Abstract
This chapter provides an overview of how different heat exchanger types, problems, and networks are analyzed. Heat exchangers are categorized by shape, flow arrangement, area to volume ratio, and channel size. The problem type depends on what information is available and what is sought. The heat exchanger networks can be arranged in numerous ways. For analyzing heat exchangers, three methods, LMTD correction factor, ε-NTU, and heat exchanger efficiency, are reviewed in this chapter. In their basic form, all three methods are based on the first law of thermodynamics, using average fluid properties and transversally averaged temperature, considering only axial temperature change. Since all three methods use the same equations and are based on the same assumptions, they differ only in the way that the results are presented. Historically, the choice of the method used depended on the type of problem under consideration; however using computers and equations solvers, each of the methods can be used to solve any heat exchanger problem, as long as the expressions for LMTD correction factors, ε-NTU relations, or the heat exchanger efficiency expressions are available. The chapter also provides an overview of the compact heat exchangers as well as microchannel heat exchangers.
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Fakheri, A. (2018). Heat Exchanger Fundamentals: Analysis and Theory of Design. In: Handbook of Thermal Science and Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-26695-4_19
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DOI: https://doi.org/10.1007/978-3-319-26695-4_19
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