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  1. GGW

    Force from a flow impinging on a flat plate

    I guess the best way to define what you need to do is give an example based on your numbers given and some assumed values. I assume that the 7 bar is gauge pressure. Then the absolute pressure would be 7 barg plus 1 atm or 8.013 bara. I will further assume a temperature of 16 C. From this...
  2. GGW

    Ethyline pipeline operating near triple point

    Well, I goofed here also. The critical pressure and temperature for ethylene is 50.75 bara, 282.65 K. I said in my earlier response that at 52 bara, 10 C you were in a slightly subcooled state. Actually, you are in a compressed liquid state. At that condition which is above the critical...
  3. GGW

    Ethyline pipeline operating near triple point

    At 52.8 bara the saturation temperature of ethylene (C2H4) is 11.3 C. At 10 C, 52.8 bara you are dealing with a slightly subcooled liquid. At 20 bara the saturation temperature of ethylene is –28.8 C. At 10 C, 20 bara you are dealing with a superheated vapor. The freeze point of ethylene is...
  4. GGW

    use of sea water for condenser water

    abuwandi, Sea water is used in many shell and tube exchangers (if this is the type of exchanger used) for condensing refrigerants used in air conditoning and marine applications. The most common tube material used is 90 / 10 Cu-Ni with 90 / 10 Cu-Ni clad tubesheets. The inside of the heads...
  5. GGW

    Calculating leakage rates

    jberrio, In your June 6 post you ask the question, "Is there a way, knowing the volume of the system, the size of piping, and the working fluid, to calculate the amount of water needed to change the pressure in the system?" You state that the pressue change in the low pressure...
  6. GGW

    Pipe flowing compressible fluid

    Luiz, For non-significant changes in fluid density the equations you present in your thread can be used as "dcasto (chemical)" points out (July 8, thread response). However, for signifcant changes in fluid density the standard fluid mechanic relationships are used with the addition...

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