Chapter 5 Heat Exchangers - engr.mun.ca

Chapter 5 heat IntroductionHeat Exchangers are devices used to transfer heat between two ormore fluid streamsat different temperatures. heat Exchangers find widespread use in power generation,chemical processing, electronics cooling, air-conditioning, refrigeration, and automo-tive applications. In this Chapter we will examine the basic theory of heat exchangersand consider many applications. In addition, we will examine various aspects of heatexchanger design and heat exchanger ClassificationDue to the large number of heat exchanger configurations, a classification systemwas devised based upon the basic operation, construction, heat transfer, and flowarrangements. The following classification as outlined by Kakacand Liu (1998) willbe discussed: Recuperators and regenerators Transfer processes: direct contact or indirect contact Geometry of construction: tubes, plates, and extended surfaces heat transfer mechanisms: single phase or two phase flow Flow Arrangement: parallel flow, counter flow, or cross flowFigure 1 shows a more comprehensive classification using these basic Equipment and heat exchanger Design MethodsThe go

Heat Exchangers 73 individual thermal resistances of the system. Combining each of these resistances in series gives: 1 UA = 1 (ηohA)i 1 Skw 1 (ηohA)o (5.7) where η0 is the surface efficiency of inner and outer surfaces, h is the heat transfer coefficients for the …

Tags:

  Chapter, Heat, Exchanger, Heat exchangers

Information

Related search queries