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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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The Effect of a Manifold in a Storage Tank Applied to a Solar Combisystem

태양열 콤비시스템의 축열조에 적용되는 분배기의 효과

  • Son, Hyo Seok (Graduate School, Department of Mechanical Engineering, Kyung Hee University) ;
  • Hong, Hiki (Department of Mechanical Engineering, Kyung Hee University)
  • 손효석 (경희대학교 기계공학과 대학원) ;
  • 홍희기 (경희대학교 기계공학과)
  • Received : 2013.12.02
  • Accepted : 2014.05.12
  • Published : 2014.07.10
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Abstract

Return piping is used in a solar combi-system for heating and hot water supply. When the temperature of the lower side of a storage tank is low due to hot water usage, the returned hot water after heating is mixed with the lower side cold water of the tank, and the useful energy is reduced. We studied the degree of thermal stratification in the tank, using either a diffuser or a manifold to prevent mixing. Using the diffuser, mixing starts from the bottom of the storage tank. On the other hand, the manifold has the marked effect of preventing mixing. As a result of experiments with changing the diameter and number of holes in the manifold, the optimum condition is 8.5 mm diameter and 96 holes, under the condition of 0.3 lpm.

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References

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