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...Chapter six heat exchangers are devices that facilitate the exchange of between two fluids at different temperatures while keeping them from mixing with each other commonly used in practice a wide range applications heating and air conditioning systems household to chemical processing power production large plants differ chambers they do not allow involved mix car radiator for example is transferred hot water flowing through tubes closely spaced thin plates outside attached transfer exchanger usually involves convection fluid conduction wall separating types require hardware configurations equipment one most important these simplest type consists concentric pipes diameters as shown figure called double pipe flows smaller annular space flow arrangement possible according directions namely parallel counter regimes associated temperature profiles both cold enter same end move direction on hand opposite ends another which specifically designed realize surface area per unit volume compact e...