| The intensification of heat transfer in the shell and tube heat exchanger, widely usedas a general-purpose equipment in the industrial field, has become a hot issue of the study.To improve the heat transfer, measures can be taken in both shell-side and tube-side. Theeffectiveness is greatly enhanced while the heat transfer coefficient in shell-side isincreased. At present, there are two major directions to enhance the heat transfer: modifythe heat transfer surface or use supporting structure in shell-side, both through increasingfluid perturbation and destructing the boundary layer.This paper reviewed the research progress of the heat transfer enhancement inshell-side, detailed in the development of the supporting structure in shell-side. Then, aexperimental study was taken on a new type supporting structure-Heat Exchanger withTriporate Full Circular Supporting Structures, and the shell-side heat transfer criteriarelationship was founded through linear fitting method, in the range of experimentalReynolds numbers. At the same time, from the comprehensive evaluation index h/Δpcompare, it found that the heat transfer performance was much more better than thetraditional baffle plate heat exchanger,3to4times higher in the same Reynolds numbers.Based on the experiment, Paper taken the simulation study with element model ondiffident support plate spacing (300mm,350mm,400mm,450mm,500mm). On the onehand, analyze the strengthening mechanism according to its temperature and flowdistribution; the other hand, form analyzing the results of the simulation study, thefollowing conclusions is found: with the support plate spacing increased, the heat transferperformance and the comprehensive evaluation index (h/Δp) gradually increased.However, taking into account the heat exchange tube support stiffness, strength andvibration problems, the space can’t be the greater the better.Finally, this paper summarized the major work, and made views of further research. |
PDF Full Text Request