To be clear, the drawing would still be called a plot plan, however, the document/drawing number would be something in the form of xxx-PP-xxx so that someone could intuitively know the drawing is a plot plan if they are familiar with the numbering system.
I used to have a list of acronyms for drawing types to be used when numbering drawings. I can't find the list. A few I remember are listed below. Does anyone have a longer list or something similar?
Drawing Codes
GA General Arrangement
ISO Piping Isometric
PFD Process Flow Diagram
PID Piping...
Most likely 13-14,000 GPM when we were running it before based on amp draw.
A little side note, operations attempted to do a test and force as much water through it as they could. They then started a second pump with no other chillers online and blew out the division plate. It bent a 1" thick...
Found the problem, an incorrectly ranged flowmeter based on logic changes during the annual (set to 15,000 gpm rather than 25,000). We ended up using an ultrasonic meter on the pipe, ran the unit and saw the discrepancy. Reranged the meter to the correct setting and the unit performs as expected.
No VFD. As stated above, the unit is set-up to meet a chilled water leaving temp demand. Guide vanes will go more open as needed to meet that temp and make tonnage. Chilled water valve typically goes 100% open, condenser water valve typically 36-38%.
One other item we haven't fully...
Controls are set-up to meet chilled water leaving temp. The unit backs off when it gets high amps though. If the amps weren't going high, the unit would continue to load up and the CVs for both condenser water and chilled water would open further.
Suction and discharge pressures are nearly the...
It was converted by Carrier (along with two of our other units) to run 134A about 10-15 years ago. The performance guarantee was 4900 tons. We regularly get 4400-4800 tons from the converted machines. This particular unit was making as much as 4700 before this loss of performance.
Motor checked out good.
We pulled almost 1800 pounds of refrigerant out of the machine and still couldn't make tonnage (limiting on suction pressure). Put about 400 pounds back in to get suction pressure up, but still can't make tonnage (limiting on amps). Starting to suspect I may have an...
I am experiencing an issue with one of the chillers at my facility and am looking for some insight. The unit is a 1974 vintage Carrier 17DA unit. It is nominally 5000 tons (holds 15,000 pounds of R-134A).
We took it down for maintenance and have been experiencing 100+ amps higher draw on the...
You should have a discharge pressure gauge at the discharge of the pump, use it. Check TP-410 for the calculation. It's fairly straight forward.
Here is a calc I did for something similar.
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Depends, GE is starving for business and I'm sure MHPS/P&W would love more orders and with their swiftpacs, they can usually deliver quickly. It would also depend on what the cancellation penalty is with Siemens.
Completely agreed. I question who is handling the engineering. Is it Siemens, the...
If this situation is in fact correct, I would be looking for another OEM. Perhaps this is why Siemens is looking to exit the GT business. As an individual who has worked on several projects that involved gas turbine installations, I can say there is a lot wrong with what you have described. And...
I'd say a leak is faulty maintenance and/or engineering inspection program. You could overfill the tank at any time after the tank goes in service, but the leak will most likely occur after the tank is in service for many years.
Not saying I agree with this philosophy, it's just what I have...
Some states (and SPCC certifying engineers) want both because they argue that the tank could still be overfilled. The double wall protects against leaks and the containment protects against faulty operation.
For all of our SPCC PE stamped plans for new power plants, we had double wall fuel tanks with a containment (dyke). Those requirements may vary based on physical location of the facility.
