I have a piping system that is supplied by a centrifugal pump. The system consists of pipe, 2 heat exchangers, some elevation gain and loss and ends up in an atmospheric tank. If I wanted to know the pressure that one of the heat exchangers could see I need to calculate the pressure drop in the system of that heat exchanger and the downstream equipment, correct?

I believe I would use the net elevation change as well, correct?

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  • $\begingroup$ If you only wanted the pressure at the heat exchanger exit, you would just need to include the downstream equipment. $\endgroup$ – Chester Miller Jan 12 at 1:37
  • $\begingroup$ why not just put a tee in the plumbing and install a pressure gauge right where you want it? $\endgroup$ – niels nielsen Jan 12 at 1:38
  • $\begingroup$ The system is in service and I can't add a pressure gauge right now. Chester, i agree. My question is for the pressure drop associated with elevation I need to sum up the total vertical GAIN after the heat exchanger, correct? There is some fall after as well but Im thinking its like sizing a pump and wouldn't want to include the negative rise. So, in summary the calculation of the pressure drop is the downstream equipment, frictional losses in piping and the total elevation gain corrected for the density of the fluid. $\endgroup$ – Matt Jan 13 at 12:42
  • $\begingroup$ To add a little more clarity, the piping after the heat exchanger goes up and down a few times, the net change in the system is a loss of 4 feet from the point i am interested in. But, to calculate the pressure on the exchanger i need to know the elevation from that point to the highest point after, correct? $\endgroup$ – Matt Jan 13 at 12:44

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