BuyFind*arrow_forward*

5th Edition

Saeed Moaveni

Publisher: Cengage Learning

ISBN: 9781305084766

Chapter 11, Problem 39P

Textbook Problem

3 views

Nine old 12 ft^{2} windows with

To determine

Find the energy saving for the period of five hours.

**Given data:**

The U-factor for old windows,

The U-factor for new windows,

Area of the windows,

Inside temperature,

Outside temperature,

**Formula used:**

The formula for the heat loss through the window,

Here,

**Calculation:**

Substitute

The heat loss through one old window for 5 hours is,

Hence the heat loss through 9 old windows will be,

Substitute

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

Show all chapter solutions

Ch. 11.2 - Explain what is meant by temperature and give...Ch. 11.2 - Explain why an absolute temperature is defined and...Ch. 11.2 - Give examples of how temperature is measured.Ch. 11.2 - What does cause heat transfer?Ch. 11.2 - What are the modes of heat transfer?Ch. 11.2 - VocabularyState the meaning of the following...Ch. 11.4 - Describe factors that affect thermal comfort.Ch. 11.4 - Explain what is meant by metabolic rate.Ch. 11.4 - What is a unit that is commonly used to express...Ch. 11.4 - What does the heating value of a fuel represent?

Ch. 11.4 - VocabularyState the meaning of the following...Ch. 11.6 - Explain what is meant by a degree-day.Ch. 11.6 - Describe the method that engineers use to estimate...Ch. 11.6 - Define coefficient of volumetric expansion.Ch. 11.6 - Explain what is meant by specific heat.Ch. 11.6 - VocabularyState the meaning of the following...Ch. 11 - Investigate the value of temperature for the...Ch. 11 - Using Excel or a spreadsheet of your choice,...Ch. 11 - Alcohol thermometers can measure temperatures in...Ch. 11 - What is the equivalent value of T = 60 C in...Ch. 11 - What is the equivalent value of T = 120 C in...Ch. 11 - The inside temperature of an oven is maintained at...Ch. 11 - Obtain information about K-, E-, and R-type...Ch. 11 - A manufacturer of loose-fill cellulose insulating...Ch. 11 - Calculate the R-value for the following materials:...Ch. 11 - Calculate the thermal resistance due to convection...Ch. 11 - A typical exterior masonry wall of a house, shown...Ch. 11 - In order to increase the thermal resistance of a...Ch. 11 - A typical ceiling of a house consists of items...Ch. 11 - Estimate the change in the length of a power...Ch. 11 - Calculate the change in 5 m long copper wire when...Ch. 11 - Determine the temperature rise that would occur...Ch. 11 - The thermal conductivity of a solid material can...Ch. 11 - A copper plate, with dimensions of 3 cm 3 cm 5...Ch. 11 - An aluminum plate, with dimensions of 3 cm 3 cm ...Ch. 11 - Calorimeters are devices that are commonly used to...Ch. 11 - Refer to Tables 11.9 and 11.10 to answer this...Ch. 11 - Convert the results of Example 11.13 from Btu to...Ch. 11 - Calculate the heat transfer rate from a 1000 ft2,...Ch. 11 - For Problem 11.27, calculate the reduction in the...Ch. 11 - The side walls of a refrigerator are made from two...Ch. 11 - Calculate the amount of thermal energy required to...Ch. 11 - In a commercial water heater, 20 gallons/min of...Ch. 11 - A gas furnace puts out 60,000 Btuh to compensate...Ch. 11 - Calculate the heat loss from a double-pane glass...Ch. 11 - Determine the heat-transfer rate from an...Ch. 11 - Calculate the amount of radiation emitted for a...Ch. 11 - For Problems 11.11, 11.12, and 11.13, calculate...Ch. 11 - For Problem 11.12, calculate the heat loss through...Ch. 11 - For Problem 11.13, calculate the heat loss through...Ch. 11 - Nine old 12 ft2 windows with U=1.2Btuhft2F were...Ch. 11 - For Problem 11.39, calculate the savings in ft3 of...Ch. 11 - A family uses 80 gallons of hot water per day. The...Ch. 11 - For Problem 11.17, determine the thermal...Ch. 11 - Compare heat-transfer rates through layers of...Ch. 11 - Calculate the heat-transfer rate through a 24 ft2...Ch. 11 - Look up the low and high daily temperature values...Ch. 11 - For your town calculate the degree-days for the...Ch. 11 - For a building located in Baltimore, Maryland with...Ch. 11 - For a building located in Boston, Massachusetts...Ch. 11 - For a building located in Detroit, Michigan with...

