Proceedings of the SAREK Conference (대한설비공학회:학술대회논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Optimum design of the Characteristics of Double Stage Evaporator/Absorber for Large temperature Difference Absorption System

냉수 대온도차 흡수식 냉동기용 2단 증발기/ 흡수기 최적 설계

  • Park, Chan-Woo (Chonbuk National University, School of Mechanical Design Engineering) ;
  • Im, Ick-Tae (Chonbuk National University, School of Mechanical Design Engineering) ;
  • Kang, Yong-Tae (School of Mechanical and Industrial System Engineering, Kyung Hee University)
  • 박찬우 (전북대학교 기계설계공학부) ;
  • 임익태 (전북대학교 기계설계공학부) ;
  • 강용태 (경희대학교 기계산업시스템공학부)
  • Published : 2008.11.21
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Abstract

The optimal design of two stage evaporation & absorption system which is related to the large temperature difference system was investigated numerically in the absorption refrigeration system. The concentrations at inlet & oulet of absorber are 62.9% and 56.9%, but in two stage absorption system the values are 62.2% and 56.2%. Therefore strong solution & weak solution became diluted than the standard value. The amount of weak solution circulation can be reduced in absorption refrigeration system, and the sensible heat load is more reduced to enhance the COP of system. As UAR is increased, COP becomes larger, and this means the role of top section is more important than bottom section in two stage evaporation & absorption system. But the increase of COP becomes slower at 0.7 of UAR ratio. The performance of Type2 is higher than Type1 in COP with the flow direction of cooling waters. This phenomena is due to the active absorption of vapor -absorption & lower temp. cooling water is more effective. The pressure at bottom section becomes higher & that at top section becomes lower and therefore the circulation rate can be diminished more.

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