(a) Interpretation: The rate at which heat is transferred from the condenser is to be calculated. Concept introduction: The rate of heat transfer is calculated as: Q ˙ = n ˙ Δ H ^ .......(1) For an adiabatic system, the heat lost by one component in the system is the heat gained by another component in that system. Thus, Q ˙ g a i n = − Q ˙ l o s t .......(2)

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Answer 1

Question

Chapter 8, Problem 8.43P

Interpretation Introduction

(a)

Interpretation:

The rate at which heat is transferred from the condenser is to be calculated.

Concept introduction:

The rate of heat transfer is calculated as:

Q˙=n˙ΔH^ .......(1)

For an adiabatic system, the heat lost by one component in the system is the heat gained by another component in that system. Thus,

Q˙gain=−Q˙lost .......(2)

Interpretation Introduction

(b)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the lower rate than that calculated in part (a).

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Interpretation Introduction

(c)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the higher rate than that calculated in part (a). Also, a phase diagram is to be drawn.

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

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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

Chapter 8, Problem 8.43P

Interpretation Introduction

(a)

Interpretation:

The rate at which heat is transferred from the condenser is to be calculated.

Concept introduction:

The rate of heat transfer is calculated as:

Q˙=n˙ΔH^ .......(1)

For an adiabatic system, the heat lost by one component in the system is the heat gained by another component in that system. Thus,

Q˙gain=−Q˙lost .......(2)

Interpretation Introduction

(b)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the lower rate than that calculated in part (a).

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Interpretation Introduction

(c)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the higher rate than that calculated in part (a). Also, a phase diagram is to be drawn.

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

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Answer 3

Question

Chapter 8, Problem 8.43P

Interpretation Introduction

(a)

Interpretation:

The rate at which heat is transferred from the condenser is to be calculated.

Concept introduction:

The rate of heat transfer is calculated as:

Q˙=n˙ΔH^ .......(1)

For an adiabatic system, the heat lost by one component in the system is the heat gained by another component in that system. Thus,

Q˙gain=−Q˙lost .......(2)

Interpretation Introduction

(b)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the lower rate than that calculated in part (a).

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Interpretation Introduction

(c)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the higher rate than that calculated in part (a). Also, a phase diagram is to be drawn.

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

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Answer 4

Question

Chapter 8, Problem 8.43P

Interpretation Introduction

(a)

Interpretation:

The rate at which heat is transferred from the condenser is to be calculated.

Concept introduction:

The rate of heat transfer is calculated as:

Q˙=n˙ΔH^ .......(1)

For an adiabatic system, the heat lost by one component in the system is the heat gained by another component in that system. Thus,

Q˙gain=−Q˙lost .......(2)

Interpretation Introduction

(b)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the lower rate than that calculated in part (a).

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Interpretation Introduction

(c)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the higher rate than that calculated in part (a). Also, a phase diagram is to be drawn.

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

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Answer 5

Chapter 8, Problem 8.43P

Interpretation Introduction

(a)

Interpretation:

The rate at which heat is transferred from the condenser is to be calculated.

Concept introduction:

The rate of heat transfer is calculated as:

Q˙=n˙ΔH^ .......(1)

For an adiabatic system, the heat lost by one component in the system is the heat gained by another component in that system. Thus,

Q˙gain=−Q˙lost .......(2)

Interpretation Introduction

(b)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the lower rate than that calculated in part (a).

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Interpretation Introduction

(c)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the higher rate than that calculated in part (a). Also, a phase diagram is to be drawn.

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Answer 6

Chapter 8, Problem 8.43P

Interpretation Introduction

(a)

Interpretation:

The rate at which heat is transferred from the condenser is to be calculated.

Concept introduction:

The rate of heat transfer is calculated as:

Q˙=n˙ΔH^ .......(1)

For an adiabatic system, the heat lost by one component in the system is the heat gained by another component in that system. Thus,

Q˙gain=−Q˙lost .......(2)

Answer 7

Chapter 8, Problem 8.43P

Interpretation Introduction

(a)

Interpretation:

The rate at which heat is transferred from the condenser is to be calculated.

Concept introduction:

The rate of heat transfer is calculated as:

Q˙=n˙ΔH^ .......(1)

For an adiabatic system, the heat lost by one component in the system is the heat gained by another component in that system. Thus,

Q˙gain=−Q˙lost .......(2)

Answer 8

Interpretation Introduction

(b)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the lower rate than that calculated in part (a).

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the lower rate than that calculated in part (a).

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Answer 10

Interpretation Introduction

(c)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the higher rate than that calculated in part (a). Also, a phase diagram is to be drawn.

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Answer 11

Interpretation Introduction

(c)

Interpretation:

The state of the product stream is to be determined if the heat is transferred at the higher rate than that calculated in part (a). Also, a phase diagram is to be drawn.

Concept introduction:

Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.

Answer 12

Expert Solution & Answer

Answer 13

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Answer 14

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Answer 15

Ch. 8 - 8.1. The specific internal energy of formaldehyde...Ch. 8 - Prob. 8.2P Ch. 8 - Prob. 8.3P Ch. 8 - Prob. 8.4P Ch. 8 - Prob. 8.5P Ch. 8 - 8.6. Table B.7 of Appendix B gives the following...Ch. 8 - Prob. 8.7P Ch. 8 - Two formulas for the heat capacity of CO are given...Ch. 8 - 8.9. Table B.2 lists values of the heat capacity...Ch. 8 - Prob. 8.10P

Solution Summary: The author explains the rate at which heat is transferred from the condenser.

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