Abstract
Baffles with holes in different diameters (or HDD baffles) and conically-corrugated tubes are respectively longitudinal flow baffle and high-efficiency heat exchange tubes proposed by the author. In this paper, vibrations of tube bundles with HDD baffles and fluid flow as well as heat transfer inside conically-corrugated tubes were numerically simulated, and the heat exchanger with conically-corrugated tubes and HDD baffles was tested for the heat transfer efficiency. It is found that compared with the traditional segmental baffles, tube bundle vibrations in heat exchangers, if using the HDD baffles, can be significantly reduced. Regarding heat transfer efficiency, conically-corrugated tubes are much better than smooth tubes and even better than other high-efficiency heat transfer tubes. Compared with the traditional heat exchangers, heat exchangers constructed with conically-corrugated tubes and the HDD baffles can provide better heat transfer efficiency and less tube bundle vibration.
Highlights
Behavior of the Heat Exchanger withShell and tube heat exchangers are widely used in the petrochemical industry, manufacturing industry, power production, and energy-saving system because of their simple structure, low cost, and strong design adaptability [1,2,3,4]
The shell-side fluid of the traditional segmental baffle heat exchanger flows transversely perpendicular to the tube bundle under the guidance of the segmental baffle, forming a heat transfer dead zone near the baffle [5]
Maakoul et al [19] compared the effects of trefoil-hole, helical and segmental baffles on fluid flow and heat transfer in the shell side of shell and tube heat exchanger through numerical simulation
Summary
Shell and tube heat exchangers are widely used in the petrochemical industry, manufacturing industry, power production, and energy-saving system because of their simple structure, low cost, and strong design adaptability [1,2,3,4]. Studied the flow-induced vibration response of the shell side of a heat exchanger and the heat transfer characteristics of elastic tube bundles by a two-way fluid-structure coupling method. Maakoul et al [19] compared the effects of trefoil-hole, helical and segmental baffles on fluid flow and heat transfer in the shell side of shell and tube heat exchanger through numerical simulation. Ma et al [20] compared and studied the shell-side fluid flow and heat transfer performance of trefoil-hole and quatrefoil-hole baffle heat exchangers through numerical simulation. There are few systematic studies on the vibration analysis of heat exchangers with HDD baffle and the fluid flow and heat transfer performance inside the conically-corrugated tubes. Experiments will be carried to study the heat transfer behavior in the equipment to find its advantages over the traditional heat exchanger
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