P&ID - Electrical Inputs 4

[NickParker]

I'm an Electrical engineer who wants to prepare Electrical Load list to estimate the power requirements for an FPSO. I'm told that I need to take a look at P&ID's for the Electrical requirements.

Which document would show all the electrically operated equipment's in a single document. Right now I have P&ID's of modules in a FPSO.

Can anyone point me to the easiest way to find this.

 

[bimr]

Refer to the link:

Link

 

[LittleInch]

You might find a document called a Mechanical or Major Equipment list, but otherwise the key items are often listed on the P & IDs.

Basically the document you're producing is the one I would go to to find all the electrical equipment.....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[MJCronin]

The incompetent MBA managers in your organization should have introduced you to the concept of "Equipment List" or electrical load list

These MBAs should have never steered you to a set of PIDs for your electrical loads ... They have no Process Experience

Nick, this seems to be your first Process plant rodeo...

Pumps, Compressors and other important electrical equipment should have been sized by an experienced Mechanical Engineer who performed preliminary sizing and went out for budgetary quotes. This information would go into an Plant Equipment List. Actual estimated equipment hp ratings should be noted on this list.

Simply because your process pump requires 35 hp to perform its function might mean a 50 hp motor is eventually purchased and installed.

Some equipment will require electrical VFDs .... This important and expensive selection is largely by the client which should have been worked out by your confused MBA boss and the client. This should be noted on the Plant Equipment List.

Some equipment (usually pumps) will be designed as "installed spares" or "spared service" ...This is a configuration where a 100% backup is installed alongside the process unit, ready at a moment's notice to take up the service. Bothe pumps will not operate at the same time. This expensive feature greatly facilitates maintenance, but must be known and understood by the electrical design engineer.





MJCronin
Sr. Process Engineer

 

[LittleInch]

MJC - Did an MBA run off with your wife or something??

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[MJCronin]

Some time ago, when I was sitting in a rocking chair in the front porch of the Community retirement home, where I live ...

I was slowly rocking back and forth enjoying the sunshine and sadly contemplating the decline of my health, memory and mind.

Suddenly, a large group of wild-eyed and rabid MBAs came roaring down the street in a pack. They were yelling, laughing and screaming something about "quarterly bonuses" and "there is no I in TEAM" .... they were threatening and kicking small children in the neighborhood.

I froze as the largest and most hideous wolf-like MBA broke through the gate and approached me and the other feeble senior citizens.

He had a large gaudy gold chain around his neck and a huge medal with the word "WHARTON" displayed ...

He then licked his long and sharp yellow teeth and bit my leg in several places... over and over and over again

Laughing, he returned to the pack saying "ALL OF YOU ENGINEERING BASTARDS WILL GET WHAT THEY DESERVE !!"

My leg wounds were deep but are slowly healing .... But this is a true story ..... honest ...

MJCronin
Sr. Process Engineer

 

[LittleInch]

Ha - I had to go look up the reference as it didn't mean anything to me

https://mba.wharton.upenn.edu/

But in your original answer, the OP is being asked to produce the load list..... So he's looking for the thing he is writing.

But you get a star for that story.





Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[EdStainless]

At least that story has more voracity than what most MBAs spout.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[georgeverghese]

Its a good idea to look at both process drawings and the equipment list - these multidisciplinary docs often have discrepancies that get missed out during interdisciplinary checks. HVAC system motors and things like pressurisation fans for hazardous area location enclosures wont be shown on process drawings. Often, small motors in vendor packages wont show up on the main plant process drawings till late in the design (lube oil pumps, chemical injection pumps etc) or not all, depending on when the client decides to pull the plug on the level of detail in the process drawings, so look out for info in the vendor package drawings also. Process drawings often state only max absorbed power and not rated power for main process and process utility systems related electrical drives. Its a lot more tricky to work out max (total) plant electrical loads.