Recent content by natedogg1002

  1. N

    Conservation of flow in a pump

    Ok, but what if the density does change over time? For example, my tank is hooked up to a recirculating loop with a heat exchanger. As time goes by, the water temperature in the tank rises about 100°F -- corresponding to a change in density of ~2 lb/ft³. Is the pump actually moving 500 GPM...
  2. N

    Conservation of flow in a pump

    Hello. I am writing a relatively simple simulation code for looking at transient temperatures in a surge tank, which reflects a real-world system. The tank is hooked up to a recirculation loop with a pump and a heat exchanger. The pump has an average flowrate of 500 GPM. Despite the...
  3. N

    Calculate Pressure of Steam in ∅12" Pipe?

    Thank you for guiding me through this. Trust me, I don't plan on dragging you through this much longer. However, I get a negative enthalpy when I solve for h1o. From the steam tables, h1i = 1135 (Btu/lb) [saturated steam] h2i = 78 [110 F saturated water] h2o = 138 [170 F...
  4. N

    Calculate Pressure of Steam in ∅12" Pipe?

    No, this is a professional question, but it certainly follows like a homework question. If I should move it, let me know. I edited the first post to include the entire problem I need to solve. And yes, I do agree that the outlet quality is what I'm after. From the standpoint of the first...
  5. N

    Calculate Pressure of Steam in ∅12" Pipe?

    Q_Goest, thanks for replying. Interpolating in the steam table gives me a saturation pressure of about 6.8 psi at 176 F. But does that necessarily mean that the pressure in the pipe is 6.8 psi? I remembered I could pull the ideal gas trick, and I then calculate a pressure of nearly 6.9 psi -...
  6. N

    Calculate Pressure of Steam in ∅12" Pipe?

    Hi, here's a problem I've recently come across, and it's bugging me that I can't wrap my mind around it. I need to calculate the pressure of steam in a ∅12" pipe. I know that the steam flows at 8700 lb/hr over a 24 minute period, and that the average steam temperature is 176°F. I also know...
Back
Top