[extropy-chat] FWD [PvT] Re: Anti-hurricane engineering

[Mike Lorrey]

--- Hara Ra <harara at sbcglobal.net> wrote:

> I was musing about the problem today:
> 
> 1) If the air bubbles are put into the water, I have totally ignored
> the 
> fact that 100 meters of water is about 10 atm pressure, and when air
> is 
> compressed this much it becomes hot (think diesel engines compression
> 
> ratio). The energy to compress the air is not avoidable, and once the
> air 
> enters the water there is no means to keep the air hot.   I don't
> want to 
> to the math, but compressing 1 M^3 of air to 100atm (10 liters) takes
> 
> vastly more energy than lifting 1 M^3 of water by 1M.

You are forgetting something: 

a) heat will be transferred to water by the bubbles, which will assist
in its rising.
b) as the water rises, it will decompress, which will cool the water
back down.

=====
Mike Lorrey
Chairman, Free Town Land Development
"Necessity is the plea for every infringement of human freedom.
It is the argument of tyrants; it is the creed of slaves."
                                         -William Pitt (1759-1806) 
Blog: http://www.xanga.com/home.aspx?user=Sadomikeyism


		
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