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Cables and ohms
Message
 
To
15/10/2002 09:44:13
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivia
General information
Forum:
Windows
Category:
Computing in general
Title:
Miscellaneous
Thread ID:
00710654
Message ID:
00711521
Views:
16
>>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.

>
>> Therefore, for a 100 MW power plant to supply 100MW to the consumer it must dissipate 100 MW of heat to the environment and consume a total of 200 MW of energy from coal, etc... This does not consider line losses, which will subtract from the 100MW pumped out to the consumer. Most transmission lines are around 94-96% efficient, so only about 94-96 MW makes it to the 110v outlet in the consumer's home, enough for about 19,000 homes if they have 5KVA transformers. Most of this energy is generated by combusting fossil fuels. Fossil fuels (oil, coal, shale) turn out to be our major resource for plastics and medicines. This is why we need to switch to a Hyrdogen economy ASAP!
>
>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.
JLK
Nebraska Dept of Revenue
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