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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Performance Characteristics of a Regenerative Heat Exchanger Depending on Its Porous Structure

스털링 엔진용 재생 열교환기의 다공체 구조에 따른 성능 특성

  • 신명철 (국민대학교 대학원) ;
  • 안준 (국민대학교 기계시스템공학부) ;
  • 강병하 (국민대학교 기계시스템공학부)
  • Received : 2011.10.20
  • Published : 2012.05.10
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Abstract

Stirling engine is an external combustion engine, whose efficiency approaches that of Carnot engine with the help of a regenerator. The regenerator is a heat exchanger composed of porous medium, whose performance is dependent on the pore structure. Three types of pore structures are considered in the present study. They are wire screen, random wire and composite structure, i.e. a combination of wire screens with different hydraulic diameters. The porosity more highly affects the performance of a regenerator compared to the hydraulic diameter. The random wire can yield high effectiveness even at a high porosity. The composite mesh gives better performance when the hydraulic diameter decreases in the direction from hot side to cold side.

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References

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