Wednesday, February 17, 2010

Tuesday's Fieldtrip to the TRF Hydroelectric Dam

Just some of the photos. The rest are at Flickr. I'll put the video I took up on Youtube when I get a chance.


Gary P. first showed us the old diesel generator. This same model of generator was used to charge batteries for submarines during WWII.


Here's a side shot of the generator. It still works. And TRF uses it when they need to. But only when it is needed. It's expensive to run.


Inge loves field trips.


This small diesel generator puts out the same power as the big one above, uses less diesel. But it is still expensive. Gary fired this one up for us. It makes a lot of noise.


TRF's third diesel generator. Each of the generators has the same basic parts and does the same basic thing. Alternating Current comes from the large coils. Direct Current is generated by a smaller coil off to the right by Gary's feet.


The dam has two water turbines. This one and the one behind it.


Gary explains the way the water falls through the fins on the turbine below the generator coils, the axel connected to the coils and how they regulate water flow.


Here Gary is showing us how the governor works to keep the turbine at the proper speed for 60 cycles per second.


We're outside looking at the substation that takes transmission of electricity from North Dakota, converts the ultra high voltage into something usable for the city. The electricity generated by the dam is put through this substation to lower the amount TRF has to buy from ND. Should the lines from ND fail the dam and the diesel generators are the city's supply. And if I remember correctly what he said, the dam and generators could only supply about a quarter of the city's need.


Outside looking at the area where the water falls into the fins of the turbine.

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