(b) Consider the walls of a house of area 400 m with a 10 cm gap...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
(b) Consider the walls of a house of area 400 m with a 10 cm gap between the inside wall at 20C and the outside wall at -10C. Assume that the gap is filled with air and take the cross sectional area of an "air molecule" as 0.42 nm, the molecular weight as 28.8 g mol- and the heat capacity as Cvm - 2.5 R. [8] Calculate K of air at the average temperature in the wall. (a) [6] The actual value of value of k is 1.5 times higher than the theoretical one due to air currents in the walls. On this basis calculate the heat loss (kJ/day) through the walls. [6] Now, suppose the gap is filled with insulation which has a thermal conductivity of 0.046 J m's K-. Calculate the heat loss (kJ/day) through 400 m of wall with this 10 cm thick insulation. (b) Consider the walls of a house of area 400 m with a 10 cm gap between the inside wall at 20C and the outside wall at -10C. Assume that the gap is filled with air and take the cross sectional area of an "air molecule" as 0.42 nm, the molecular weight as 28.8 g mol- and the heat capacity as Cvm - 2.5 R. [8] Calculate K of air at the average temperature in the wall. (a) [6] The actual value of value of k is 1.5 times higher than the theoretical one due to air currents in the walls. On this basis calculate the heat loss (kJ/day) through the walls. [6] Now, suppose the gap is filled with insulation which has a thermal conductivity of 0.046 J m's K-. Calculate the heat loss (kJ/day) through 400 m of wall with this 10 cm thick insulation.
Expert Answer:
Answer rating: 100% (QA)
a Calculate k of air at the average temperature in the wall Given Crosssectional area of an air mole... View the full answer
Related Book For
Materials Science and Engineering An Introduction
ISBN: 978-0470419977
8th edition
Authors: William D. Callister Jr., David G. Rethwisch
Posted Date:
Students also viewed these physics questions
-
Question: USE JAVA LANGUAGE. Assignment ≫ Distance Converter Your Assignment Is To Create A Distance Conversion App As Described
-
Managing Scope Changes Case Study Scope changes on a project can occur regardless of how well the project is planned or executed. Scope changes can be the result of something that was omitted during...
-
a. Example 13-1: Batch Reactor with an Exothermic Reaction Wolfram 1. Adiabatic Case: Use Wolfram to see whether you can find a trajectory that is ready to ignite and whose trajectory looks like a...
-
How can we measure a security's contribution to the risk of the market portfolio?
-
Give the hypothesis and the conclusion in each statement. (a) I will run a marathon only if Amy watches my dogs. (b) In order for a student to pass the course, it is sufficient that they earn a B....
-
The following percentages apply to Thornton Company for 2018 and 2019: ___________________________________________2019 2018 Sales............................................................
-
Simpson Manufacturing Company has four operating divisions. During the first quarter of 2002, the company reported aggregate income from operations of $120,000 and the following divisional results....
-
Ken Johnston, the data processing manager for Stanley Morgan Bank, is planning a project to install a new management information system. He now is ready to start the project, and wishes to finish in...
-
Prepare a cash flow statement for DEWA based on the following information for the year ended December 31, 2023: Cash Flows Amount (AED) Cash from Operations 2,000,000 Cash from Investments (500,000)...
-
Consider the following costs for a certain chemical product: Fixed cost: $2.045 million/year. Variable costs: Material cost: 62 cents per gallon of product. Energy cost: 24 cents per gallon of...
-
Been working on this for days after going over all lessons and cannot figure out Task 2 and 3. This is JavaScript. I have this for task 1: class Student { constructor(name, email, community) {...
-
What do you think is the application of abnormal psychology in the following field of study a. Industry/Business/Private Institution b. School Setting c. Government entity 2. How abnormal psychology...
-
Psychology is made of different branches. Explain Abnormal psychology as a branch of psychology.
-
Identify the formulas for the following: FC, VC, TC, MC, AFC, AVC, ATC. Fill out the table, round to integers (no decimal places) Output FC VC TC MC AFC AVC ATC 0 1 2 3 4 5 6 7 8 9 8165 10 50 100 25...
-
2. In the country of SpringNow, the public is holding a total of $2,000. Total lending in the banking sector, which has 5 identical banks, is $30,000. The currency deposit ratio is 5%. (a) Describe...
-
Select one topic from abnormal psychology that helped change your understanding. Explain your previous knowledge of this concept and how this course has helped you to see this concept in new ways. ...
-
Assume that a U.S. based investor began applying a carry tradestrategy by borrowing in the U.S. and investing in Turkey, as ofNovember 2022. The corresponding interest rates are 3% in the U.S.and 3 2...
-
If M = 7, s = 2, and X = 9.5, what is z?
-
Following is tabulated data that were gathered from a series of Charpy impact tests on a ductile cast iron. (a) Plot the data as impact energy versus temperature. (b) Determine a ductile-to-brittle...
-
(a) Briefly describe a twin and a twin boundary. (b) Cite the difference between mechanical and annealing twins.
-
A bar of an iron-silicon alloy having the B-H behavior shown in Figure 20.29 is inserted within a coil of wire 0.20 m long and having 60 turns, through which passes a current of 0.1 A. (a) What is...
-
United Limited, a company that manufactures sporting equipment and accessories, owns a number of properties, which are listed below: 1. Trafford Lane: a freehold factory and office block used...
-
Helix Limited (Helix) purchased three identical properties (Right, Left and Up), and leased a fourth (Down), which has been classified as a right-of-use asset in accordance with IFRS 16 Leases,...
-
What are the principal accounting and disclosure differences between IAS 40 and FRS 102, Section 16?
Study smarter with the SolutionInn App