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Study on the Characteristics of Channel Flow in Plate Heat Exchanger
Z. H. Jin(김진화 ),M. K. Ji(지명국 ),K. S. Lee(이광성 ),C. P. Kim(김철표 ),H. S. Chung(정한식 ),H. M. Jeong (정효민 ) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
In this paper, presented pressure drop characteristics in a channel of plate heat exchanger by experimental method. Plate Heat Exchanger(PHE) have become popular in chemical, power, food and refrigeration industries due to the efficient heat transfer performances, extremely compact design and flexibility of extend or modify to suit changed duty. In the experiment, test section constructed by two corrugated plates with 60 degree of chevron angle. Consequently, experiments carried out the pressure profile along 15 measure points according to mass flow rate. This results provided to investigate flow characteristics of PHE channel flow that highly turbulent even with low Reynolds number. Moreover, numerical simulation was compared with experimental results and present flow behavior in the test section.
이경환 (G. H. Lee ),라흐만 (M. Sq. Rahman ),김철표 (C. P. Kim ),정태휘 (T. W. Joung ),정효민(H. M. Jeong),정한식 (H. S. Chung ) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
Numerical analysis information of a complex discharge-passage will be very useful to improve hydrogen compression system. General information about an internal gas flow is presented by numerical analysis approach. Relating with hydrogen compressing system, which have an important role in hydrogen energy utilization, this should be a useful tool to observe the flow quickly and clearly. Flow characteristic analysis, including pressure and turbulence kinetic energy distribution of hydrogen gas from cylinder going to the chamber of a reciprocating compressor are presented in this paper. Discharge-passage model is designed based on real model of hydrogen compressor. Pressure boundary conditions are applied considering the real condition of operating system. The result shows pressure and turbulence kinetic energy are not distributed uniformly along the passage of the hydrogen compressing system. Path line or particles tracks help to demonstrate flow characteristics inside the passage. The existence of vortices and flow direction can be precisely predicted. Based on this result, the design improvement should be done. Consequently, development of the better hydrogen compressing system will be achieved.