Numerical Study on Flow Boiling in Convex Plate Heat Exchangers
This article uses fluent simulation software to numerically simulate the flow boiling heat transfer mechanism on the water side of a convex plate heat exchanger.The research shows that flow boiling heat transfer is accompanied by the formation,growth,merging,and rupture of steam bubbles;The boiling heat transfer coefficient increases with the increase of inlet flow rate,with the optimal flow rate of 0.125m/s,which is 96.6%-102.3%higher than the minimum flow rate.However,with the increase of flow rate,the gas content has significantly decreased.To obtain more steam,it is necessary to reduce the flow rate,and also consider the drying phenomenon at the end of the convex plate heat exchanger to prevent heat transfer deterioration;When the distance between convex plates is 18mm,the flow boiling heat transfer coefficient is the best.
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