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 Performance Characteristics in a Welded Plate Heat Exchanger according to Mass flow rate and Temperature

용접식 판형열교환기에서 작동유체의 유량과 온도변화에 따른 성능특성 고찰

  • Ham, Jeonggyun (Department of Mechanical Engineering, Graduate School of Chosun University) ;
  • Kim, Min-Jun (Korea Refrigeration and Air Conditioning Assessment Center) ;
  • An, Sungkook (R&D Center, Samil Co. Ltd) ;
  • Cho, Honghyun (Department of Mechanical Engineering, Chosun University)
  • Received : 2018.10.01
  • Accepted : 2018.11.20
  • Published : 2018.12.01
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Abstract

In this study, the performance characteristics of a welded plate heat exchanger was investigated experimentally. Performance tests were carried out according to the flow rate and inlet temperature of working fluid. As a result, the heat transfer capacity increased by 335.5 kW with an increasing the flow rate and temperature difference between hot and cold side. However, the overall heat transfer coefficient was increased with the increase of flow rate, and it was not effected significantly from inlet temperature difference between hot and cold working fluid. The pressure drop was increased by 55.78 kPa with an increasing the frow rate when the flow rate ratio between hot and cold side 1:1. However, the tendency of pressure drop was difference when flow rate ratio wasn't 1:1. In case that the flow rate ratio between hot and cold side was not 1:1, the pressure drop at the low flow rate side was higher than that when the flow rate ratio was 1:1, while pressure drop of the other side was decreased compared to that when the flow rate ratio was 1:1.

Keywords

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Fig. 1. Schematics of a chevron plate.

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Fig. 2. Schematics and image of the experimental facility.

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Fig. 3. Energy balance between hot and cold side capacity.

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Fig. 4. Heat transfer capacity and overall heat transfer coefficient with flow rate of hot side.

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Fig. 5. Heat transfer capacity and overall heat transfer coefficient with the inlet temperature of the hot side.

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Fig. 6. Pressure drop with the flow rate of the hot side.

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Fig. 7. Comparison of pressure drop between the hot and cold side.

Table 1. Specifications of the welded heat exchanger

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Table 2. Specifications of the welded heat exchanger

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