Research On Heat Transfer Performance And Structural Optimization Of Plate-Shell Heat Exchanger

The plate-shell heat exchanger is more widely used in the petrochemical industry withhigh heat transfer efficiency and good bearing performance. In this paper, Fluent is used tosimulate the plate side and shell side of plate-shell heat exchanger with water. For the plateside, investigates the effect of honeycomb height (H), honeycomb interval (L), welding spotdiameter (D) and welding spot arrangement on heat transfer and pressure drop performance,and compares with four different types of plates. For the shell side, investigates the effect ofbaffle setting, baffle spacing, the placement of plate beam and the cross section of plate beamon heat transfer and pressure drop performance. The accuracy of numerical simulation isverified by comparing with the results of the relevant literature. The main conclusions of thispaper are as follows：(1) Comparing with four different types of plates, the honeycomb plate has the bestoverall performance, andηis respectively higher than flat plate, corrugated board andbubble plate by24.31%,40.48%and50.27%.(2) The heat transfer coefficient and pressure drop of triangular arrangement is higherthan that of rhombus arrangement by12.54%and16.15%, is respectively higher than that ofsquare arrangement by48.57%and37.06%. The overall performance of rhombusarrangement is respectively higher than that of triangular arrangement and square arrangementby1.39%and5.27%.(3) H is the most important factor to affect the heat transfer performance, pressure dropperformance and overall performance, followed by L and D is not obvious. Bigger H, smallerD and bigger L can obtain the best overall performance. The best overall performance ishoneycomb plate3in orthogonal experimental design.(4) According to the results of numerical simulation, the correlation Nu and f ofhoneycomb plate are made.(5) Baffle setting in plate-shell heat exchanger has better effect on heat transfer andpressure drop performance, while baffle spacing has less effect. For the placement of platebeam, the heat transfer coefficient, pressure drop and the overall performance of verticalplacement is respectively higher than that of horizontal placement by4.31%,27.16%and43.25%. For the cross section of plate beam, the heat transfer coefficient, pressure drop andthe overall performance of circular cross-section is respectively higher than that of squarecross-section by37.57%,18%and15.59%.