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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Studies on the Performance Variation of a Variable Speed Vapor Compression System under Fault and Its Detection and Diagnosis

가변속 증기압축 냉동시스템에서 고장시의 성능변화와 고장 감지 및 진단에 관한 연구

  • Kim Minsung (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim Min Soo (School of Mechanical and Aerospace Engineering, Seoul National University)
  • 김민성 (서울대학교 기계항공공학부) ;
  • 김민수 (서울대학교 기계항공공학부)
  • Published : 2005.01.01
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Abstract

An experimental study has been peformed to develop a scheme for fault detection and diagnosis(FDD) in a vapor compression refrigeration system. This study is to analyze fault effect on the system performance and to find efficient diagnosis rules for easy determination of abnormal system operation. The refrigeration system was operated with a variable speed compressor to modulate cooling capacity. The FDD system was designed to consider transient load conditions. Four major faults were considered, and each fault was detected over wide operating load range by separating the system response to the load change. Rule-based method was used to diagnose and classify the system faults. From the experimental results, COP degradation due to the faults in a variable speed system is severer than that in a constant speed system. The method developed in this study can be used in the fault detection of refrigeration systems with a variable speed compressor.

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References

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