- Title : Plant Engineers & Managers Guide 06 by Albert Thumann, P.E., C.E.M.
- Publish : Marcel Dekker, Inc New York and Basel
- Type Document : pdf
- Release : December 2002
- Total Page : 21 page
- Size : 0.46 Mb
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Decrypted Contents
Heat Transfer
THE IMPORTANCE OF UNDERSTANDING THE PRINCIPLES OF HEAT TRANSFER
The principles of heat transfer are the fundamental building blocks needed to understand how heat losses occur and how they can be minimized. Heat transfer finds application in equipment sizing as well. For instance, a heat exchanger is used to transfer heat from one fluid to another. Thus, heat transfer applications are involved with energy transfer in equipment, piping systems, and building. In Chapter 7, heat transfer applications to building design will be presented. In this chapter, you will learn three modes of heat transfer, see how much energy is lost from uninsulated tanks and pipes, and discover how to use economic insulation thickness tables to reduce heat losses.
THE IMPORTANCE OF UNDERSTANDING THE PRINCIPLES OF HEAT TRANSFER
The principles of heat transfer are the fundamental building blocks needed to understand how heat losses occur and how they can be minimized. Heat transfer finds application in equipment sizing as well. For instance, a heat exchanger is used to transfer heat from one fluid to another. Thus, heat transfer applications are involved with energy transfer in equipment, piping systems, and building. In Chapter 7, heat transfer applications to building design will be presented. In this chapter, you will learn three modes of heat transfer, see how much energy is lost from uninsulated tanks and pipes, and discover how to use economic insulation thickness tables to reduce heat losses.
THREE WAYS HEAT IS TRANSFERRED
Heat transfer is determined by the effects of conduction, radiation and convection. The three modes can be thought of simply as follows:
Conduction—Heat transfer is based on one space surrendering heat while another one gains it by the ability of the dividing surface to conduct heat.
Radiation—Heat transfer is based on the properties of light, where no surface or fluid is needed to carry heat from one object to another.
Convection—Heat transfer is based on the exchange of heat between a fluid, gas, or liquid as it transverses a conducting surface.
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