Question

In a water distribution system, the pressure of water can be as low as 1.4 psia. The maximum temperature of water allowed in the piping to avoid cavitation is

Answer 1

Answer:

The maximum temperature of water allowed in the piping to avoid cavitation is 111.422 ºF.

Explanation:

In this case, cavitation happens when pressure of water is less than saturation pressure at operation temperature. The maximum temperature of water occurs when pressure of water is equal to the saturation pressure. From property table for saturated water, we get the following information:

$P = 1\,psia \to T = 101.69\,^{\circ}F$

$P = 2\,psia \to T = 126.02\,^{\circ}F$

By linear interpolation, we determine the maximum temperature for $P = 1.4\,psia$ is:

$T = 101.69\,^{\circ}F+\frac{126.02\,^{\circ}F-101.69\,^{\circ}F}{2\,psia-1\,psia}\cdot (1.4\,psia - 1\,psia)$

$T = 111.422\,^{\circ}F$

The maximum temperature of water allowed in the piping to avoid cavitation is 111.422 ºF.