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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Numerical Study on the Pressure Drop and Heat Transfer in the Hot Channel of Plate heat Exchanger with Chevron Shape

쉐브론 형상 판형 열교환기의 고온 채널에서의 압력손실 및 열전달 특성에 관한 해석 연구

  • Sohn, Sangho (Department of Thermal Systems, Korea Institute of Machinery and Materials) ;
  • Shin, Jeong-Heon (Department of Thermal Systems, Korea Institute of Machinery and Materials) ;
  • Kim, Jungchul (Department of Thermal Systems, Korea Institute of Machinery and Materials) ;
  • Yoon, Seok Ho (Department of Thermal Systems, Korea Institute of Machinery and Materials) ;
  • Lee, Kong Hoon (Department of Thermal Systems, Korea Institute of Machinery and Materials)
  • Received : 2017.12.11
  • Accepted : 2018.03.07
  • Published : 2018.04.10
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Abstract

This research investigates the internal flow and heat transfer in a plate heat exchanger with chevron shape by utilizing the computational fluid dynamics (CFD) software. The basic unit of the plate heat exchanger is generally composed of a hot channel, an intermediate chevron plate, and a cold channel. Several studies have reported experimental and numerical simulation of heat transfer and pressure drop. This study focused on the detailed numerical simulation of flow and heat transfer in the complicated chevron shape channel. The long chevron plate was designed to include 16 chevron patterns. For proper mesh resolution, the number of cells was determined after the grid sensitivity test. The working fluid is water, and its properties are defined as a function of temperature. The Reynolds number ranges from 900 to 9,000 in the simulation. A realizable $k-{\varepsilon}$ model and non-equilibrium wall function are properly considered for the turbulent flow. The friction factors and heat transfer coefficient are validated by comparing them with existing empirical correlations, and other patterned flow phenomena are also investigated.

Keywords

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

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