Seeking help with circulating water system design
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Gentlemen, could you help check what the pressure is at various points in the circulating water system? Is there anything wrong with the design of this system?
The device between P1 and P3 is a closed-type cooling tower, which functions as a heat exchanger
Don’t they even have the money to install a pressure gauge at the monitoring point? Also, is that size indicator horizontal or vertical? It is best to conduct on-site measurements for such issues.
24 meters in height difference, 80 meters horizontally
Is the tap water used for replenishing water under pressure? The pressure at P3 is affected by this; the pressure at P4 is equal to P3 + 0.3 MPa, the pressure at P2 is approximately equal to P4 – 0.24 MPa, and the pressure at P1 is approximately equal to the pressure at P4
P1≤0.3; P2＜P4-0.24; P3≈P1; P4=P3+0.3
Closed-loop circulating water requires a pressure stabilization device; when users are concentrated, an elevated tank should be considered, while in the case of dispersed users, a pressure stabilizing tank is used. P1 pressure can be considered as the static pressure of the highest-demanding user. The heat exchanger should be installed at the pump outlet. In your diagram, P1 = 0.8 MPa; P3 = 0.8 – pressure drop across the heat exchanger (estimated at 0.7); P4 = P3 + 0.3 (1 MPa); P2 = P4 – pipe losses and user-side pressure drops (0.9 MPa)