OT question for JD G

David G · Dec 20, 2015

My customer is reducing the NG purge pressure on the compressors to reduce cranking torque.

What pressure did you put on the compressors during cranking?

greg oliver · Dec 20, 2015

David, do you guy's have any compressor station video's of them working? Near my bosses house is a planned compressor station for a new pipeline and the local town folk's are anti pipeline and say the compressor station is going to be offensive. We are for it even though no direct economic impact. The pipeline route is still being surveyed and where the station is going on Chamberlain Hill road in Delaware County New York and the gas is coming from Pennsylvania. A lot of farmers were hoping for drilling in our area and this pipeline has already helped a few farmers even though no construction has started. Thank's, Greg

David G · Dec 20, 2015

I do not have any pictures, but will take one next time.

Most of the new compressor stations are at least a mile outside town, it is less offensive than a substation in my opinion. I would assume they are going to put in a turbine, those are quite small and will be housed in a nice steel building. The only thing sticking up would be the exhaust stack. I would not want to live RIGHT next to one and listen to the engines, but 1/2 mile away and you will never know it is there. The older engines had large cylinders and low RPM, they would make quite a bit more noise and are harder to muffle.

greg oliver · Dec 20, 2015

David, thanks for the info, back in 1980's a proposed 345 KV power line ended up going thru half our 250 acre farm. I know now when the surveyor's are done construction isn't to far behind. We ended up working with them after a feeble attempt to stop it. The power line and the proposed pipe line aren't to far from each other were the compressor station will be. Not very many people live near there and the town of Franklin is miles away. Greg

David G · Dec 20, 2015

They are EXTREMELY safe, do not worry about that.

greg oliver · Dec 20, 2015

Dave, I just looked up Marcy South power line on Wikipedia had to laugh it say's there was a lot of opposition. Our dairy farm was 6 miles from the Frasier Sub station. My friend Roger Boles still farms the land around the sub station and his cows still don't glow in the dark!

David G · Dec 20, 2015

I think there are emissions from the high voltage AC lines, the future is really DC transmission, South America is already doing it. The losses on DC are a lot less and there is not field emitted. The US is usually behind the times when it comes to the electrical transmission business.

greg oliver · Dec 20, 2015

I think that with the right minds working together we can become energy dependent. My father was pro nuclear as well as my uncle Harry Preston who worked at Hannaford in Washington state for a long time. We have come a long way in 80 years and looking back we had 100 years of steam and over 100 for petroleum so what's next?

David G · Dec 20, 2015

My father in law is retired nuclear engineering professor, he gets frustrated every day that nuclear power is not expanded.

showcrop · Dec 20, 2015

(quoted from post at 18:45:22 12/20/15) I think there are emissions from the high voltage AC lines, the future is really DC transmission, South America is already doing it. The losses on DC are a lot less and there is not field emitted. The US is usually behind the times when it comes to the electrical transmission business.

Ya Think??? Any transmission. pretty much any business.

Andy Martin · Dec 20, 2015

Interesting comment. When I worked in Europe in the '90's, the Brits always had a chip on their shoulder thinking Americans thought we were always 5 years ahead. I went over there thinking I'd learn something new. Turns out they had some things we didn't (like single wide tires on semi's we are starting to see here twenty years later) but pretty much things are just different, not better or worse. DC is coming here but it will only be new services, like from wind farms. It's pretty hard to replace existing technology.

John Deere D · Dec 21, 2015

After a START sequence was initiated, at some point before the Prime Mover (V-16 Clark, V-12 KVS I/R,KVH) was turning over/cranking on starting air, with ALL NG INLET VALVES CLOSED and all NG DISCHARGE VALVES CLOSED as well as the 6">8" RECYCLE line is OPEN (Line connecting INLET HEADER to DISCHARGE HEARDER)50>100 LBS of Natural gas was purged into the compressors. Then the main unit would start to crank.
On the V-16 CLARKS there is an air VALVE for each POWER CYLINDER (16). Not the VALVE in the POWER CYLINDER HEAD but the VALVES inside the housing that sits on top of the TWIN CAMSHAFTS. If the setting between the end of the VALVE stem and the LOBES on the CAMSHAFTS are not correct (to much gap) there shall be a lack of air VOLUME admitted to the START VALVES in the Power Cylinder Heads. The valves I'm referring to, are located under a 1 1/2" or possibly a 2" Pipe Plug on the STARTING AIR HEADER with a 1" STEEL line/Tubing connecting starting air to the START VALVE in the head. We required all the Air volume available to start these units.

David G · Dec 21, 2015

Looks like 50 - 100 pounds from your post, I think that was missed in the automation step because they were doing it much higher and are going back to that.

OT question for JD G

David G

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greg oliver

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David G

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greg oliver

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David G

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greg oliver

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David G

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greg oliver

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David G

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showcrop

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Andy Martin

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John Deere D

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David G

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