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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

Cycle Simulation of a Desiccant Cooling System with a Regenerative Evaporative Cooler

재생형 증발식 냉각기를 이용한 제습 냉방시스템의 성능해석

  • 이재완 (국민대학교 대학원) ;
  • 이대영 (한국과학기술연구원 열유동제어센) ;
  • 강병하 (국민대학교 기계ㆍ자동차공학부)
  • Published : 2004.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

Comparison of the cooling performance is provided between the desiccant cool-ing systems incorporating a direct evaporative cooler and a regenerative evaporative cooler, respectively. Cycle simulation is conducted, and the cooling capacity and COP are evaluated at various temperature and humidity conditions. The COP of the system with a regenerative evaporative cooler and the regeneration temperature of 6$0^{\circ}C$ is evaluated 0.65 at the outdoor air condition of 35$^{\circ}C$ and 40% RH. This value is found about 3.4 times larger than that of the system with a direct evaporative cooler. Furthermore, incorporating a regenerative evaporative cooler eliminates the need for deep dehumidification in a desiccant dehumidifier that is necessary to achieve low air temperature in the system with a direct evaporative cooler. Subsequently, the regenerative evaporative cooler enables the use of low temperature heat source to regenerate the dehumidifier permitting the desiccant cooling system more beneficial compared with other thermal driven air conditioners.

Keywords

References

  1. Jain, S., Dhar, P. L. and Kaushik, S. C., 1995, Evaluation of solid desiccant based evapo rative cooling cycles for typical hot and humid climates, Revue Internationale du Froid, Vol. 18, No. 6, pp. 287-296
  2. Vineyard, E. A., Sand, J. R. and Durfee, D. J., 2000, Parametric analysis of variables that affect the performance of a desiccant dehumidification system, ASHRAE Transactions, Vol. 106, pp. 87-94
  3. Maclaine-Cross, I. L. and Banks, P. J., 1983, A general theory of wet surface heat exchangers and its application to regenerative evaporative cooler, Jouranl of Heat Transfer, Vol. 103, pp. 579-585
  4. Hsu, S. T., Lavan, Z. and Worek, W., 1989, Optimization of wet-surface heat exchangers, Energy, Vol. 14. pp. 757-770 https://doi.org/10.1016/0360-5442(89)90009-1
  5. Lee, D.-Y., Yoon, Y. I. and Lee, J. H., 2002, Optimal design and performance evaluation of a finned regenerative evaporative cooler, Proc. 12th Int. Heat Transfer Conference, pp. 261-266
  6. Commercial evaporative cooler, Premier website, http://www.piec.com/
  7. Kodama, A., Hirayama, T., Goto, M., Hirose, T. and Critoph, R. E., 2001, The use of psychrometric charts for the optimisation of a thermal swing desiccant wheel, Applied Thermal Engineering, pp. 1657-1674
  8. Beccali, M., Butera, F. and Adhikari, R. S., 2003, Simplifed models for the performance evaluation of desccant wheel dehumidification, Int. Journal of Energy Research, Vol. 27, pp. 17-29 https://doi.org/10.1002/er.856