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A parametric analysis of periodic and coupled heat and mass diffusion in desiccant wheels

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  • Nóbrega, Carlos E.L.

Abstract

Solid sorbents are frequently adopted for gas component separation in the chemical industry. Over the last decades, solid sorbents have also been applied for the benefit of indoor air quality and humidity control in modern building design. Adsorptive rotors have been designed for the removal of water vapor, CO and VOCs from indoor environments. Although the adsorption of water vapor by a specific adsorbent (particularly silica-gel) has been extensively studied, a non-dimensional parametric analysis of humidity adsorption on a nonspecific hygroscopic material appears to be an original contribution to the literature. Accordingly, a mathematical model using non-dimensional parameters is built from energy and mass balances applied to elementary control volumes. The periodic nature of the cyclic adsorption/desorption processes requires an iterative solution, which is carried out by comparing temperature and mass distributions at the onset to the distributions by the end of the cycle.

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  • Nóbrega, Carlos E.L., 2014. "A parametric analysis of periodic and coupled heat and mass diffusion in desiccant wheels," Energy, Elsevier, vol. 76(C), pages 942-948.
    • Handle: RePEc:eee:energy:v:76:y:2014:i:c:p:942-948
    DOI: 10.1016/j.energy.2014.09.008
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    References listed on IDEAS

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    1. La, D. & Li, Y. & Dai, Y.J. & Ge, T.S. & Wang, R.Z., 2012. "Development of a novel rotary desiccant cooling cycle with isothermal dehumidification and regenerative evaporative cooling using thermodynamic analysis method," Energy, Elsevier, vol. 44(1), pages 778-791.
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    4. De Antonellis, Stefano & Joppolo, Cesare Maria & Molinaroli, Luca & Pasini, Alberto, 2012. "Simulation and energy efficiency analysis of desiccant wheel systems for drying processes," Energy, Elsevier, vol. 37(1), pages 336-345.
    5. Zhang, Li-Zhi & Fu, Huang-Xi & Yang, Qi-Rong & Xu, Jian-Chang, 2014. "Performance comparisons of honeycomb-type adsorbent beds (wheels) for air dehumidification with various desiccant wall materials," Energy, Elsevier, vol. 65(C), pages 430-440.
    6. Nóbrega, C.E.L. & Brum, N.C.L., 2011. "A graphical procedure for desiccant cooling cycle design," Energy, Elsevier, vol. 36(3), pages 1564-1570.
    7. Nóbrega, C.E.L. & Brum, N.C.L., 2009. "Modeling and simulation of heat and enthalpy recovery wheels," Energy, Elsevier, vol. 34(12), pages 2063-2068.
    8. Sphaier, L.A. & Nóbrega, C.E.L., 2012. "Parametric analysis of components effectiveness on desiccant cooling system performance," Energy, Elsevier, vol. 38(1), pages 157-166.
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    1. Wu, X.N. & Ge, T.S. & Dai, Y.J. & Wang, R.Z., 2018. "Review on substrate of solid desiccant dehumidification system," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3236-3249.

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