(a) Interpretation: Write an energy balance on the turbine and calculate the outlet stream temperature. Concept introduction: First law of Thermodynamics for a closed system. Δ u + Δ E k + Δ E p = Q − W The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system. The definitions of the symbols are Δ u = Change in internal energy, Δ E k = Change in kinetic energy, Δ E p = Change in potential energy, Q = Heat added to system and W = Work done by the system

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Answer 1

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Chapter 7, Problem 7.33P

Interpretation Introduction

(a)

Interpretation:

Write an energy balance on the turbine and calculate the outlet stream temperature.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(b)

Interpretation:

Write an overall energy balance equation for the heater and calculate the required input to steam.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(c)

Interpretation:

Verify that the overall energy balance on the units are satisfied.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(d)

Interpretation:

Show that it is reasonable to neglect the change in kinetic energy for this unit.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

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Ex. HW. A vertical glass tube, 2cm ID & 5m long in heated uniformly over its length. The water enter at (200-204 C) & 68.9 bar calculated the pressure drop if the flowrate 0.15 Kg/s & the power applied as a heat to the fluid is 100KW using the homogeneous model. Given that enthalpy at inlet temp.=0.87MJ/Kg, enthalpy saturation temp (285C)=1.26 MJ/Kg and μl=0.972*10-4 Ns/m2, μG=2.89*10-5 Ns/m2, UG=2.515*10-2m3/Kg and the change in UG over range of pressure=-4.45*10-4m3/Kg/bar.

4. An experimental test rig is used to examine two-phase flow regimes in horizontal pipelines. A particular experiment involved uses air and water at a temperature of 25°C, which flow through a horizontal glass tube with an internal diameter of 25.4 mm and a length of 40 m. Water is admitted at a controlled rate of 0.026 kgs at one end and air at a rate of 5 x 104 kgs in the same direction. The density of water is 1000 kgm³, and the density of air is 1.2 kgm. Determine the mass flow rate, the mean density, gas void fraction, and the superficial velocities of the air and water. Answer: 0.02605 kgs 1, 61.1 kgm³, 0.94, 0.822 ms-1, 0.051 ms-1

Answer 2

Question

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Chapter 7, Problem 7.33P

Interpretation Introduction

(a)

Interpretation:

Write an energy balance on the turbine and calculate the outlet stream temperature.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(b)

Interpretation:

Write an overall energy balance equation for the heater and calculate the required input to steam.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(c)

Interpretation:

Verify that the overall energy balance on the units are satisfied.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(d)

Interpretation:

Show that it is reasonable to neglect the change in kinetic energy for this unit.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Expert Solution & Answer

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Answer 3

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Chapter 7, Problem 7.33P

Interpretation Introduction

(a)

Interpretation:

Write an energy balance on the turbine and calculate the outlet stream temperature.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(b)

Interpretation:

Write an overall energy balance equation for the heater and calculate the required input to steam.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(c)

Interpretation:

Verify that the overall energy balance on the units are satisfied.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(d)

Interpretation:

Show that it is reasonable to neglect the change in kinetic energy for this unit.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Expert Solution & Answer

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Answer 4

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Chapter 7, Problem 7.33P

Interpretation Introduction

(a)

Interpretation:

Write an energy balance on the turbine and calculate the outlet stream temperature.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(b)

Interpretation:

Write an overall energy balance equation for the heater and calculate the required input to steam.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(c)

Interpretation:

Verify that the overall energy balance on the units are satisfied.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(d)

Interpretation:

Show that it is reasonable to neglect the change in kinetic energy for this unit.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Expert Solution & Answer

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Answer 5

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Answer 6

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Answer 7

Chapter 7, Problem 7.33P

Interpretation Introduction

(a)

Interpretation:

Write an energy balance on the turbine and calculate the outlet stream temperature.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(b)

Interpretation:

Write an overall energy balance equation for the heater and calculate the required input to steam.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(c)

Interpretation:

Verify that the overall energy balance on the units are satisfied.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Interpretation Introduction

(d)

Interpretation:

Show that it is reasonable to neglect the change in kinetic energy for this unit.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Answer 8

Chapter 7, Problem 7.33P

Interpretation Introduction

(a)

Interpretation:

Write an energy balance on the turbine and calculate the outlet stream temperature.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Answer 9

Chapter 7, Problem 7.33P

Interpretation Introduction

(a)

Interpretation:

Write an energy balance on the turbine and calculate the outlet stream temperature.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Answer 10

Interpretation Introduction

(b)

Interpretation:

Write an overall energy balance equation for the heater and calculate the required input to steam.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Answer 11

Interpretation Introduction

(b)

Interpretation:

Write an overall energy balance equation for the heater and calculate the required input to steam.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Answer 12

Interpretation Introduction

(c)

Interpretation:

Verify that the overall energy balance on the units are satisfied.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Answer 13

Interpretation Introduction

(c)

Interpretation:

Verify that the overall energy balance on the units are satisfied.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Answer 14

Interpretation Introduction

(d)

Interpretation:

Show that it is reasonable to neglect the change in kinetic energy for this unit.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Answer 15

Interpretation Introduction

(d)

Interpretation:

Show that it is reasonable to neglect the change in kinetic energy for this unit.

Concept introduction:

First law of Thermodynamics for a closed system.

Δ u + Δ Ek+Δ Ep = Q−W

The right hand side of the equation gives the total energy transferred to the system and the left hand side gives gain in total energy of the system.

The definitions of the symbols are Δ u = Change in internal energy, Δ Ek = Change in kinetic energy, Δ Ep = Change in potential energy, Q = Heat added to system and W = Work done by the system

Answer 16

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Ch. 7 - A certain gasoline engine has an efficiency of...Ch. 7 - Prob. 7.2P Ch. 7 - Prob. 7.3P Ch. 7 - Prob. 7.4P Ch. 7 - Liquid ethanol is pumped from a large storage tank...Ch. 7 - Air at 300°C and 130 kPa flows through a...Ch. 7 - Prob. 7.7P Ch. 7 - Prob. 7.8P Ch. 7 - Prob. 7.9P Ch. 7 - Prob. 7.10P

Chapter 7 Solutions