Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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Investigation of Flow Distribution Characteristics at the Channel Location according to the Header Shape of Welded Plate Heat Exchanger

용접식 판형열교환기 헤더형상에 따른 채널 위치별 유량 분배 특성 고찰

  • Ham, Jeonggyun (Department of Mechanical Engineering, Graduate School of Chosun University) ;
  • Kim, Eui (Department of Mechanical Engineering, Graduate School of Chosun University) ;
  • An, Sungkook (R&D Center, Samil Co. Ltd.) ;
  • Cho, Honghyun (Department of Mechanical Engineering, Chosun University)
  • Received : 2019.08.03
  • Accepted : 2019.08.28
  • Published : 2019.09.01
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Abstract

To improve the flow distribution at channel locations in the welded plate heat exchanger with "L"-type inflow, the flow visualization of Model 1 was carried out. Besides, the characteristics of flow distribution was investigated experimentally according to the header shape. The inlet flow rate for each channel location was increased at the side channels but decreased at the central channels. In the case of Model 2, which has a slant structure added to the basic header of Model 1, the unevenness of inlet flow increased by 23% from 0.019 to 0.023 as compared to Model 1. On the other hand, Model 3, which has a baffle structure added to Model 2, showed 0.064 unevenness in inlet flow, which was a 36% reduction one compared to Model 1. To improve the distribution at each channel in the welded plate heat exchanger with "L"-type flow, it is necessary to improve the header external shape for the guide of flow as well as the baffle structure for reduction of vortex flow.

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References

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