Explanation Given: The average temperature of outer surface of pipe is 280 ° F . The temperature of the surrounding is 50 ° F . The length of the pipe is 300 ft . The diameter of the pipe is 4 in . The heat transfer coefficient is 6 Btu / h ⋅ ft 2 ⋅ °F . Concept used: Write the expression for area of outer surface of pipe. A = π D L ...... (1) Here, D is the diameter of the pipe L is the length of the pipe A is the outer surface of pipe. Write the expression for newton's law of cooling for rate of heat loss. Q = h A ( T o − T s ) ...... (2) Here, Q is the heat loss from the steam pipe, h is the heat transfer coefficient, T s is the surrounding temperature, T o is the outer surface area. Calculation: Convert in into ft as, D = 4 ( 12 ) ( 1 ft 12 in ) = 0 To determine (b) The annual cost of energy loss and also find the price of natural gas.

Heat and Mass Transfer: Fundamentals and Applications

5th Edition

ISBN: 9780073398181

Author: Yunus A. Cengel Dr., Afshin J. Ghajar

Publisher: McGraw-Hill Education

See similar textbooks

Question

Chapter 1, Problem 76EP

To determine

(a)

The rate of heat loss from the steam pipe.

To determine

(b)

The annual cost of energy loss and also find the price of natural gas.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 1, Problem 75P

Chapter 1, Problem 77EP

Chapter 1 Solutions

Heat and Mass Transfer: Fundamentals and Applications

Ch. 1 - How does the science of heat transfer differ from...Ch. 1 - What is the driving force for (a) heat transfer,...Ch. 1 - Prob. 3CP Ch. 1 - How do rating problems in heat transfer differ...Ch. 1 - What is the difference between the analytical and...Ch. 1 - Prob. 6CP Ch. 1 - What is the importance of modeling in engineering?...Ch. 1 - When modeling an engineering process, how is the...Ch. 1 - On a hot summer day, a student turns his fan on...Ch. 1 - Consider two identical rooms, one with a...

