Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Investigation into the Worst Stress Condition for an Accelerated Life Test of a Compressor in Refrigerators - Acceleration Factor and the Reducible Test Time under Low Temperature -

냉장고용 압축기의 가속수명시험을 위한 가혹조건 탐색 - 저온 가혹조건에서의 가속계수와 단축 시험기간 -

  • Jung, Y.M. (Department of Refrigeration and Air-Conditioning Engineering, Pukyong National University) ;
  • Joo, W.J. (Department of Refrigeration and Air-Conditioning Engineering, Pukyong National University) ;
  • Jeong, S.K. (Department of Refrigeration and Air-Conditioning Engineering, Pukyong National University)
  • Received : 2011.12.15
  • Accepted : 2012.01.30
  • Published : 2012.04.30
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Abstract

Generally accelerated life test is well known as one method to reduce reliability qualification test period. This test is conducted under the higher stress condition than normal condition. So it can save the test time by calculating the acceleration factor from the relationship between the worst stress condition and normal condition. This paper investigates the worst stress condition for the accelerated life test to increase the acceleration factor. Especially, we focused on the method to obtain effective acceleration factors under the worst stress condition. Moreover, we considered how to decide the worst stress condition by looking for the operating limit of this system. The acceleration factor can be estimated from the ratio of the kinematic viscosity in the normal condition and the worst stress condition, the lowest temperature, by using Arrhenius relationship. Through some experiments for a refrigerator's compressor, we were able to confirm how to increase acceleration factors and how to reduce the reliability qualification test period with minimum samples.

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References

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