Explanation The following figure shows the heat exchanger for applying steady flow energy equation. Figure-(1) Write the expression for steady flow energy equation for energy balance. m 1 ( h 1 − h 2 ) + m 3 ( h 3 − h 4 ) = 0 m 1 ( h 1 − h 2 ) = m 3 ( h 4 − h 3 ) m 3 = m 1 ( h 1 − h 2 ) ( h 4 − h 3 ) (I) Here, enthalpy at entry for steam is h 1 , enthalpy at exit for steam is h 2 , enthalpy at entry for cooling water is h 3 , enthalpy at exit for cooling water is h 4 , mass flow rate for steam is m ˙ 1 and mass flow rate for cooling water is m ˙ 3 . Write the expression for enthalpy at state (1). h 1 = h 2 + x 1 ( h g − h 2 ) (II) Here, the dryness fraction at section (1) is x 1 . Conclusion: Refer to table A-3 ,“Properties of saturated water” to obtain the values of specific enthalpy of saturated liquid and saturated vapour at 0.08 bar as 173.88 kJ / kg and 2576.98 kJ / kg respectively. Substitute 173.88 kJ / kg for h 2 at pressure 0.08 bar and 2576.98 kJ / kg for h g in Equation (II). h 1 = 173.88 kJ / kg + 0.932 × ( 2576.98 kJ / kg − 173.88 kJ / kg ) = 173

Fundamentals of Engineering Thermodynamics, Binder Ready Version

8th Edition

ISBN: 9781118820445

Author: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey

Publisher: WILEY

See similar textbooks

Videos

Question

Chapter 4.12, Problem 74P

To determine

The mass flow rate of cooling water.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 4.12, Problem 73P

Chapter 4.12, Problem 75P

Students have asked these similar questions

100 As a spring is heated, its spring constant decreases. Suppose the spring is heated and then cooled so that the spring constant at time t is k(t) = t sin + N/m. If the mass-spring system has mass m = 2 kg and a damping constant b = 1 N-sec/m with initial conditions x(0) = 6 m and x'(0) = -5 m/sec and it is subjected to the harmonic external force f (t) = 100 cos 3t N. Find at least the first four nonzero terms in a power series expansion about t = 0, i.e. Maclaurin series expansion, for the displacement: • Analytically (hand calculations) Creating Simulink Model Plot solutions for first two, three and four non-zero terms as well as the Simulink solution on the same graph for the first 15 sec. The graph must be fully formatted by code.

Two springs and two masses are attached in a straight vertical line as shown in Figure Q3. The system is set in motion by holding the mass m₂ at its equilibrium position and pushing the mass m₁ downwards of its equilibrium position a distance 2 m and then releasing both masses. if m₁ = m² = 1 kg, k₁ = 3 N/m and k₂ = 2 N/m. (y₁ = 0) www k₁ = 3 Jm₁ = 1 k2=2 www (Net change in spring length =32-31) (y₂ = 0) m₂ = 1 32 32 System in static equilibrium System in motion Figure Q3 - Coupled mass-spring system Determine the equations of motion y₁ (t) and y₂(t) for the two masses m₁ and m₂ respectively: Analytically (hand calculations) Using MATLAB Numerical Functions (ode45) Creating Simulink Model Produce an animation of the system for all solutions for the first minute.

Two large tanks, each holding 100 L of liquid, are interconnected by pipes, with the liquid flowing from tank A into tank B at a rate of 3 L/min and from B into A at a rate of 1 L/min (see Figure Q1). The liquid inside each tank is kept well stirred. A brine solution with a concentration of 0.2 kg/L of salt flows into tank A at a rate of 6 L/min. The diluted solution flows out of the system from tank A at 4 L/min and from tank B at 2 L/min. If, initially, tank A contains pure water and tank B contains 20 kg of salt. A 6 L/min 0.2 kg/L x(t) 100 L 4 L/min x(0) = 0 kg 3 L/min 1 L/min B y(t) 100 L y(0) = 20 kg 2 L/min Figure Q1 - Mixing problem for interconnected tanks Determine the mass of salt in each tank at time t≥ 0: Analytically (hand calculations) Using MATLAB Numerical Functions (ode45) Creating Simulink Model Plot all solutions on the same graph for the first 15 min. The graph must be fully formatted by code.

Chapter 4 Solutions

Fundamentals of Engineering Thermodynamics, Binder Ready Version

Ch. 4.12 - Prob. 1E Ch. 4.12 - 2. When a drip coffeemaker on-off switch is turned...Ch. 4.12 - Prob. 3E Ch. 4.12 - Prob. 4E Ch. 4.12 - Prob. 5E Ch. 4.12 - Prob. 6E Ch. 4.12 - Prob. 7E Ch. 4.12 - Prob. 8E Ch. 4.12 - Prob. 9E Ch. 4.12 - 10. How does the operator of a pumper-tanker fire...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.