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Cables and ohms
Message
 
To
15/10/2002 18:11:14
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivia
General information
Forum:
Windows
Category:
Computing in general
Title:
Miscellaneous
Thread ID:
00710654
Message ID:
00711669
Views:
7
>>>>Another little known or understood fact about the transmission of power is that for maximum transfer of power the impedence of the load must match the impedence of the power source.
>>>
>>>Impedance is measured in Ohms; your later comments refer to MW (power units).
>>
>>Of course, but maximum power (MW) can only be transfered IF the internal impedance of the generator (source) equals the internal impedence of the load (sink). In AC circuts the impedence is equal to the square root of the sum of the squares of the inductive reactance, capacitative reactance, and the ohmic resistance. Assuming that both internal impedance reactance cancel only ohmic resistance remains.
>
>OK.
>>>Hydrogen could be used for storage (as in a battery). But let's not forget that the energy has to come from somewhere in the first place. Nuclear energy would be perfectly acceptable, provided the nuclear reactor is far enough from the consumers (say, 150 million kilometers / 93 million miles).
>>>
>>I would not like to see the adoption of nuclear energy, because of the long life of dangerous radioactive waste. Hydrogen has no such problems.
>
>I repeat: nuclear energy represents no serious thread if the reactor is quite far away, for instance, 150 million km. (I was referring to solar energy.) Actually, some threats do exist in the long run (perhaps in a few billion years) - but this can't be avoided anyway.

Oh! Pardon my 'density'. I read the first part of your sentence and not the last, because it triggered my warning flag. :-)

What amazes me is the misconception folks have about the safety of Hydrogen, mostly derived from the Hindenburg disaster. What folks don't realize is that hyrdocarbons are more dangereous because their vapors, being heavier than air, flow along the ground/floor like a river and when they encounter an ignition point a flash-back to the source occurs, causing an explosion. This is how houses blow up when their propane furnaces leak, or when gasoline spills. Hydrogen, on the other hand, rapidly floats up and disperses, and doesn't form a dense 'river'. Experiments with pressure tanks containing Hydrogen and Propane show that when the tanks are hit with a round from a high powered rifle the Propane tank ruptures, the heavy gas spills out and catches fire, spreading fire along the ground as it burns. The Hydrogen tank ruptures and catches fire, but the Hyrdogen fire burns UPWARD, harmlessly, and doesn't flow out.

JLK
Nebraska Dept of Revenue
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