Ch. 1 - An ideal gas is heated from 50C to 80C (a) at...Ch. 1 - Prob. 12CP Ch. 1 - What is heat flux? How is it related to the heat...Ch. 1 - What are the mechanisms of energy transfer to a...Ch. 1 - A logic chip used in a computer dissipates 3 W of...Ch. 1 - Consider a 150-W incandescent lamp. The filament...Ch. 1 - A 15-cm-diameter aluminum ball is to be heated...Ch. 1 - Prob. 18P Ch. 1 - Prob. 19P Ch. 1 - A 60-gallon water heated is initially filled with...Ch. 1 - Prob. 21P Ch. 1 - Prob. 22P Ch. 1 - Prob. 23P Ch. 1 - Prob. 24P Ch. 1 - Prob. 25P Ch. 1 - Prob. 26P Ch. 1 - Prob. 27P Ch. 1 - Prob. 28P Ch. 1 - A 5-m6-m8-m room is to be heated by an electrical...Ch. 1 - Prob. 30P Ch. 1 - Prob. 31P Ch. 1 - Air enters the duct of an air-conditioning system...Ch. 1 - Define thermal conductivity, and explain its...Ch. 1 - Prob. 34CP Ch. 1 - Which is a better heat conductor, diamond or...Ch. 1 - How do the thermal conductivity of gases and...Ch. 1 - Why is the thermal conductivity of superinsulation...Ch. 1 - Why do we characterize the heat conduction ability...Ch. 1 - Prob. 39CP Ch. 1 - What are the mechanisms of heat transfer? How are...Ch. 1 - Write down the expression for the physical laws...Ch. 1 - How does heat conduction differ from convection?Ch. 1 - Does any of the energy of the sun reach the earth...Ch. 1 - How does forced convection differ from natural...Ch. 1 - What is the physical mechanism of heat conduction...Ch. 1 - Consider heat transfer a windowless wall of house...Ch. 1 - Consider heat loss through two walls of house on a...Ch. 1 - Consider two houses that are identical except that...Ch. 1 - Consider two walls of a house that are identical...Ch. 1 - Define emissivity and absorptivity. What is...Ch. 1 - What is a blackbody? How do real bodies differ...Ch. 1 - A wood slab with a thickness 0.05 m is subjected...Ch. 1 - Prob. 53P Ch. 1 - The inner and outer surfaces of a 0.5-cm thick...Ch. 1 - Prob. 55P Ch. 1 - Prob. 56P Ch. 1 - The north wall of an electrically heated home is...Ch. 1 - Prob. 58P Ch. 1 - Prob. 59P Ch. 1 - Prob. 60P Ch. 1 - A concreate wall a surface area of 20 m2 and a...Ch. 1 - Prob. 62P Ch. 1 - Prob. 63P Ch. 1 - Prob. 64EP Ch. 1 - Prob. 65EP Ch. 1 - Air at 20C with a convection heat transfer...Ch. 1 - Prob. 67P Ch. 1 - Prob. 68P Ch. 1 - Prob. 69P Ch. 1 - Prob. 70P Ch. 1 - Prob. 71P Ch. 1 - Prob. 72P Ch. 1 - Prob. 73P Ch. 1 - Prob. 74P Ch. 1 - Prob. 75P Ch. 1 - Prob. 76EP Ch. 1 - Prob. 77EP Ch. 1 - Prob. 78P Ch. 1 - Prob. 79P Ch. 1 - Prob. 80P Ch. 1 - Prob. 81P Ch. 1 - Prob. 82P Ch. 1 - Using the conversion factors between W and Btu/h,...Ch. 1 - The outer surface of a spacecraft in space has an...Ch. 1 - Consider a person whose expose surface are is 1.7...Ch. 1 - Prob. 86P Ch. 1 - Two surfaces, one highly polished and the other...Ch. 1 - A spherical interplanetary probe with a diameter...Ch. 1 - Prob. 89P Ch. 1 - Can all three modes of heat transfer occur...Ch. 1 - Can a medium involve (a) conduction and...Ch. 1 - The deep human body temperature of a healthy...Ch. 1 - We often turn the fan on in summer to help us...Ch. 1 - Prob. 94P Ch. 1 - Prob. 95P Ch. 1 - Prob. 96P Ch. 1 - An electronic package with a surface area of 1 m2...Ch. 1 - Consider steady heat transfer between two large...Ch. 1 - Prob. 99P Ch. 1 - Prob. 100P Ch. 1 - A 2-in-diameter spherical ball whose surface is...Ch. 1 - Prob. 102P Ch. 1 - A 3-m-internal-diameter spherical tank made of...Ch. 1 - Prob. 104P Ch. 1 - Solar radiation is incident on a 5-m2 solar...Ch. 1 - Prob. 106P Ch. 1 - Prob. 107P Ch. 1 - Prob. 108P Ch. 1 - Prob. 109EP Ch. 1 - An AISI 304 stainless steel sheet is going through...Ch. 1 - Prob. 111P Ch. 1 - Prob. 112CP Ch. 1 - Prob. 113P Ch. 1 - Prob. 114P Ch. 1 - Prob. 115P Ch. 1 - Prob. 116P Ch. 1 - Prob. 117P Ch. 1 - Why is the metabolic rate of women, in general,...Ch. 1 - What is asymmetric thermal radiation How does it...Ch. 1 - How do (a) draft and (b) cold floor surfaces cause...Ch. 1 - Prob. 121CP Ch. 1 - Why is it necessary to ventilate buildings? What...Ch. 1 - Consider a house in Atlanta, Georgia, that is...Ch. 1 - Prob. 124P Ch. 1 - Prob. 125P Ch. 1 - Prob. 126P Ch. 1 - A 4m5m6m and room is to be heated by one ton (1000...Ch. 1 - Engine valves (cp=440J/kg.Kandp=7840kg/m3) are to...Ch. 1 - Prob. 129P Ch. 1 - Prob. 130P Ch. 1 - A 0.3 -cm-thick, 12-cm-high, and 18-cm-long...Ch. 1 - A 40-cm-long, 800-W electric resistance heating...Ch. 1 - It is well known that wind makes the cold air feel...Ch. 1 - An engine block with a surface area measured to be...Ch. 1 - Prob. 135P Ch. 1 - Prob. 136P Ch. 1 - Prob. 137P Ch. 1 - Consider a person standing in a room maintained at...Ch. 1 - Prob. 139P Ch. 1 - Prob. 140P Ch. 1 - Prob. 141P Ch. 1 - Prob. 142P Ch. 1 - Prob. 143P Ch. 1 - Prob. 144P Ch. 1 - Prob. 145P Ch. 1 - Prob. 146P Ch. 1 - A 2-kW electric resistance heater submerged in...Ch. 1 - Prob. 148P Ch. 1 - A cold bottled drink (m=2.5kg,cp=4200J/kg.K) at...Ch. 1 - Prob. 150P Ch. 1 - Air enters a 12-m-long, 7-cm-diameter pipe at 50oC...Ch. 1 - Prob. 152P Ch. 1 - Steady heat conduction occurs through a...Ch. 1 - Heat is lost through a brick wall (k=0.72W/m.K),...Ch. 1 - Prob. 155P Ch. 1 - A 40-cm-long, 0.4-cm-diameter electric resistance...Ch. 1 - Prob. 157P Ch. 1 - Over 90 percent of the energy dissipated by an...Ch. 1 - On a still, cleat night, the sky appears to be a...Ch. 1 - Prob. 160P Ch. 1 - Prob. 161P Ch. 1 - A persons head can be approximated as a...Ch. 1 - A person standing in a room loses heat to the air...Ch. 1 - Prob. 164P Ch. 1 - Write an essay on how microwave ovens work, and...Ch. 1 - Using information form the utility bill for the...Ch. 1 - It is well know that at the same outdoor air...

Knowledge Booster

Recommended textbooks for you

Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY