THERMAL SCIENCE

International Scientific Journal

DESIGN AND CONSTRUCTION OF A LOW CAPACITY PUMP-LESS ABSORPTION SYSTEM

ABSTRACT
In this investigation, a low capacity absorption system has been designed and constructed where the mechanical pump has been replaced with a bubble pump, reducing the cost and eliminating the electrical power. Initially, a test rig bubble pump has been built with a single Pyrex tube to test the effect of different parameters on pumping flow rate. An absorption refrigeration system with a capacity of 2.5 kW has been designed and constructed. Results have shown that a bubble pump with five horizontal tubes with 2.5 mm diameter and submergence ratio of 0.4 has the best performance for this low capacity absorption refrigeration system. The COP of this structure was about 0.51 and mathematical modeling shows that increasing the solution concentration at generator outlet decreases the COP of the system.
KEYWORDS
PAPER SUBMITTED: 2012-01-19
PAPER REVISED: 2012-01-19
PAPER ACCEPTED: 2012-01-08
DOI REFERENCE: https://doi.org/10.2298/TSCI120119016M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2014, VOLUME 18, ISSUE Issue 2, PAGES [577 - 590]
REFERENCES
  1. von Platen. B.C, Munters. C.G, Refrigerator, US Patent 1, (1928), pp. 685-764
  2. Chen. J., Kin. K.J., Herold. K.E., Performance enhancement of a diffusion-absorption refrigerator,
  3. nternational Journal of Refrigeration 19 (1996), 3, pp. 208-218.
  4. Pfaff M., Saravanan. R., Maiya. M.P., Srinivasa. M., Studies on bubble pump for a water-lithium
  5. romide vapor absorption refrigeration, International Journal of Refrigeration 21 (1998) 6, pp.452-462
  6. Delano. A.D., Analysis of the Einstein Refrigeration Cycle, M.Sc Thesis, Georgia Institute of
  7. echnology, 1997
  8. Delano. A.D., Design Analysis of the Einstein Refrigeration Cycle, PhD Dissertation, Georgia
  9. nstitute of Technology, 1998
  10. White. S.J., Bubble pump design and performance, M.Sc. Thesis, Georgia Institute of technology,
  11. tlanta, Georgia, 2001.
  12. Koyfman. A., Jelinek. M., Levy. A., Borde. I., A study on bubble pump performance for diffusion
  13. bsorption refrigeration system with organic working fluids, in: Proceedings of the Second
  14. nternational Heat Powered Cycles Conference, Paris, 2001.
  15. Koyfman. A., Jelinek. M., Levy. A., and Borde. I., An experimental investigation of bubble pump
  16. erformance for diffusion absorption refrigeration, system with organic working fluids ,Applied
  17. hermal Engineering, Volume 23, 2003.
  18. Collier, J.G., and Thome, J.R. Convective Boiling and Condensation. McGraw-
  19. ill Book Co., New York, USA, 1996
  20. Rohi. S., Naghash Zadegan. M., Monsef. H., Experimental Analysis of Bubble Pump LiBr
  21. olution working Fluids for absorption refrigeration system, Proc.Eurosim, Ljubljana , Slovenia, 2007
  22. Ozisik M. Heat transfer--a basic approach. McGraw-Hill Co., New York, USA, 1985
  23. Howell RH, Sauer JH, Coad JW. Principles of HVAC. ASHRAE, Refrigeration Equipment,
  24. ection 18.21, 1998
  25. Kreith F, Bohn MS. Principles of heat transfer. 5th ed. PWS Publishing Company, 1997
  26. Nusselt in Ozisik M. Heat transfer--a basic approach. McGraw-Hill Book o., New York, USA,
  27. 985
  28. Florides, G.A., Kalogirou. S.A., Tassou. S.A., Wrobel. L.C. "Design and construction of a LiBr-
  29. ater absorption machine" Energy Conversion and Management 44 (2003) pp. 2483-2508
  30. Jakob,M , G,Hawkings , Elements of Heat Transfers 3rd ed. John wiley & sons, New York, USA
  31. Kirby. M.J., A computational model of falling film absorption in horizontal tube LiBr absorbers.
  32. .Sc. Thesis, Mechanical Engineering, The Pennsylvania State University, 1995.
  33. Icksoo Kyung , Keith E. Herold , Yong Tae Kang, "Model for absorption of water vapor into
  34. queous LiBr flowing over a horizontal smooth tube", International Journal of Refrigeration 30 (2007)
  35. p. 591-600
  36. Lee RJ, DiGuilio RM, Jeter SM, Teja AS. Properties of lithium bromide-water solutions
  37. t high temperatures and concentration. II. Density and viscosity. ASHRAE Trans (1990), 96,
  38. p.709-28
  39. Engineering Analysis of Experimental Data - ASHRAE Guideline 2-1986., Available
  40. rom American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1791
  41. ullie Circle, N.E., Atlanta, GA 30329.

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