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  1. S

    Rain Cleaning out Gas Turbine Filters

    Well I thank you first for the ton of experience that you have shared with me. Getting back to the issue: a) "Dp increases rapidly if there is no rain" : I guess i need to clarify this. What i meant was when it rains the dust in the atmosphere settles which means the filters don't get dirty...
  2. S

    Rain Cleaning out Gas Turbine Filters

    “there is a ground/ground loop…” will get it checked. “Something odd certainly seems to be happening…” This is what concerns me. We are operating with coal fired boilers in vicinity, there is a huge ash handling facility and a lot of ash ends up in our filters which forms a “nice cake” on the...
  3. S

    Rain Cleaning out Gas Turbine Filters

    a) Humidity Flatline This is normal when it rains/get foggy the humidity hits 100% This is inline with past events. b)Water in sensing lines I thought of that too as HP leg of all the Dp sensors is open to atmosphere. But I found no water in impulse line upon checking. If there was water upon...
  4. S

    Rain Cleaning out Gas Turbine Filters

    I looked at the past events and it is generally the opposite. The Dp increases when the the filters get wet and then comes down as the filters dry out!
  5. S

    Rain Cleaning out Gas Turbine Filters

    Working with SGT-700, i recently observed this strange phenomenon of the GTG Air Filter Dp falling (0.51 to 0.42kPa) after there was slight drizzle. Falling Dp can be caused by either A) HP side falling: Ruled out - 04 Trasnmitters monitoring the Dp showed same behaviour B) LP side Rising...
  6. S

    Absurd Delta P across GTG Air Intake Path

    I am working with SGT 700. I came across a peculiar thing wkile looking at the HMI. The Dp across filter set is 0.55kPa, further the Dp across the Compressor inlet plenum (used to calculate air mass flow) is 9.3kPa and finally at compressor inlet the ABSOLUTE Pressure is 95kPa. Calculating...
  7. S

    Design of Gas Turbine Air Filters

    Inner: Length ~550mm Outer: Length ~870mm
  8. S

    Design of Gas Turbine Air Filters

    I am working with SGT 700. The air intake has two stages of filters, the jet pulse canister filters and the HEPA stage. The jet pulse canister filter is a two piece module. I wonder why couldn't they be use a single piece canister? The air flow is from right to left <-------
  9. S

    How do we change the power of an electric generator without changing the frequency?

    This was all from experience! Maybe someone else will add in to this thread...
  10. S

    Effect of valve position on parallel Pipeline

    It is a combined cycle, with supplimentary firing. Yes we have duct burners.
  11. S

    Effect of valve position on parallel Pipeline

    We have an HRSG as a part of GTG-HRSG package. It has two burner stages. The gas fed to it comes in at fixed Temperature and pressure. It then bifurcates for each stage. Each stage pipeline has same Control Valves, Flowmeters and other instrument fittings. The gas to first stage has to be...
  12. S

    How do we change the power of an electric generator without changing the frequency?

    Following Points need to be looked at: 1. "to increase that power we would need to increase the rotation of the gas turbine" This is true only when you are transmitting mechanical power. Like stepping on the gas of car, engine rpm increases hence the power. Or the case when a compressor is...
  13. S

    Use of Dp across Jet Pulse and HEPA filters in SGT

    Thank You!
  14. S

    Use of Dp across Jet Pulse and HEPA filters in SGT

    Above is a part of the HMI graphic for SGT700, Air intake system.It is obvious the Dp across individual air filters is there as a reflection of the health of the filter(i.e. Choking/resistance to air flow). But what intrigues me is the Dp Across the two filter sets (middle one 0.06Pa), is...
  15. S

    High Pressure on Lube Oil Tank

    A 'Generic' P&ID The Problem still persists. I hope this helps.
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