A New Approach for the Heat and Moisture Transfer in Desiccant Wheels Concerning Air Stream Velocity

Document Type : Full Lenght Research Article

Authors

1 Energy Department, Materials and Energy Research Center (MERC), Karaj, Iran

2 Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran

Abstract

Many investigators have presented mathematical work on desiccant wheels but there is a considerable discrepancy between published values and experimental values. A mathematical model based  on the two-dimensional  Navier-Stokes   equation has been derived to show the dehumidification trend of desiccant dehumidifier concerning air stream velocity. In this model the effect of air stream velocity on wheel performance as a momentum equation combined with heat and mass transfer has been studied. The current model is capable of predicting the transient and steady-state transport in a desiccant wheel. It reveals the moisture and temperature in both the airflow channels and the sorbent felt, in detail, as a function of time. The predicted results are validated against the data taken from experimental results, with reasonable accuracy. Therefore, the numerical model is a practical tool for understanding and accounting for the complicated coupled operational process inside the wheel. Consequently, it is useful for parameter studies.

Keywords

Main Subjects

References

  1. Staton, JC., Scott, EP., Kander, RG., Thomas, JR., 1998. Heat and mass transfer characteristics of desiccant polymers. M.S. Thesis, Virginia Polytechnic Institute and State University, Virginia, USA.
  2. Konogula, M., Carpinlioglu, ÖzM., Yildirim, M., 2004. Energy and exergy analysis of an experimental open cycle desiccant cooling system. Applied Thermal Engineering, 24, pp. 919-932.
  3. Beccali, M., Adhikari, RS., Butera, F., Franzitta, V., 2004. Update on desiccant wheel model. International Journal of Energy Research, 28, pp. 1043-1049.
  4. Beccali, M., Butera, F., Guanella, R., Adhikari, RS., 2003. Simplified models for the performance evaluation of desiccant wheel dehumidification. International Journal of Energy Research, 27, pp. 17-29.
  5. Maclaine-Cross, IL., 1988. Proposal for a desiccant air conditioning system. ASHRAE Transaction, 94, pp.1997-2009.
  6. Barlow, RS., 1982. Analysis of Adsorption Process and of Desiccant Cooling System; a Pseudo-Steady-State Model for Coupled Heat and Mass Transfer. Solar Energy Research Institute TR, pp. 631–1330.
  7. Collier, RK., Cohen, BM., 1991. An analytic investigation of methods for improving the performance of desiccant cooling system. ASME Journal of Solar Energy Science and Engineering, 113, pp. 157–163.
  8. Zheng W, Worek WM,1993. Numerical simulation of combined heat and mass transfer processes in a rotary dehumidifier. Numerical Heat Transfer, 23, pp. 211-232.
  9. Zheng, W., Worek, WM., Novosel, V., 1995. Performance optimization of rotary dehumidifiers. ASME Journal of Solar Energy Science and Engineering, 117, pp. 40-44.
  10. Zhang, HF., Yu, JD., Liu, ZS.,1996. The research and development of the key components for desiccant cooling system. World Renewable Energy Congress, pp. 653-656.
  11. Zhang, LZ., Niu, JL., 2002. Performance comparisons of desiccant wheels for air dehumidification and enthalpy recovery. Applied Thermal Engineering, 22, pp. 1347-1367.
  12. Dai, YJ., Wang, RZ., Zhang, HF., 2001. Parameter analysis to improve rotary desiccant dehumidification using a mathematical model. International Journal of Thermal Science, 40, pp. 400-408.
  13. Dai, YJ., Wang, RZ., Xu, YX., 2002. Study of solar powered solid adsorption desiccant cooling system used for grain storage. Renewable Energy, 25, pp. 417-430.
  14. Pahlavanzadeh, H., Mozaffari, H., 2003. Performance optimization of rotary desiccant dehumidifiers. Iranian Journal of science and Technology, 27, pp.337-344.
  15. Pahlavanzadeh, H., Zamzamian, A.H., 2006. A mathematical model for a fixed desiccant bed dehumidifier concerning Ackermann correction factor. Iranian Journal of science and Technology, 30, pp. 1-9.
  16. Lee, Y., Park, S., Kang, S., 2021 Performance analysis of a solid desiccant cooling system for a residential air conditioning system. Appl. Therm. Eng., 182, pp. 1-8.
  17. Yeboah, S.K., Darkwa, J., 2021. Experimental investigation into the integration of solid desiccant packed beds with oscillating heat pipes for energy efficient isothermal adsorption processes. Thermal Sci. Eng. Progress, 21, pp. 100791.
