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Old 12-08-2017, 10:10 PM
jay_bob's Avatar
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Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,942
1.5 MW Cummins Diesel Genset

This is from a second hand used equipment dealer but shows the engine generator clearly.

These are what my customers use to keep up their data centers...this is actually a small one - most of my customers are using 2.0 or 2.5 MW units. The bigger ones look exactly the same except they’re larger, and 16 cylinder instead of 12.

You can hear the turbos (yes plural turbos) scream as he applies load...and a lovely cloud of black smoke to make Dieselmeken jealous.

This one has a burn rate of about 100 gal/hr under full load. The 2.0s about 125 gal/hr and the 2.5s about 150 gal/hr.

Note the 3 fuel filters on the left side of the engine. Yes the fuel is red because they are burning dyed diesel. There are 3 filters so that you can change one at a time while the engine is running. Same with the oil filters on the other side.

Behind the generator the big gray box is a load bank. It’s a giant toaster with a big fan in the bottom. This is how you load up the generator to test it. You can see they have temporarily cabled it up to the output breaker with cables. This is quite normal practice when commissioning the generator.

Normally these are either installed in a room in the building, or more commonly in a modular enclosure beside the building. In this case, the fuel tank sits underneath (so the generator is about 4 ft off the ground) and it has metal walls and a roof to protect it from the weather. The ends have lovers to draw combustion and cooling air in one end and expel hot air from the radiator out the other end.

https://youtu.be/wAKXxJ2ZWks

I design the power switchgear that accepts the power from these generators and sends it to the critical power loads. We have automatic switchover that chooses utility or generator power. Simple systems use one utility feed and one generator and toggle back and forth. More complex systems have multiple generators operating in parallel with each other for extra capacity and redundancy, and sometimes even parallel with the utility.

Another one, 2 MW Cat:
https://youtu.be/iLqlser0dL0
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