Lecture_4.2__Heat_Transfer

Lecture_4.2__Heat_Transfer - AE202 Lecture 1.9 Heat...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
AE202 Name______________________ Lecture 1.9 Heat Transfer Date_______________________ Reading: MEEB 10 th Edition o Chapter 7 o Appendix E Heat Transfer Unit of Measurement - Rate of heat transfer 1. English _________ 2. SI (Watts) Convention o Direction of heat flow Objective o ________________heat transfer by increasing resistance Assumptions 1. 2. Definitions Conductivity (k) Amount of heat (BTU/hr) that flows through: in an hour, one square foot of material, one inch thickness, subjected to one degree temperature difference. Conductance (c) Amount of heat flow for a given thickness of material Resistance (R) Reciprocal of conductance [R=1/c] Resistance per inch (R) Reciprocal of conductivity [R=1/k] R value increases with thickness
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Units Conductivity (k) ________________________ Conductance (c) ________________________ Resistance (R=1/c) ________________________ Resistance per inch (R=1/k) ________________________ Assembly Increase ________________ Decrease _______________ Temperature at the center =
Image of page 2
Assembly - Coefficient of transmission ( U-value ) 0. Number of BTUs flowing through an assembly per 1 ____________ 1 ____________ Assembly - Example R 1 =2 R 2 =3 Air Air film - Surface resistance of air
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern