THERMAL SCIENCE

International Scientific Journal

NUMERICAL AND EXPERIMENTAL ANALYSIS OF A SOLID DESICCANT WHEEL

ABSTRACT
The rotary desiccant dehumidifier is an important component which can be used in air conditioning systems in order to reduce the electrical energy consumption and introduce renewable energy sources. In this study a one dimensional gas side resistance model is presented for predicting the performance of the desiccant wheel. Measurements from two real sorption wheels are used in order to validate the model. One wheel uses silica gel as desiccant material and the other lithium chloride. The simulation results are in good agreement with the experimental data. The model is used to compare the counter flow with the co-current wheel arrangements and to explain why the counter flow one is more efficient for air dehumidification.
KEYWORDS
PAPER SUBMITTED: 2014-04-04
PAPER REVISED: 2015-01-20
PAPER ACCEPTED: 2015-03-06
PUBLISHED ONLINE: 2015-04-04
DOI REFERENCE: https://doi.org/10.2298/TSCI141118041K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Issue 2, PAGES [613 - 621]
REFERENCES
  1. Antonellis, D.S., et. al., Simulation, performance analysis and optimization of desiccant wheels, Energy and Buildings, 42 (2010), 9, pp.1386-1393
  2. Cappozzoli, A., et. al., Hybrid HVAC systems with chemical dehumidification for supermarket applications, Applied Thermal Engineering, 26 (2006), 8-9, pp. 795-805
  3. Angrisani, G., et. al., Assessment of Energy, Environmental and Economic Performance of a Solar Desiccant Cooling System with Different Collector Types, Energies, 7 (2014), 10, pp. 6741-6764
  4. Sphaier, L.A., Worek, W. M., Analysis of heat and mass transfer in porous sorbents used in rotary regenerators, International Journal of Heat and Mass Transfer, 47 (2004), 14-16, pp. 3415-3430
  5. Zhang, X.J., et. al., A simulation study of heat and mass transfer in a honeycombed rotary desiccant dehumidifier, Applied Thermal Engineering, 23 (2003), 8, pp. 989-1003
  6. Chung, J. D., et. al., Optimization of desiccant wheel speed and area ratio of regeneration to dehumidification as a function of regeneration temperature, Solar Energy, 83 (2009), 5, pp. 625-635
  7. Zheng, W., Worek, W. M., Numerical simulation of combined heat and mass transfer processes in a rotary dehumidifier, Numerical Heat Transfer, Part A: Applications: An International Journal of Computation and Methodology, 23 (1993), 2, pp. 211-232
  8. Ge, T.S., et. al., A mathematical model for predicting the performance of a compound desiccant wheel (A model of compound desiccant wheel), Applied Thermal Engineering, 30 (2010), 8-9, pp. 1005-1015
  9. Zhang, L.Z., Niu, J. L., Performance comparisons of desiccant wheels for air dehumidification and enthalpy recovery, Applied Thermal Engineering, 22 (2002), 12, pp. 1347-1367
  10. Ruivo, C. R., et. al., Validity of pseudo-gas-side-controlled models to predict the behavior of desiccant matrices, International Journal of Thermal Sciences, 48 (2009), 11, pp. 2171-2178
  11. Ge, T.S., et. al., A review of the mathematical models for predicting rotary desiccant wheel, Renewable and Sustainable Energy Reviews, 12 (2008), 6, pp. 1485-1528
  12. Angrisani, G., et. al., Effect of rotational speed on the performances of a desiccant wheel, Applied Energy, 104 (2013), pp. 268-275
  13. Enteria, N., et. al., Experimental heat and mass transfer of the separated and coupled rotating desiccant wheel and heat wheel, Experimental Thermal and Fluid Science, 34 (2010), 5, pp. 603-615
  14. Jia, C.X., et. al., Experimental comparison of two honeycombed desiccant wheels fabricated with silica gel and composite desiccant material, Energy Conversion and Management, 47 (2006), 15-16, pp. 2523-2534.
  15. Rabah, A. A., Experimental investigation on the performance of a lithium chloride wheel, Thermal Science, 16 (2012), 4, pp. 1137-1150
  16. Koronaki, I. P., et. al., Experimental assessment and thermodynamic analysis of a solar desiccant cooling system, International Journal of Sustainable Energy, 32 (2013), 2, pp. 121-136
  17. Koronaki, I. P., et. al., Thermodynamic analysis of an open cycle solid desiccant cooling system using Artificial Neural Network, Energy Conversion and Management, 60 (2012), pp. 152-160
  18. Qin, C. K., Schmitz, G., Performance prediction of LiCl rotor, International Journal on Architectural Science, 3 (2002), 1, pp. 20-29

© 2021 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence