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Desiccant wheel regenerated by thermal energy from a microcogenerator: Experimental assessment of the performances

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  • Angrisani, Giovanni
  • Capozzoli, Alfonso
  • Minichiello, Francesco
  • Roselli, Carlo
  • Sasso, Maurizio

Abstract

Hybrid desiccant HVAC systems have shown several advantages, compared to conventional cooling and dehumidification systems. Therefore, their use is also spreading for tertiary and residential buildings, especially when the regeneration of the desiccant can be obtained by using available waste heat. In this paper, an experimental analysis is presented on the performances of a silica-gel desiccant wheel, inserted in a test facility characterized by an advanced desiccant air handling unit, coupled to an electric chiller, a natural gas-fired boiler and a small scale cogenerator. The desiccant wheel is regenerated by using low temperature thermal energy recovered from the microcogenerator. The effects of the main thermal-hygrometric parameters (outdoor air humidity ratio and temperature, regeneration air temperature) on the desiccant wheel performances have been experimentally evaluated; in particular, the thermal-hygrometric properties of the process air exiting the rotor and the desiccant wheel effectiveness values have been obtained. Finally, fixing the regeneration temperature at its maximum available value (65 °C), ventilation and internal latent loads that the desiccant wheel can handle have been evaluated and compared to the required values, both for a set of cities all over the world and as a function of the thermal-hygrometric outdoor conditions.

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  • Angrisani, Giovanni & Capozzoli, Alfonso & Minichiello, Francesco & Roselli, Carlo & Sasso, Maurizio, 2011. "Desiccant wheel regenerated by thermal energy from a microcogenerator: Experimental assessment of the performances," Applied Energy, Elsevier, vol. 88(4), pages 1354-1365, April.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:4:p:1354-1365
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    5. Chen, Liu & Tan, Yikun, 2020. "The performance of a desiccant wheel air conditioning system with high-temperature chilled water from natural cold source," Renewable Energy, Elsevier, vol. 146(C), pages 2142-2157.
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    7. Rambhad, Kishor S. & Walke, Pramod V. & Tidke, D.J., 2016. "Solid desiccant dehumidification and regeneration methods—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 73-83.
    8. Angrisani, Giovanni & Minichiello, Francesco & Roselli, Carlo & Sasso, Maurizio, 2012. "Experimental analysis on the dehumidification and thermal performance of a desiccant wheel," Applied Energy, Elsevier, vol. 92(C), pages 563-572.
    9. Speerforck, Arne & Schmitz, Gerhard, 2016. "Experimental investigation of a ground-coupled desiccant assisted air conditioning system," Applied Energy, Elsevier, vol. 181(C), pages 575-585.
    10. 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.
    11. Chiang, Yuan-Ching & Chen, Chih-Hao & Chiang, Yi-Chin & Chen, Sih-Li, 2016. "Circulating inclined fluidized beds with application for desiccant dehumidification systems," Applied Energy, Elsevier, vol. 175(C), pages 199-211.
    12. Tu, Rang & Liu, Xiao-Hua & Jiang, Yi, 2015. "Irreversible processes and performance improvement of desiccant wheel dehumidification and cooling systems using exergy," Applied Energy, Elsevier, vol. 145(C), pages 331-344.
    13. Husham Abdulmalek, Shaymaa & Khalaji Assadi, Morteza & Al-Kayiem, Hussain H. & Gitan, Ali Ahmed, 2018. "A comparative analysis on the uniformity enhancement methods of solar thermal drying," Energy, Elsevier, vol. 148(C), pages 1103-1115.
    14. Shamim, Jubair A. & Hsu, Wei-Lun & Paul, Soumyadeep & Yu, Lili & Daiguji, Hirofumi, 2021. "A review of solid desiccant dehumidifiers: Current status and near-term development goals in the context of net zero energy buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 137(C).
    15. Yeboah, S.K. & Darkwa, J., 2016. "A critical review of thermal enhancement of packed beds for water vapour adsorption," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 1500-1520.
    16. La, D. & Dai, Y.J. & Li, Y. & Tang, Z.Y. & Ge, T.S. & Wang, R.Z., 2013. "An experimental investigation on the integration of two-stage dehumidification and regenerative evaporative cooling," Applied Energy, Elsevier, vol. 102(C), pages 1218-1228.
    17. Piacentino, Antonio & Barbaro, Chiara, 2013. "A comprehensive tool for efficient design and operation of polygeneration-based energy μgrids serving a cluster of buildings. Part II: Analysis of the applicative potential," Applied Energy, Elsevier, vol. 111(C), pages 1222-1238.
    18. Tu, Rang & Liu, Xiao-Hua & Jiang, Yi, 2013. "Performance analysis of a new kind of heat pump-driven outdoor air processor using solid desiccant," Renewable Energy, Elsevier, vol. 57(C), pages 101-110.
    19. Angrisani, Giovanni & Roselli, Carlo & Sasso, Maurizio, 2013. "Effect of rotational speed on the performances of a desiccant wheel," Applied Energy, Elsevier, vol. 104(C), pages 268-275.
    20. Saputra, Dendi Adi & Osaka, Yugo & Tsujiguchi, Takuya & Haruki, Masashi & Kumita, Mikio & Kodama, Akio, 2020. "Experimental investigation of desiccant wheel dehumidification control method for changes in regeneration heat input," Energy, Elsevier, vol. 205(C).
    21. Zhou, Xingchao & Goldsworthy, Mark & Sproul, Alistair, 2018. "Performance investigation of an internally cooled desiccant wheel," Applied Energy, Elsevier, vol. 224(C), pages 382-397.
    22. Sheng, Ying & Zhang, Yufeng & Zhang, Ge, 2015. "Simulation and energy saving analysis of high temperature heat pump coupling to desiccant wheel air conditioning system," Energy, Elsevier, vol. 83(C), pages 583-596.

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