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Hello Everyone,
I am new on GE gas turbine. I understand GE codes, their P&IDs, every systems. But I am much confused on "Gas fuel system". Here I am uploading GE gas fuel system P&ID and giving the link:
http://www.mediafire.com/view/1g880ejf8ojdils/Gas_Fuel_P&ID.pdf
My curiosities are on :
1. In Safety shutoff valve (SSOV) , VS4-4 , 2 vent lines are shown on P&ID, one is from valve upper portion and another is from bottom portion (Of course I marked at uploaded P&ID with red arrow). My question is, why we need these vent lines, If we ignore those, what problem can happen?
2. In same page, in the D5, PM1, PM4 assembly, 3 pressure transmitters (PDT 96GN-1, 96GN-2, 96GN-3) are in used. (Of course I marked at uploaded P&ID with red arrow). My curiosity is, why these sensors are in used? actually which differential pressure are they measuring ? Any control is given on the based on their measurement?
3. In the Strainer, a differential pressure switch is used, (PDS 63FGD-1). I already noticed on GE "DEVICE SUMMERY" , the increasing pressure is 15 PSID. (Of course I marked at uploaded P&ID with red arrow). My question is is differential pressure is higher than 15 PSI, what will happen? GT will Trip? or anything will happen?
I know, in this group, there are some intelligent people about "Instrumentation and Control" and also "Mechanical Engineer". As I am a operations engineer, I expect better answer from them. Of course I will be grateful to them.
I of course already read the GE document on Gas fuel system. About above topics, I could not get satisfied answers from that document. Thats why, I have asked those questions in this group.
Have a nice day, Thank you all.
I am new on GE gas turbine. I understand GE codes, their P&IDs, every systems. But I am much confused on "Gas fuel system". Here I am uploading GE gas fuel system P&ID and giving the link:
http://www.mediafire.com/view/1g880ejf8ojdils/Gas_Fuel_P&ID.pdf
My curiosities are on :
1. In Safety shutoff valve (SSOV) , VS4-4 , 2 vent lines are shown on P&ID, one is from valve upper portion and another is from bottom portion (Of course I marked at uploaded P&ID with red arrow). My question is, why we need these vent lines, If we ignore those, what problem can happen?
2. In same page, in the D5, PM1, PM4 assembly, 3 pressure transmitters (PDT 96GN-1, 96GN-2, 96GN-3) are in used. (Of course I marked at uploaded P&ID with red arrow). My curiosity is, why these sensors are in used? actually which differential pressure are they measuring ? Any control is given on the based on their measurement?
3. In the Strainer, a differential pressure switch is used, (PDS 63FGD-1). I already noticed on GE "DEVICE SUMMERY" , the increasing pressure is 15 PSID. (Of course I marked at uploaded P&ID with red arrow). My question is is differential pressure is higher than 15 PSI, what will happen? GT will Trip? or anything will happen?
I know, in this group, there are some intelligent people about "Instrumentation and Control" and also "Mechanical Engineer". As I am a operations engineer, I expect better answer from them. Of course I will be grateful to them.
I of course already read the GE document on Gas fuel system. About above topics, I could not get satisfied answers from that document. Thats why, I have asked those questions in this group.
Have a nice day, Thank you all.