酒窝型板式换热器流动换热特性分析及优化
Analysis and optimization of flow and heat transfer characteristics of dimple plate heat exchangers
摘要：
以某公司实际使用的板式换热器为研究基础,对其强化结构(酒窝)分别增加了局部突起和长条突起,设计了2种改进板片,对其换热效果进行了模拟分析,并采用等泵功下性能评价指标作为衡量换热效果的指标。结果显示:2种改进板片的性能评价指标分别为1.09和1.10,均可达到较好的换热强化作用,其中增加长条突起的改进板片2可以在压降几乎不变的基础上将换热系数提高10.94%。
Abstract：
Based on the research of a plate heat exchanger actually used in a company, this paper adds local protrusions and long protrusions to its reinforcement structure (dimple), respectively, designs two kinds of improved plates, and uses the performance evaluation criteria under equal pump power as an index to evaluate the heat transfer performance. The results show that the performance evaluation criteria of the two improved plates are 1.09 and 1.10, respectively, and they can achieve better heat transfer enhancement. The improved plate 2 with long protrusions can increase the heat transfer coefficient by 10.94% on the basis of almost unchanged pressure drop.
Keywords:heat exchanger; dimple; structural optimization; improved plate; heat transfer enhancement; performance evaluation criteria