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 Study on the CFD Analysis and Estimation of the Energy Efficiency of Cryogenic Chamber for Extreme Climate Test

극한 환경 시험을 위한 극저온 챔버의 CFD 해석 및 에너지 효율 평가에 관한 연구

  • Kang, Yul-Ho (School of Mechanical Engineering, Pusan National University) ;
  • Kim, Min-Kyu (School of Mechanical Engineering, Pusan National University) ;
  • Park, Warn-Gyu (School of Mechanical Engineering, Pusan National University)
  • Received : 2015.09.30
  • Accepted : 2016.01.14
  • Published : 2016.02.10
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Abstract

There are many types of national and international standards for low temperature tests depending on the products. This study conducted CFD analysis and estimation of the energy efficiency of the chamber both with and without a test object by considering variations of COP and specific volume according to temperature. The supply air was located in the upper area to compare the cooling performance for each location using various outlets in mixed ventilated conditions. For cases without the test object, the air temperature of the upper supply and center extract on the opposite side type chamber cooled faster than other areas by 4.3~29.8%. However, for cases with the test object, the object temperature of the upper supply and lower extract type chamber cooled faster than the other areas by 7.2~31.5%. The cooling efficiency of the air inside the chamber and the test object did not show the same pattern, which indicates the need to consider the cooling performance by not only the air but also the test object in the cryogenic chamber design for testing.

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References

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