  18. Yu, L., Shamim, J.A., Hsu, W., Daiguji, H., 2021. Optimization of parameters for air dehumidification systems including multilayer fixed-bed binder-free desiccant dehumidifier. Int. J. Heat Mass Transfer, 172, pp. 121.
  19. De Antonellis, S., Colombo, L., Freni, A., Joppolo, C., 2021. Feasibility study of a desiccant packed bed system for air humidification. Energy, 214, pp. 119002.
  20. Bhabhor, K.K., Jani, D.B., 2021. Performance analysis of desiccant dehumidifier with different channel geometry using CFD. J. Build. Eng., 44, pp. 103021.
  21. Awad, M.M., Hamed, A.H., Bekheit, M.M., 2008. Theoretical and experimental investigation on the radial flow desiccant dehumidification bed. Appl. Therm. Eng. 28, pp. 75–85.
  22. Kabeel, A.E., 2009. Adsorption–desorption operations of multilayer desiccant packed bed for dehumidification applications. Renewable Energy, 34, pp. 255–265.
  23. Abd-Elrahman, W.R., Hamed, A.H., El-Emam, S.H., Awad, M.M., 2011. Experimental investigation on the performance of radial flow desiccant bed using activated alumina. Appl. Therm. Eng., 31, pp.2709–2715.
  24. Hamed, A.H., Abd-Elrahman, W.R., El-Emam, S.H., Awad, M.M., 2013. Theoretical and experimental investigation on the transient coupled heat and mass transfer in a radial flow desiccant packed bed. Energy Convers. Manage., 65, pp. 262–271.
  25. Ramzy, A.K., Kadoli, R., TP, A.B., 2013. Experimental and theoretical investigations on the cyclic operation of TSA cycle for air dehumidification using packed beds of silica  gel particles. Energy, 56,pp. 8–24.
  26. Ramzy, A.K., AbdelMeguid, H., Elawady, W.M., 2015. A novel approach for enhancing the utilization of solid desiccants in packed bed via intercooling. Appl. Therm. Eng.,78,pp. 82–89.
  27. Finocchiaro, P., Beccali, M., Gentile, V., 2016. Experimental results on adsorption beds for air dehumidification. Int. J. Refrig., 63, pp. 100–112.
  28. Pistocchini, L., Garone, S., Motta, M., 2016. Air dehumidification by cooled adsorption in silica gel grains. Part I: Experimental development of a prototype. Appl. Therm. Eng., 107,pp. 888–897.
  29. Pistocchini, L., Garone, S., Motta, M., 2017. Air dehumidification by cooled adsorption in silica gel grains. part ii: theoretical analysis of the prototype testing results. Appl. Eng., 110, pp.1682–1689.
  30. Shamim, J.A., Hsu, W.L., Kitaoka, K., Paul, S., Daiguji, H., 2018. Design and performance evaluation of a multilayer fixed-bed binder-free desiccant dehumidifier for hybrid air-conditioning systems: part i–experimental. Int. J. Heat Mass Transfer, 116,pp. 1361–1369.
  31. Hsu, W.L., Paul, S., Shamim, J.A., Kitaoka, K., Daiguji, H., 2018. Design and performance evaluation of a multilayer fixed-bed binder-free desiccant dehumidifier for hybrid air-conditioning systems: part II–theoretical analysis. Int. J. Heat Mass Transfer, 116, pp. 1370–1378.
  32. Yeboah, S.K., Darkwa, J., 2019. Experimental investigations into the adsorption enhancement in packed beds using Z-Annular flow configuration. Int. J. Therm. Sci., 136, pp.121–134.
  33. Abd-Elhady, M.M., Salem, M.S., Hamed, A.M.,EL-Sharkawy, I.I., 2022. Solid desiccant-based dehumidification systems: A critical review on configurations, techniques, and current trends. Int. J. of Refrigeration, 133, pp.337–352.
  34. Pahlavanzadeh, H., Zamzamian, S.A.H., Omidkhah Nasrin M.R., 2007. ANALYSIS OF EFFECTIVE PARAMETERS ON A ROTARY DESICCANT WHEEL PERFORMANCE. MECHANICAL ENGINEERING SHARIF, 23(40), pp. 155-162.
  35. Zamzamian, S.A.H., Pahlavanzadeh, H., 2011. Theoretical and Experimental Investigation of the Key Components for a Rotary Desiccant Wheel. Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 30(3),pp. 25-30.
  36. Ghaffarpasand, 2018. Characterization of unsteady double-diffusive mixed convection flow with soret and dufour effects in a square enclosure with top moving lid. Journal of Heat and Mass Transfer Research, 5,pp. 51-68.
  37. Winkelman JGM, Sijbring H, Beenackers AACM, De Vries E.T., 1992. Modeling and simulation of industrial formaldehyde absorbers. Chemical Engineering Science, 47, pp.3785-3792.

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History

  • Receive Date: 04 October 2022
  • Revise Date: 28 January 2023
  • Accept Date: 11 February 2023

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