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A graphical procedure for desiccant cooling cycle design

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  • Nóbrega, C.E.L.
  • Brum, N.C.L.

Abstract

The interest in solid desiccant cooling cycles has been continuously increasing, supported by both the ecological soundness and the cost reduction associated with the low grade thermal energy it requires. As a result, many feasibility studies are conducted considering solar energy or waste heat as thermal sources for the desiccant cooling cycles. Such studies often consider pre-set values for the effectiveness of individual components, such as evaporative coolers, heat and desiccant wheels. Although a great number of works have been devoted to desiccant cooling cycle simulation, the diversity of assumptions underlying each mathematical model often makes it difficult to establish an unbiased comparison between independently obtained results. Moreover, many analyses are conducted disregarding important characteristics of the conditioned space, such as the ratio of the sensible and latent loads, or the minimum ventilation flow rate as required by the given number of occupants per hour. Accordingly, the present work proposes a design methodology for desiccant cooling cycles, which can be easily carried out graphically on a psychrometric chart. The procedure is then exemplified to analyze the influence of design parameters, such as the steepness of the condition line, over the applicability of desiccant systems.

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  • 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.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:3:p:1564-1570
    DOI: 10.1016/j.energy.2011.01.002
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    References listed on IDEAS

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    Cited by:

    1. Jani, D.B. & Mishra, Manish & Sahoo, P.K., 2016. "Solid desiccant air conditioning – A state of the art review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 1451-1469.
    2. Angrisani, Giovanni & Roselli, Carlo & Sasso, Maurizio, 2015. "Experimental assessment of the energy performance of a hybrid desiccant cooling system and comparison with other air-conditioning technologies," Applied Energy, Elsevier, vol. 138(C), pages 533-545.
    3. Ruivo, Celestino R. & Goldsworthy, Mark & Intini, Manuel, 2014. "Interpolation methods to predict the influence of inlet airflow states on desiccant wheel performance at low regeneration temperature," Energy, Elsevier, vol. 68(C), pages 765-772.
    4. Zheng, X. & Ge, T.S. & Wang, R.Z., 2014. "Recent progress on desiccant materials for solid desiccant cooling systems," Energy, Elsevier, vol. 74(C), pages 280-294.
    5. Zouaoui, Ahlem & Zili-Ghedira, Leila & Ben Nasrallah, Sassi, 2016. "Open solid desiccant cooling air systems: A review and comparative study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 889-917.
    6. Chen, W.D. & Vivekh, P. & Liu, M.Z. & Kumja, M. & Chua, K.J., 2021. "Energy improvement and performance prediction of desiccant coated dehumidifiers based on dimensional and scaling analysis," Applied Energy, Elsevier, vol. 303(C).
    7. Ruivo, Celestino R. & Angrisani, Giovanni & Minichiello, Francesco, 2015. "Influence of the rotation speed on the effectiveness parameters of a desiccant wheel: An assessment using experimental data and manufacturer software," Renewable Energy, Elsevier, vol. 76(C), pages 484-493.
    8. 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.
    9. Wang, H.H. & Ge, T.S. & Zhang, X.L. & Zhao, Y., 2016. "Experimental investigation on solar powered self-cooled cooling system based on solid desiccant coated heat exchanger," Energy, Elsevier, vol. 96(C), pages 176-186.
    10. 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.
    11. 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.
    12. Ghiaus, Christian, 2014. "Linear algebra solution to psychometric analysis of air-conditioning systems," Energy, Elsevier, vol. 74(C), pages 555-566.

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