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# Solution: Calculate the inlet velocity (m/s)

#### Problem Statement: Power Plant Engineering

Power Plant Elements Problem Solving

Water substance at 70 bar and 65ยฐC enters a boiler tube of constant inside diameter of 25 mm. The water leaves the boiler tube at 50 bar and 700 K at velocity of 150 m/s. Calculate the inlet velocity (m/s).

From steam tables:

@ 70 bar (7 Mpa) and 65ยฐC:ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ฯ1 = 0.001017 m3/kg

@ 50 bar (5 Mpa) and 700 K (427ยฐC):ย ย ย ย ย ย ย  ฯ2 = 0.06081 m3/kg

A. 1.56

B. 2.51

C. 1.672

D. 3.230

The the inlet velocity (m/s) is equal to 2.51 m/s.

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