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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Optimization Design of Liquid Desiccant Cooling System

액체 제습식 냉방 시스템의 최적 설계

  • Received : 2009.11.12
  • Published : 2010.07.10
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Abstract

This paper presents the optimization process of liquid desiccant cooling system using LiCl aqueous solution as a working fluid. Operating conditions(mass flow rate, conditioner outlet concentration, difference concentration) and design factors for heat exchangers(difference temperature of the district heating water, leaving temperature difference of the conditioner, leaving temperature difference of the regenerator, air temperature difference of the conditioner, air temperature difference of the regenerator) were optimized by response surface method. As a result, we obtained the 7.297 kW of cooling capacity and 0.788 of COP at optimized condition. Effect of difference temperature of hot water on system performances was also examined. As difference temperature of the district heating water increases, the cooling capacity increases and COP decreases.

Keywords

References

  1. Ertas, A., Anderson, E. E., and Kiris, I., 1992, Properties of new liquid desiccant solution-lithium chloride and calcium chloride mixture, Solar Energy, Vol. 49, No. 3 pp. 205-212. https://doi.org/10.1016/0038-092X(92)90073-J
  2. Lowenstein, A., 2006, A zero carryover liquid desiccant air conditioner for solar applications, ASME/SOLAR06, pp. 1-11.
  3. Jeong, J. S., Inagaki, K., Hongo, K., Saito, K., Ogisu, Y., and Kawai, S., 2005, Performance analysis of open cycle absorption type dehumidifier using LiCl-solution, Proc. of the SAREK, pp. 1056-1061.
  4. Kim, J. K., Kim, S. S., and Kang, Y. T., 2004, Simultaneous heat and mass transfer analysis for the plate type LiCl/H2O dehumidification system, Proc. of the SAREK, pp. 140-145.
  5. Conde, M. R., 2004, Properties of aqueous solution of lithium chloride and calcium chlorides : formulations for use in air conditioning equipment design, Int. J. of Thermal Sciences, Vol. 43, pp. 367-382. https://doi.org/10.1016/j.ijthermalsci.2003.09.003