Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

An Experimental Study on Beat and Mass Transfer Characteristics of Helical Absorber

헬리컬 흡수기의 열ㆍ물질전달 특성에 관한 실험적 연구

  • 권오경 (한국생산기술연구원 청정설계기술팀) ;
  • 윤재호 (한국생산기술연구원 청정설계기술팀) ;
  • 윤정인 (부경대학교 기계공학부)
  • Published : 2004.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, heat and mass transfer characteristics of five components solution (LiBr＋Lil＋LiNO$_3$＋LiCl＋$H_2O$) which could be substituted for commonly used LiBr solution are tested using a helical absorber. The arrangement of helical-typed heat exchangers allows to make the system more compact as compared to conventional one. The effects of experimental parameters, such as the solution flow rate, cooling water, solution temperature, solution concentration and surfactant have been investigated in view of the heat and mass transfer. The results of the experiment of heat and mass transfer performance show that five components solution should have 2％ higher concentration fur equal absorption capacity of LiBr solution. But considering that five components solution have higher solubility than LiBr solution about 4％ high concentration, five components solution could be applied to a small sized water cooled or air cooled absorption chiller/heater. The increase of heat and mass transfer coefficient by surfactant addition is about 25∼30％ and 23∼40％ respectively.

Keywords

References

  1. Oh-Kyung Kwon, Jung-In Yoon, 1999, 'Heat and Mass Transfer of Helical Absorber on Household Absorption Chiller/heater,' Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 11, No 5, pp. 570-578
  2. Won-Sil Seol, Oh-Kyung Kwon, Choon-Geun Moon, Jung-In Yoon, 2000, 'Heat Transfer Enhancement with Surfactants in Horizontal Bundle Tubes on Absorber,' Transactions of the KSME, Vol. 24, No.8, pp. 1097-1103
  3. Hoffmann, L, I. Greiter, A. Wagner, V. Weisss and G. Alefeld, 1996, 'Experimental Investigation of Heat Transfer in a Horizontal Tube Falling Film Absorber with Aqueous Solutions of LiBr with and Without Surfactants,' International Journal of Refrigeration, Vol. 19, No.5, pp. 331-341 https://doi.org/10.1016/S0140-7007(96)00026-6
  4. Jung-In Yoon, Oh-Kyung Kwon, 1999, 'Cycle Analysis of Air-Cooled Absorption Chiller using a New Working Solution,' Energy - The International Journal, Vol. 24, No.9, pp. 795-809 https://doi.org/10.1016/S0360-5442(99)00038-9
  5. Oh-Kyung Kwon, Choon-Geun Moon, Jung-In Yoon, 1999, 'Cycle Analysis of Air-Cooled Double-Effect Absorption Cooling System Using $H_20/LiBr+HO(CH_2)_30H$,' Transactions of the KSME, Vol. 23, No.2, pp. 272-280
  6. Oh-Kyung Kwon, Jong-Keuk Lim, Jung-In Yoon, Seon-Chang Kim, Jae-Ho Yun, 2000, 'Analysis of Heat and Mass Transfer on Helical Absorber,' Transactions of the KSME, Vol. 24, No. 11, pp. 1428-1436
  7. H.R.Lee, K.K.Koo, S.Jeong, J.S.Kim, H.Lee, Y.S. Oh, D.R.Park and Y.S.Baek, 2000, 'Thermodynamic Design Data and Performance Evaluation of the Water+lithium Bromide+lithium iodide+lithium Nitrate+lithium Chloride System for Absorption Chiller,' Applied Thermal Engineering, Vol. 20, pp. 707-720 https://doi.org/10.1016/S1359-4311(99)00059-9
  8. McNeely, L. A., 1979, 'Thermodynamic Properties of Aqueous Solution of Lithium Bromide,' ASHRAE Transactions, Vol. 85, Pt. 1, pp. 413-434
  9. S.M.Yang, 1987, Heat transfer, 2nd ed., Higher Education Press, Beijing, p. 203
  10. Kashiwagi. T., 1985, 'The Activity of Surfactant in High-Performance Absorber and Absorption Enhancement,' Refrigeration, Vol. 60, No. 687, pp. 72-79
  11. I.S.Kyung, Herold. K., 2002, 'Performance of Horizontal Smooth Tube Absorber With and Without 2-Ethyl-Hexanol,' Journal of Heat Transfer, Vol. 124, pp. 177-183 https://doi.org/10.1115/1.1418366AdditionalInformation
  12. S.M.Deng, W.B.Ma, 1999, 'Experimental Studies on the Characteristics of an Absorber Using $LiBr/H_2O$ Solution As Working Fluid,' International Journal of Refrigeration, Vol. 22, pp. 293-301 https://doi.org/10.1016/S0140-7007(98)00067-X