Heating Ventilating and Air Conditioning: Analysis and Design
6th Edition
ISBN: 9780471470151
Author: Faye C. McQuiston, Jeffrey D. Spitler, Jerald D. Parker
Publisher: Wiley, John & Sons, Incorporated
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 5, Problem 5.5P
Compute the thermal resistance per unit length for a 4 in. schedule 40 steel pipe with
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
I want to know how much heat the tube lost due to the material it is made of aluminum or steel. Even if it is a small difference in temperature. I want to know which material Conduct Heat the Best through this problem.
material: Aluminum, steel ( the dimensions are the same for both)
temperature touching cylinder: 65 Celcius
temeprature inside cylinder 64.5 celsius
room temperature 24 celcius
Tube measurements
outer radius r1
r1 = 4 in
inner radius r2
r2 = 3 in
outer circumference C1
C1 = 25.132741228718 in
inner circumference C2
C2 = 18.849555921539 in
height
h = 8 in
wall thickness
t = 1 in
R Value:
Wall: 0.961m2k/w
Floor: 0.676m2k/w
Roof: 0.7465m2k/w
In a table format show with calculations and research how much money you can save by installing a 115mm layer of insulation (R2.9) in your walls, floor and ceiling over a 5 and 10 year period. Consider the capital costs. Hint: State the current R value of each component. Convert to U value. Calculate new R value of each component (walls, floor and ceiling). Convert to U value. Use Q(W)=A*(change in U)*temperature change. Determine price for installation of new insulation. Determine price saved based on less heat loss through each component separately, then add all values together, and calculate per 5 years and per 10 years. Present all of this information in a table. You do not need to draw any diagrams, simply add the R value in series with your current components R values.
Assume the energy cost is 25 cents kWh
. thermodynamics-
A platinum resistance thermometer has a resistance of 5 ohm at 0°C and 2.5 ohm at 100°C Calculate the temperature when the resistance indicated is 10 ohm.
Chapter 5 Solutions
Heating Ventilating and Air Conditioning: Analysis and Design
Ch. 5 - Determine the thermal conductivity of 4 in. (100...Ch. 5 - Compute the unit conductance C for 512 in. (140...Ch. 5 - Compute the unit thermal resistance and the...Ch. 5 - What is the unit thermal resistance for an inside...Ch. 5 - Compute the thermal resistance per unit length for...Ch. 5 - Assuming that the blocks are not filled, compute...Ch. 5 - The partition of Problem 5-4 has still air on one...Ch. 5 - The pipe of Problem has water flowing inside with...Ch. 5 - Compute the overall thermal resistance of a wall...Ch. 5 - Compute the overall heat-transfer coefficient for...
Ch. 5 - Estimate what fraction of the heat transfer for a...Ch. 5 - Make a table similar to Table 5-4a showing...Ch. 5 - Estimate the unit thermal resistance for a...Ch. 5 - Refer to Problem 5-13, and estimate the unit...Ch. 5 - A ceiling space is formed by a large flat roof and...Ch. 5 - A wall is 20 ft (6.1 m) wide and 8 ft (2.4 m) high...Ch. 5 - Estimate the heat-transfer rate per square foot...Ch. 5 - A wall exactly like the one described in Table...Ch. 5 - Prob. 5.19PCh. 5 - Compute the overall heat-transfer coefficient for...Ch. 5 - Compute the overall heat transfer for a single...Ch. 5 - Determine the overall heattransfer coefficient for...Ch. 5 - A basement is 2020ft(66m) and 7 ft (2.13 m) below...Ch. 5 - Estimate the overall heat-transfer coefficient for...Ch. 5 - Rework Problem 5-23 assuming that the walls are...Ch. 5 - A heated building is built on a concrete slab with...Ch. 5 - A basement wall extends 6 ft (1.8 m) below grade...Ch. 5 - A 2440ft(7.312.2m) building has a full basement...Ch. 5 - The floor of the basement described in Problem...Ch. 5 - Assume that the ground temperature tg is 40 F (10...Ch. 5 - Use the temperatures given in Problem 5-30 and...Ch. 5 - A small office building is constructed with a...Ch. 5 - A 100 ft length of buried, uninsulated steel pipe...Ch. 5 - Estimate the heat loss from 100 m of buried...Ch. 5 - A large beverage cooler resembles a small building...Ch. 5 - Consider the wall section shown in Fig. 5-10. (a)...Ch. 5 - A building has floor plan dimensions of 3060ft....Ch. 5 - Compute the temperature of the metal roof deck of...Ch. 5 - Consider the wall section shown in Fig. -4a,...Ch. 5 - Consider the knee space shown in Fig. 5-11. The...Ch. 5 - Estimate the temperature in an unheated basement...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
3.3 It is known that a vertical force of 200 lb is required to remove the nail at C from the board. As the nail...
Vector Mechanics for Engineers: Statics
3.3 It is known that a vertical force of 200 lb is required to remove the nail at C from the board. As the nail...
Vector Mechanics for Engineers: Statics, 11th Edition
CONCEPT QUESTIONS
15.CQ3 The ball rolls without slipping on the fixed surface as shown. What is the direction ...
