×
Log in to StudySoup
Get Full Access to Introduction To Heat Transfer - 6 Edition - Chapter 5 - Problem 5.2
Join StudySoup for FREE
Get Full Access to Introduction To Heat Transfer - 6 Edition - Chapter 5 - Problem 5.2

Already have an account? Login here
×
Reset your password

An electronic device, such as a power transistor mounted

Introduction to Heat Transfer | 6th Edition | ISBN: 9780470501962 | Authors: Theodore L. Bergman ISBN: 9780470501962 111

Solution for problem 5.2 Chapter 5

Introduction to Heat Transfer | 6th Edition

  • Textbook Solutions
  • 2901 Step-by-step solutions solved by professors and subject experts
  • Get 24/7 help from StudySoup virtual teaching assistants
Introduction to Heat Transfer | 6th Edition | ISBN: 9780470501962 | Authors: Theodore L. Bergman

Introduction to Heat Transfer | 6th Edition

4 5 1 406 Reviews
13
2
Problem 5.2

An electronic device, such as a power transistor mounted on a finned heat sink, can be modeled as a spatially isothermal object with internal heat generation and an external convection resistance. (a) Consider such a system of mass M, specific heat c, and surface area As, which is initially in equilibrium with the environment at T. Suddenly, the electronic device is energized such that a constant heat generation (W) occurs. Show that the temperature response of the device is where T T() and T() is the steady-state temperature corresponding to t l ; i Ti T(); Ti initial temperature of device; R thermal resistance ; and C thermal capacitance Mc. (b) An electronic device, which generates 60 W of heat, is mounted on an aluminum heat sink weighing 0.31 kg and reaches a temperature of 100 C in ambient air at 20 C under steady-state conditions. If the device is initially at 20 C, what temperature will it reach 5 min after the power is switched on? 5.

Step-by-Step Solution:
Step 1 of 3

Lecture 14: Thermodynamics Part 2 Objectives  Key concepts o Energy, heat, and work all have the same dimension o Energy is a conserved quantity 1st law of thermodynamics o Energy has quality as well as quantity 2nd law of thermodynamics o Objects like rocks or working fluids have several forms of energy  Internal energy, gravitational potential energy, kinetic energy o Calculate 5 types mechanical energy (work) o Formulate solution strategy by applying 1st law o Identify simple systems that violate the 1st law o Explain the effect of assumptions on the 1st law First law of thermodynamics  Energy can be converted from one form to another, but total ene

Step 2 of 3

Chapter 5, Problem 5.2 is Solved
Step 3 of 3

Textbook: Introduction to Heat Transfer
Edition: 6
Author: Theodore L. Bergman
ISBN: 9780470501962

Other solutions

People also purchased

Related chapters

Unlock Textbook Solution

Enter your email below to unlock your verified solution to:

An electronic device, such as a power transistor mounted