Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Experimental Study of a Recuperator with Offset Strip Fins

오프셋 스트립 휜을 가지는 리큐퍼레이터에 대한 실험적 연구

  • Kim, Taehoon (Dept. of Plant Safety Technology, Korea Institute of Machinery and Materials (KIMM)) ;
  • Do, Kyu Hyung (Dept. of Plant Safety Technology, Korea Institute of Machinery and Materials (KIMM)) ;
  • Han, Yong-Shik (Dept. of Plant Safety Technology, Korea Institute of Machinery and Materials (KIMM)) ;
  • Choi, Byung-Il (Dept. of Plant Safety Technology, Korea Institute of Machinery and Materials (KIMM)) ;
  • Kim, Myungbae (Dept. of Plant Safety Technology, Korea Institute of Machinery and Materials (KIMM))
  • 김태훈 (한국기계연구원 에너지플랜트안전연구실) ;
  • 도규형 (한국기계연구원 에너지플랜트안전연구실) ;
  • 한용식 (한국기계연구원 에너지플랜트안전연구실) ;
  • 최병일 (한국기계연구원 에너지플랜트안전연구실) ;
  • 김명배 (한국기계연구원 에너지플랜트안전연구실)
  • Received : 2014.10.30
  • Accepted : 2015.03.11
  • Published : 2015.06.30
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Abstract

In the present study, a recuperator to improve the thermal efficiency of a micro gas turbine is considered. The counter flow plate-fin heat exchanger with offset strip fins is chosen as the type of the recuperator. From the optimization study as varying design parameters of the recuperator determined from the ideal cycle analysis, the internal structure of the recuperator is determined. The recuperator is made from stainless steel 304. In order to evaluate performance of the recuperator, experimental investigation is performed. The effects of inlet temperature of hot-side of the recuperator on the thermal performance of the recuperator are investigated. As a result, effectiveness of the recuperator obtained from the experiments is well consistent with that obtained from the correlations.

본 연구에서는 가스 터빈의 효율을 증대시키는데 사용되는 리큐퍼레이터의 성능에 대한 실험적 연구를 수행하였다. 본 연구에서 채택한 리큐퍼레이터는 오프셋 스트립 휜을 가지는 대항류 열교환기이다. 기존에 제시된 상관식 및 이상상태 사이클 해석을 통하여 최적화된 리큐퍼레이터의 형상을 결정하였다. 리큐퍼레이터의 성능을 평가하기 위해 실험연구를 수행하였다. 특히 리큐퍼레이터의 고온부 입구 온도를 변화시키면서 실험을 수행하였다. 또한 실험 결과를 기존에 제시되어 있던 상관식들과 비교를 하였다. 그 결과 압력강하는 실험결과와 상관식이 잘 맞지 않았지만 유용도는 실험결과와 상관식이 잘 일치하는 것을 확인하였다.

Keywords

References

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