Proceedings of the Korean Society of Marine Engineers Conference (한국마린엔지니어링학회:학술대회논문집)

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Experimental Investigation of Heat Transfer in Absorber with Small Diameter Tube

  • Phan Thanh Tong (Graduate School, Department of Refrigeration and Air-conditioning Engineering, Pukyong National University) ;
  • Moon Choon-Geun (University of Auckland) ;
  • Kim Jae-Dol (Department of Environment and Equipment Engineering, Tongmyong University) ;
  • Yoon Jung-In (School of Mechanical Engineering, Pukyong National University)
  • Published : 2006.06.22
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Abstract

The effect of tube diameter on heat transfer characteristics of absorber in absorption chiller/heater using LiBr solution as a working fluid has been investigated by experimental study to develop a high performance and compact absorber. A system Includes a tube absorber, a generator, solution distribution system and cooling water system was set up. The diameter of the heat exchanger tube inside absorber was changed from 15.88mm to 12.7mm and 9.52mm. The experimental results show that the heat transfer coefficient, Nusselt number and heat flux increase as solution flow rate and cooling water flow rate increase. The heat transfer performance increases as tube diameter decreases. Among three different tube diameters, the smallest tube diameter 9.52mm has highest heat transfer performance. A comparison of the heat transfer coefficient obtained by the present study with those of previous experimental results showed good overall agreement.

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