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Engineering and Tech / Fundamentals of Engineering Thermodynamics 7 / Chapter 4 / Problem 82P

Fundamentals of Engineering Thermodynamics | 7th Edition | ISBN: 9780470495902 | Authors: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey

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Chapter 4, Problem 82P

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QUESTION:

For the desuperheater shown in Fig. P4.82, liquid water at state 1 is injected into a stream of superheated vapor entering at state 2. As a result, saturated vapor exits at state 3. Data for steady state operation are shown on the figure. Ignoring stray heat transfer and kinetic and potential energy effects, determine the mass flow rate of the incoming superheated vapor, in \(\mathrm{kg} / \mathrm{min}\).

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QUESTION:

For the desuperheater shown in Fig. P4.82, liquid water at state 1 is injected into a stream of superheated vapor entering at state 2. As a result, saturated vapor exits at state 3. Data for steady state operation are shown on the figure. Ignoring stray heat transfer and kinetic and potential energy effects, determine the mass flow rate of the incoming superheated vapor, in \(\mathrm{kg} / \mathrm{min}\).

ANSWER:

Solution 82P

Step 1:

In this question, we need to find the mass flow rate of the incoming superheated vapor

Data given

Temperature of liquid ${T}_{1}=2{0}^{0}C$

Pressure ${P}_{1}=0.3\ MPa$

Mass of liquid ${m}_{1}=6.37\ kg/min$

Temperature of superheated vapor ${T}_{2}=20{0}^{0}C$

Pressure of superheated vapor ${P}_{2}=0.3\ MPa$

Pressure of saturated vapor ${P}_{3}=0.3\ MPa$

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