Vector Mechanics for Engineers: Statics and Dynamics
Steady state conduction rate to the warm compressor to the net power produces theoretically by thermodynamic ba...
Introduction to Heat Transfer
Locate the centroid of the area. Prob. 9-17
INTERNATIONAL EDITION---Engineering Mechanics: Statics, 14th edition (SI unit)
How is the hydrodynamic entry length defined for flow in a pipe? Is the entry length longer in laminar or turbu...
Fluid Mechanics Fundamentals And Applications
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.Similar questions
- A pin fin installed to a wall is replaced by the same material and diameter but with larger length. Select the correct statement:. Fin efficiency will increase but effectiveness will decrease. Fin efficiency will decrease but effectiveness will increase.. Both efficiency and effectiveness of the fin will increase.arrow_forwardA rectangular tube (remember hydraulic diameter) of sides 25mm and 40mm. If air RT passes through the tube at 0.05 m^3/s, what is the convection coefficient inside the tube? The inside of the tube is held at 200 celsius. Note- RT is 25 celsiusarrow_forwardA steel pipe has an inside diameter of d = 350 mm and an outside diameter of D = 158 mm. The length of the pipe is L = 5.0 m. The changes in dimension caused by an increase in temperature of 80°C for the: Outside diameter __ mm Inside diameter __ mm Lenght __ mm 3 decimal places standard coefficient of thermal expansion: steel - 11.25x10^-6 / degrees celcius Aluminum - 23x10^-6 / degrees celciusarrow_forward
- Derive an expression for the critical thickness of insulation of cylindrical pipe. Explain in detail.arrow_forwardCalculate the heat loss per linear ft from 2 in. nominal pipe (2.375 in. outside diameter)covered with 1 in. of an insulating material having an average thermal conductivity of0.0375 Btu/hr-ft-F. Assume that the inner and outer surface temperatures of the insulationare 380 °F and 80 °F respectively.arrow_forwardMN = 48 SN = 79 (1&3) with thickness of 7.5mmarrow_forward
- Suppose a 3 in schedule 80 steel pipe is covered with 1 in of an insulation havingk = 60 mW/moC and the outside of the insulation is exposed to an environmenthaving h = 10 W/m2oC and Tf = 20oC. The temperature of the inside of the pipe is250oC. For unit length of the pipe calculate (a) the overall thermal resistance and(b) the heat loss (in Watts).arrow_forwardDistilled water stands in a glass tube of 9 mm diameter at a height of 24 mm. What is the true static height? Use = 0.0742 N/m.arrow_forward1. A cable used to lift heavy materials can resist breaking even under a load of 1 meganewtons. The steel cable must support twice that load for safety purposes. By how much the steel cable will stretch if it carries 1 meganewtons of load? Assume 8.0 m initial length of the cable. 2. Ships and sailing vessels often carry lead ballast in various forms, such as bricks, to keep the ship properly oriented and upright in the water. Suppose a ship takes on cargo and the crew jettisons a total of 0.500 m3 of lead ballast into water 2 000 m deep. Seawater's density is equal to 1.025 g/cc while lead's bulk modulus equals to 42.0 GPa. Calculate the weight of water in a column with cross section of 1.00 m2. Find the change in the pressure at 2.0 km depth. Find the change in the volume of the lead at 2.0 km depth.arrow_forward
- 30_ Select the correct statement for a radial conductivity exp Select one: a. The mid outer surface represent the heating area while the side surface represent the cooling area b. None of them is true c. The outer section represent the heating area and the inner section represent the cooling area d. The inner section represent the heating area and the outer section represent the cooling area 24_ The device with highest static head loss is Select one: a. No static head loss in this experiment b. Venturi meter c. Orifice plan d. Rotameter 26_ If surface is not leveled under the center of pressure tank Select one: a. Legs of the device can be rotated to create level surface b. Items should be added under the device to create level surface c. The device has and auto leveling d. nonearrow_forward1 example each Conductive heat flow through flat surface Conductive heat flow throw composite wallarrow_forwardNote: 1 Torr= 0.133 kPa & 1 atm = 101.325 kPaarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
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
Understanding Conduction and the Heat Equation; Author: The Efficient Engineer;https://www.youtube.com/watch?v=6jQsLAqrZGQ;License: Standard youtube license