase the overall temperature of the
>> earth because in effect it is increasing the surface area that energy
>> is being collected over.
>>
>> 2nd law of thermodynamics
>>
>> send in power (even if it does not heat the atmosphere when coming
>> through the atmosphere). use it to move vehicles.
>>
>> energy is lost from moving vehicles by friction against air, ground, brake
>> linings etc. this energy becomes heat because it moves molecules around.
>>
>> energy is used to heat up houses in the winter
>>
>> etc
>>
>> when I use a ground coupled heat pump to heat my house the heat is still
>> extracted from a closed system (the earth) and temporarily
>> redistributed to the house. but is electricity generated by a
>> solar cell array in orbit is used to heat my house we are adding to the
>> total heat the earth absorbs from the sun.
>>
>> now it could be that the lowered CO2 and methane in the atmosphere that
>> could come about from using broadcast power from orbiting solar
>> collectors could enable the bi product heat to radiate away from the earth
>> and we would be better off than burning petro chemicals but I see a
>> potential for an interesting article in Analog or Scientific American
>> on this topic.
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>                          Bonnie Dalzell, MA
>> mail:PO box 9767 Baldwin, MD, USA 21013  |EMAIL:bdalzell@qis.net
>> shipping address:5100 Hydes Rd 21082 (Hydes Post Office closed Jan 2012)
>> Freelance anatomist, vertebrate paleontologist, writer, illustrator, dog
>> breeder, computer nerd & iconoclast... Borzoi info atwww.borzois.com.
>> HOMEwww.batw.net     ART bdalzellart.batw.net  BUSINESSwww.boardingatwedge.com
>>
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