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  • Users: Hippo
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  1. Hippo

    How to calculate compressor discharge temperature by hand?

    I was around a 2.3 compression ratio. I wouldn't think the error would be too large, otherwise it would have likely had been noted in GPSA. I'm speculating obviously, but I just wouldn't expect the answer to be too different. Mark
  2. Hippo

    How to calculate compressor discharge temperature by hand?

    I just performed this calc today, and the GPSA calculated discharge temperature was within 5 degrees of the vendor supplied discharge temperature. Hysys was also within 5 degrees. The vendor number was higher in both cases. I'm surprised you are getting a much higher number. If you post the...
  3. 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...
  4. 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...
  5. 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...
  6. Hippo

    Calculate desuperheated steam temp

    Thanks for the replies. The exchanger will be above the return drum, and the steam pressure drop through the exchanger is minimal. There will be enough elevation difference for the hydraulics to work. I had asked about an inline desuperheater, but that's not the direction the client wants to...
  7. 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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