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#22 |
Read? I only know how to write.
Join Date: Jan 2001
Posts: 11,933
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The discussion is asking how fungible is electricity. UT has been citing satellite photographs of lines I just cannot see in these photos. For example, provided is the switching yard for Limerick. Limerick power plant in upper half. Switch yard for transmission lines in lower right:
Limerick How many power lines enter this switch yard? Well I don't see all the power lines. But I do see structures that terminate those lines. I count at least nine lines. Four to the backbone to the east. Two from the nuclear power plant. One to Cromby. Two from the backbone from the west. Can anyone actually see all those lines? I can't even when zeroing in on switch yard at best resolution, how does one see transmission lines? Limerick switch yard Look closely at this picture of where two Limerick lines and one Cromby line cross the Perkiomen Creek: Perkiomen Crossing An uppermost line (appears as three lines) from Limerick crosses over a north/south dam. The next line down crosses over the lower edge of that same dam - line barely visible. The southern lines that appear as two wires is the Cromby line. The Cromby line passes through and connects to a substation. This is best visibility possible. How from these crude pictures can anyone say which lines maintain which direction? One of the two Limerick transmisson lines is barely visible. Now we refer to the topographical map of that same region. Apparently only one Limerick line (the less visible one) and one Cromby line existed back then (1983). What I remember of N Wales is that three 230Kv lines enter. The backbone lines from Limerick are 500 Kv. One enters N Wales from the north to connect eastward; two 230 Kv lines enter from the south to connect southward and westward. Only the wire to the SW connects to Cromby - whose outgoing lines are also 230 Kv. IOW 500 Kv lines from Limerick do not connect to N Wales. Good luck seeing both lines entering from the south. None of the three would be 500 KV lines that would be the PJM backbone and that connect from Limerick. But again, how could one tell from best detail arial photo of N Wales switch yard: N Wales switch yard So how fungible is electricity when Limerick Nuclear power connects mostly to backbone lines that go elsewhere. Meanwhile, Cromby, a fossil fuel plant, provides direct connections to substations on the Perkiomen Creek, in N Wales, and on substations near the Cellar along the Schuykill River. Substations around the Cellar have direct connections to Cromby via 230 Kv lines - not to Limerick via 500 Kv lines. Even though the grid is only 20% nuclear, it appears that The Cellar gets most all its electricity from a fossil fuel (oil, coal, and natural gas) plant. I don't see how UT could count lines nor say where those lines connect from satellite photos. The best photos I can find don't even show all the lines nor can tell which type of transmission lines they are. But we know from those satellite photos that only three lines terminate in N Wales - which would be one from Cromby and none from Limerick. Even the number of lines UT says are going to N Wales does not agree with satellite photos of the N Wales substation. I don't see where his claims or his numbers are justified by any ariel photos. |
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