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Never ever encountered and more over it is very difficult to check the problem without having the Hysys file. If you could share may be we could have a look. Regards, John

ESD MOS is a built-in switch provided in the DCS to enable maintenance of trip transmitters/system so as to avoid inadvertent trip of the plant/unit. Normally the overridden trips gets back to normal after a period of time say 8 hours. Regards, John

good observation. seems like it is not strictly followed everywhere. here too in my company frame-6 GE machine is have an actuated valve (of isolation and maintenance) located outside the enclosure of the turbine, but it is not having a local manual mechanical device for tripping.

make sure that all the valves (whether control, on-off, relief, isolation) whatsoever the size is should be tagged. apart from this i do not think there is LOTO things you need to include in your P&ID. LOTO procedure is usually a standard safety procedure available with all companies and also...

just two points: 1)it is better to use 2 rows only as this not only enables ample air to circulate it also saves a lot in maintenance, as it may required heavier cranes to reach on top near to the middle row. 2) no. of cells can be optimized by using more blades per fan and hence the total...

dear all, we are also facing almost similar problems. we (in middle east) recently commissioned 2 nos. of Frame-6 GE machines 10 months ago and we have started getting HIGH FILTER DP alarms which has forced several times to reduce the load. on investigation we found that apart from the base...

Exacly as said by TD2K, this usually happens during high humid climates. However changing to fresh water is not a feasible solution as the cost of production of fresh/desalinated water is very high and proximity of sea is an added advantage. The vendor of the cooling tower has guaranteed a drift...

we have recently commissioned a seawater cooling tower in the middle east region with a heat duty of 1305MW. This is achieved through a circulation of 120,800t/h of ciruculatiion of seawater. However we have noticed that during high humidity seasons, there is high salt deposit on and around the...