Question: 1) A composite exterior wall has 3 main layers in series as shown in the figure. The thicknesses of layers are LA-10 mm, La-150

1) A composite exterior wall has 3 main layers in series as

1) A composite exterior wall has 3 main layers in series as shown in the figure. The thicknesses of layers are LA-10 mm, La-150 mm and Le 20 mm. In a cold winter day, indoor and outdoor temperatures are measured as T-22C and T -20C; while indoor and outdoor convective heat transfer coefficients are known to be h-5 W/mK and h,-25 W/mK, respectively. The thermal conductivity of materials are kA-0.7 W/mK. kB 1.3 W/mK and kc 0.5 W/mK. Neglecting the contact surface resistance and assuming steady-state one-dimensional heat transfer; a) Sketch the thermal circuit and find the total thermal resistance per unit area (Ret") (20 pts) b) Determine the total heat flux through the wall (q") (10 pts) e) Find the outer surface temperature (T.)(10 pts) d) If an insulating sheet is added as 4th layer (Layer D) at the outer side, having the properties of LD-10 mm and ko 0.02 W/m K. find the heat flux through the wall for the new case. (10 pts) T -22C 5W-K B 1. T., = -20C A = 25 W/m-K

Step by Step Solution

★★★★★

3.47 Rating (154 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a Critically damped system The steadystate error for a critically damped system can be calculated us... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mechanical Engineering Questions!

Assume that everyone agrees that global warming is both real and caused by humans. Give two major reasons why bargaining in the spirit of Coase is unlikely to resolve the problem of excess carbon...

What's the error in the following code segment? public static double foo(b, t) { double a = 0; if(b >= 1000) a = b * t 0.3; else if(p >= 1000) else a = b * t* 0.4; a = b * t; return a; } Wrong method...

Which marketing communication tool is most effective between Daraz and Pickaboo e commerce site and why?Make a list describing all the different marketing communication tools in detail you see being...

What is One myth of creation and One myth of destruction, explaining how these stories are both similar to each other that's not covered in Intro to Mythology Contemporary Approaches to classical and...

Produce a work breakdown structure for the minor dwelling project plan ( the image files provided) using ms word or another software. The work breakdown structure should have 4 hierarchy levels with...

2. Use the attached psychrometric chart and the figure below answer the following questions. Figure 2.12 Temperature gradient through an exterior wall RSI Wall Component 1 Exterior al im Tacos...

1 - 2017 Submission by 5 pm 4 September 2017 This is a group assignment Instructions 1. A1 is obtained as follows: Take the last three digits of the student number of each group member and divide it...

Please help me make an Executive Summary. Explain what you will examine in the case study. Write an overview of the field you are researching. Make a thesis statement and sum up the results of your...

solve the question The possible existence of an optimum insulation thickness for radial systems is suggested by the presence of competing effects associated with an increase in this thickness. In...

F0 rm 1040 Schedule E Schedule 1 Schedule SE Schedule 2 Form 2441 Schedule 3 Form 4562 Schedule A Schedule 8812 Schedule B Form 8995 Schedule C Qualified Dividends and Capital Gain Tax Worksheet...

Summarize this for me Someone who understand MEA and HEA very well. And please make sure the summary is 2 pages . no less than 2 pages plz thanks Effects of temperature on mechanical properties and...

Consider an individual that consumes two goods (X and Y) and has a Cobb-Douglass Utility Function of the form: U = 8 X.6 Y.4 The individual has income of 100, the price of Good X is 20 and the Price...

For the rod of Prob.7.25, determine the magnitude and location of the maximum bending moment.

Find the horizontal and vertical asymptotes of the curv answers as comma - separated lists. If an answer does y = 2 4 x x 5 x = y = ,

Refer to the Business and Society (March 2011) study on the sustainability behaviors of CPA corporations, Exercise 6.12. Recall that the level of support for corporate sustainability (measured on a...

It costs more to produce defective itemssince they must be scrapped or reworkedthan it does to produce non-defective items. This simple fact suggests that manufacturers should ensure the quality of...

Refer to the Journal of the European Academy of Dermatology and Venereology (June 2010) study of the link between nickel allergies and use of mascara or eye shadow, Exercise 6.58. Recall that two...

J. T. Brooks and Company, a manufacturer of quality handmade walnut bowls, has had a steady growth in sales for the past 5 years. However, increased competition has led Mr. Brooks, the president, to...

CVP analysis, income taxes (CMA, adapted) R. A. Ro and Company, a manufacturer of quality handmade walnut bowls, has had a steady growth in sales for the past five years. However, increased...

Investors using the buy-and-hold technique can earn profits from an increase in stock value and from

There were 820 million pounds of phthalic anhydride produced in the United States in 1995. One of the end uses of phthalic anhydride is in the fiberglass of sailboat hulls. Phthalic anhydride can be...

Go to the LearnChemE screencast link for Chapter 14 (http://www.learncheme.com/screencasts/kinetics-reactor design). View one or more of the screencast 5-to 6-minute videos and write a two-sentence...

Derive an equation for the time necessary to completely burn a 100 m carbon particle as a function of D 0 . Also calculate the burning rate constant. Use the KS values of the parameter values, for...

4. What is the hostile media phenomenon? Describe an example of this phenomenon. How might this phenomenon be avoided or overridden?

2. What are some of the values, beliefs, norms, and worldviews that are important to you? Do you have any sacred values? What about the values, beliefs, norms, and worldviews of your friends?...

2. Have you ever participated in a research study? What was it like? How did your participation affect how you thought scientific knowledge was created?