Entropy parameters for desiccant wheel design

Niccolò Giannetti*, Andrea Rocchetti, Kiyoshi Saito, Seiichi Yamaguchi


研究成果: Article査読

14 被引用数 (Scopus)


In this work a thermodynamic analysis of a desiccant wheel is proposed to investigate and identify the optimum size and operating regime of this device. A steady state entropy generation expression, based on effectiveness parameters suitable for desiccant wheels operability, is obtained applying a control volume approach and assuming perfect gas behaviour of the binary air-vapour mixture. A new entropy generation number NL is defined using a minimum indicative value of the entropy generation SL,min and investigated in order to obtain useful criteria for desiccant wheels optimization. The effectiveness-NTU design method is employed by combining solution of thermal exchange efficiency for rotary heat exchanger with the characteristic potential method, under the conditions of heat and mass transfer analogy. The analysis is applied to a specific desiccant wheel and NL variation with NTU is explored under various operative conditions and wheels characteristics in terms of dimensionless velocity and flow unbalance ratio.

ジャーナルApplied Thermal Engineering
出版ステータスPublished - 2015 1月 22

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 産業および生産工学


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