Waiting
Login-Verarbeitung ...

Trial ends in Request Full Access Tell Your Colleague About Jove

18.13: Conduction, Convection and Radiation: Problem Solving

TABLE OF
CONTENTS
JoVE Core
Physics

Ein Abonnement für JoVE ist erforderlich, um diesen Inhalt ansehen zu können. Melden Sie sich an oder starten Sie Ihre kostenlose Testversion.

Education
Conduction, Convection and Radiation: Problem Solving
 
TRANSCRIPT

18.13: Conduction, Convection and Radiation: Problem Solving

There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.

In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could be conduction, convection, radiation, or all three of them. The second step is to identify and write down the unknown quantities in the problem. A list can be prepared of what is given or what can be inferred from the problem as stated, i.e., the known quantities, followed by solving the appropriate equation for the quantity to be determined.

For heat transfer through conduction, the following equation should be used.

Equation1

For convection, the rate of heat loss depends on the temperature gradient, surface area, and heat transfer coefficient.

Equation2

The following equation gives the net heat transfer rate for radiation.

Equation3

Substituting the known quantities along with their units into the appropriate equation and solving it numerically gives the correct solution.


Suggested Reading

Tags

Conduction Convection Radiation Heat Transfer Problem Solving Temperature Difference Equations Unknown Quantities Known Quantities

Get cutting-edge science videos from JoVE sent straight to your inbox every month.

Waiting X
Simple Hit Counter