Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Heat Transfer Characteristics of Fin-Tube Heat Exchanger using Two-Port Tube of Small Inner Diameter by Mechanical Expansion

연결세경관을 이용한 휜관형 열교환기의 기계확관에 의한 전열특성

  • Lee, Sangmu (Shizuoka Works, Mitsubishi Electric Corp.) ;
  • Park, Byung-Duck (Department of Automotive Engineering, Kyungpook National University)
  • 이상무 (미쯔비시전기(주) 시즈오까제작소) ;
  • 박병덕 (경북대학교 자동차공학부)
  • Received : 2016.02.02
  • Accepted : 2016.09.18
  • Published : 2016.11.10
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Abstract

The fin and tube heat exchanger using a two-port tube has in air-conditioner heat exchanger because heat transfer performance. This study investigates the feasibility of a fin and tube heat exchanger using two-port copper tube by mechanical expansion. The optimum size of the tube-expanding bullet for the heat exchanger using two-port tube was through numerical calculation. The heat exchanger using a two-port tube was fabricated by mechanical expansion, and the heat exchanger performance was evaluated condensation and evaporation experiments. Compared to the heat exchanger of a conventional circular tube, the pressure drop per unit length of the heat exchanger with a two-port tube decreased. Compared to the heat exchanger using a conventional circular tube, the overall heat transfer coefficient of heat exchanger with a two-port tube increased up to 13% in the case of condensation, and up to 25% in the case of evaporation. The two-port tube heat exchanger outperforms conventional heat exchanger for air conditioner with a inner grooved circular tube.

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References

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