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  1. Hippo

    Centrifugal Compressor Surge Condition

    I have what I suppose is a basic question about the surge point of a centrifugal compressor. If I'm given the estimated surge in ICFM of a machine, will the surge flow be different if the inlet conditions change? I've always considered a centrifugal compressor as a volumetric device that is...
  2. Hippo

    Acid Gas Line Corrosion

    Hello. I could use some help on determining whether a CS line with 0.125" CA and PWHT is acceptable in an acid gas service. The acid gas composition is ~81wt% H2S, 5wt% water, 11wt% CO2, and the balance light hydrocarbons. The line operates at 15psig and 130degF. It is a saturated vapor...
  3. Hippo

    VFD help for a ChemEng

    Hello. I recently ran into a problem with the startup of a pair of compressors. The vendor was asked to provide VFDs to allow the machines to turn-down to half of the design gas rate. The vendor provided a 1000-rpm 200hp motor. On startup, the compressor could not develop the pressure...
  4. Hippo

    Calculate desuperheated steam temp

    Hello. I'm working on a problem right now that I hope someone here can provide some input/ideas. Here's the situation: I have a superheated steam supply(about 200deg of superheat) that we can't directly supply to an exchanger due to fouling from the high wall temperature. The plan is to...

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