Fluid Flow and Heat Transfer Investigation of Plate-fin Evaporative Condenser based on Fluent
To investigate the flow and heat transfer characteristics of plate-tube evaporative condenser and optimize the structure of concave holes on plate,commercial software Fluent was used in this study to conduct numerical simulations of gas-liquid flow models.By controlling variables and using a layered optimization approach,the effects of different depths(H)and small diameters(D1)of concave holes on the flow and heat transfer efficiency of plate fins under various Reynolds numbers(Re)were investiga-ted.The study found that under all Re conditions,Nusselt number(Nu)increases with the increase of H,and reaches an optimal value at H=3 mm,beyond which it starts to decrease.Once the optimal value of H is determined,the influence of different D,on Nu under all Re conditions exhibits a similar optimal value,with D1=6 mm providing the best heat transfer performance.While higher Re result in better heat transfer performance,they also entail higher energy consumption.Through experimental verification,the numerical simulation results at the optimal dimensions are in good agreement with the experimental re-sults.Therefore,a trade-off between energy consumption and efficiency needs to be considered when determining the optimal structure.
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