| NUMERICAL STUDY ON FLOW DISTRIBUTION IN PLATE-FIN HEAT EXCHANGERS |
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| 作者姓名： | 张哲 厉彦忠 |
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| 作者单位： | Institution of Refrigeration and Cryogenics，Xi’an Jiaotong University，Institution of Refrigeration and Cryogenics，Xi’an Jiaotong University Xi’an 710049，China，Xi’an 710049，China |
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| 基金项目： | ThisworkwassupportedbytheDoctoralFoundationofXianJiaotongUniversity(DFXJTU2 0 0 2 - 1 2 ) |
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| 摘 要： | Inthethermodynamicdesignofplate finheatexchangers,itisgenerallyassumedthattheinletfluidisuniformlydividedamongallthe parallelpassagesinthewholeexchangercore .Inpractice ,however,flowmaldistributionexistspossiblybe causeoftheimproperstructure,imperfectdesign ,andflow passages1 ] .Forplate finheatexchangers ,theflowmaldistributionnotonlycanresultinanobviousreductioninthemechanicalperformance ,butalsocauseasignificantdeteriorationofthether malperformance .Therefore ,theflowmaldistribu tionhasbec…
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NUMERICAL STUDY ON FLOW DISTRIBUTION IN PLATE-FIN HEAT EXCHANGERS |
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| Abstract: | Objective To investigate the flow distribution in plate fin heat exchangers and optimize the design of header configuration for plate fin heat exchangers. Methods A mathematical model of header was proposed. The effects of the header configuration on the flow distribution in plate fin heat exchangers were investigated by CFD. The second header configuration with a two stage distributing structure was brought forward to improve the performance of flow distribution. Results It is found that the flow maldistribution is very serious in the direction of header length for the conventional header used in industry. The numerical predictions indicate that the improved header configurations can effectively improve the performance of flow distribution in plate fin heat exchangers. Conclusion The numerical simulation confirms that CFD should be a suitable tool for predicting the flow distribution. The method has a wide variety of applications in the design of plate fin heat exchangers. |
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| Keywords: | plate fin heat exchanger flow distribution header configuration CFD |
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