Find more solutions based on key concepts

Show solutions Redo Problem 2.7 according to the AASHTO system (Table 2.3). 2.7 The particle characteristics of a soil are giv...

Fundamentals of Geotechnical Engineering (MindTap Course List)

Which security protocols are used to protect e-mail?

Principles of Information Security (MindTap Course List)

A composite beam consisting of fiberglass faces and a core of particle board has the cross section shown in the...

Mechanics of Materials (MindTap Course List)

Which of your schools information systems is the worst or most difficult for you to deal with? Describe an idea...

Principles of Information Systems (MindTap Course List)

Create a Crows Foot ERD to include the following business rules for the ProdCo company: a. Each sales represent...

Database Systems: Design, Implementation, & Management

Which of the following would not cause noise while driving in 2WD under a heavy throttle? a. Faulty ignition sw...

Automotive Technology: A Systems Approach (MindTap Course List)

What is structural independence, and why is it important?

Database Systems: Design, Implementation, & Management

If the outside of a 6"-diameter disk is to be milled using a rotary table and a 3/4" diameter endmill, what is ...

Precision Machining Technology (MindTap Course List)

“Spreadsheets, even after careful development, contain errors in 1% or more of all formula cells,” according to...

Fundamentals of Information Systems

Case 1-69 Financial Statement Analysis Agency Rent-A-Car Inc. rents cars to customers whose vehicles are unavai...

Cornerstones of Financial Accounting

The operating system is called the “soul of the computer” because it controls how you enter data into your comp...

Fundamentals of Information Systems

How do you form a simple condition?

A Guide to SQL

Repeat Problem 2.4 with the following data. 2.4 The following are the results of a sieve analysis. a. Determine...

Principles of Geotechnical Engineering (MindTap Course List)

Define an attribute, and provide three examples.

Systems Analysis and Design (Shelly Cashman Series) (MindTap Course List)

A. An object is dropped from a height of 20 feet off the ground. What is its velocity when it hits the ground? ...

Fundamentals of Chemical Engineering Thermodynamics (MindTap Course List)

You turn to the cost estimate and discover that the only two costs associated with the shredder are annualized—...

Solid Waste Engineering

The cantilever beam is built into a wall at O. Neglecting the weight of the beam, determine the support reactio...

International Edition---engineering Mechanics: Statics, 4th Edition

What do selsyns look like?

Electric Motor Control

List the various methods of connecting an electric clothes dryer. ______________________

EBK ELECTRICAL WIRING RESIDENTIAL

What are the characteristics of management based on the method described in the text as the popular approach" t...

Management Of Information Security

Determine the reactions and draw the shear and bending moment diagrams for the beams shown in Figs. P16.1P16.5 ...

Structural Analysis

Compute the nominal flexural strength of the composite beam in Problem 9.1-3. Use Fy=50 ksi.

Steel Design (Activate Learning with these NEW titles from Engineering!)

Define lateral and radial runout.

Automotive Technology

Which type of DoS attack orchestrates an attack using uninfected computers? a. DDoS (Distributed DoS) attack b....

Network+ Guide to Networks (MindTap Course List)

Explain how resolution affects printer quality.

Enhanced Discovering Computers 2017 (Shelly Cashman Series) (MindTap Course List)

Why is it important to find a good welding position?

Welding: Principles and Applications (MindTap Course List)

If your motherboard supports ECC DDR3 memory, can you substitute non-ECC DDR3 memory?

A+ Guide to Hardware (Standalone Book) (MindTap Course List)