Saturated liquid water flows through a pipe at 10 MPa. A.) Assuming thermodynami

Question

Saturated liquid water flows through a pipe at 10 MPa.

A.) Assuming thermodynamic equilibrium to exist at any given cross-section, determine the temperature (T).

B.) Assuming thermodynamic equilibrium to exist at any given cross-section, determine the quality of water.

C.) A small leak develops and as water jets out, it quickly equilibrates with the pressure outside, which is at 100 kPa. Some of the water evaporates and the composition of the jet is observed as a mixture of saturated liquid and vapor. Determine the temperature of the jet in C.

Explanation / Answer

a) saturated liquid water at 10 MPa then its temperature is at saturation temperature is 311.1oC because of thermodynamic equilbrium exist at any cross section.

b) it is saturated liquid at all cross sections then it quality of water is 0

c) leakage to outside it is equilbrium with pressure outside then its pressure will be 100 kPa then its temperature is 99.62oC

values are taken from the steam tables

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