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Modeling and simulation of heat and enthalpy recovery wheels

Author

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  • Nóbrega, C.E.L.
  • Brum, N.C.L.

Abstract

The application of heat and enthalpy wheels in HVAC systems has been steadily increasing, powered by the cost reduction associated with the decrease of the thermal load they provide. Heat wheels are usually employed to pre-cool the fresh air stream before it is admitted to the fan coil. When impregnated with a hygroscopic material, heat wheels are often referred to as enthalpy wheels, and are also capable of drying the make-up air supply, thus providing a further thermal load reduction. Accordingly, the present work aims at developing a simple mathematical model to describe the heat and mass transfers in rotary exchangers, which is validated by comparing the present with independently obtained results. An Effectiveness-number of thermal units (NTU) analysis is carried out, the results showing that heat wheels can be far less efficient than enthalpy recovery wheels, depending on the atmospheric conditions.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:34:y:2009:i:12:p:2063-2068
    DOI: 10.1016/j.energy.2008.08.016
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    Citations

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    Cited by:

    1. Stefano De Antonellis & Manuel Intini & Cesare Maria Joppolo & Calogero Leone, 2014. "Design Optimization of Heat Wheels for Energy Recovery in HVAC Systems," Energies, MDPI, vol. 7(11), pages 1-20, November.
    2. Zeng, Cheng & Liu, Shuli & Shukla, Ashish, 2017. "A review on the air-to-air heat and mass exchanger technologies for building applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 75(C), pages 753-774.
    3. Eloy Melian & Harald Klein & Nikolaus Thißen, 2020. "Improvement of a Nusselt-Based Simulation Model for Heat Transfer in Rotary Heat Exchangers," Energies, MDPI, vol. 14(1), pages 1-26, December.
    4. 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.
    5. Hamed, Ahmed M. & Abd El Rahman, Walaa R. & El-Emam, S.H., 2010. "Experimental study of the transient adsorption/desorption characteristics of silica gel particles in fluidized bed," Energy, Elsevier, vol. 35(6), pages 2468-2483.
    6. Calautit, John Kaiser & O’Connor, Dominic & Tien, Paige Wenbin & Wei, Shuangyu & Pantua, Conrad Allan Jay & Hughes, Ben, 2020. "Development of a natural ventilation windcatcher with passive heat recovery wheel for mild-cold climates: CFD and experimental analysis," Renewable Energy, Elsevier, vol. 160(C), pages 465-482.
    7. O’Connor, Dominic & Calautit, John Kaiser S. & Hughes, Ben Richard, 2016. "A review of heat recovery technology for passive ventilation applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 1481-1493.
    8. 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.
    9. Mardiana, A. & Riffat, S.B., 2013. "Review on physical and performance parameters of heat recovery systems for building applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 174-190.
    10. 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.
    11. Cuce, Pinar Mert & Riffat, Saffa, 2015. "A comprehensive review of heat recovery systems for building applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 47(C), pages 665-682.
    12. Bai, H.Y. & Liu, P. & Justo Alonso, M. & Mathisen, H.M., 2022. "A review of heat recovery technologies and their frost control for residential building ventilation in cold climate regions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 162(C).
    13. Ge, T.S. & Dai, Y.J. & Wang, R.Z. & Peng, Z.Z., 2010. "Experimental comparison and analysis on silica gel and polymer coated fin-tube heat exchangers," Energy, Elsevier, vol. 35(7), pages 2893-2900.
    14. Qi Xu & Saffa Riffat & Shihao Zhang, 2019. "Review of Heat Recovery Technologies for Building Applications," Energies, MDPI, vol. 12(7), pages 1-22, April.
    15. O’Connor, Dominic & Calautit, John Kaiser & Hughes, Ben Richard, 2016. "A novel design of a desiccant rotary wheel for passive ventilation applications," Applied Energy, Elsevier, vol. 179(C), pages 99-109.
    16. Mardiana-Idayu, A. & Riffat, S.B., 2012. "Review on heat recovery technologies for building applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(2), pages 1241-1255.

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