収着剤デシカントにおける内部拡散作用の影響

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書誌事項

タイトル別名
  • Influence of Internal Diffusion in Sorbent Desiccant
  • 収着剤デシカントにおける内部拡散作用の影響 : 熱・物質伝達率の逆温度依存性の解明
  • シュウチャクザイ デシカント ニ オケル ナイブ カクサン サヨウ ノ エイキョウ : ネツ ・ ブッシツ デンタツリツ ノ ギャクオンド イソンセイ ノ カイメイ
  • -Elucidation of Inverse Dependency of Transfer Coefficients on Working Temperature-
  • ―熱・物質伝達率の逆温度依存性の解明―

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抄録

In sorbent desiccant for example in polymer desiccant, it has been well known that the moisture is captured by two effects of surface adsorption and internal diffusion (i.e. absorption). Since during the previous simulation works these effects were treated as a unity procedure, the mass and heat transfer coefficient were usually treated as a constant value depending on fully developed convective laminar flow. However it is sometimes reported that the heat and mass transfer coefficients are affected by working temperature and should have inverse dependency on the temperature. Therefore this paper informs new simulation method using a new interface transfer model that is considered as a parallel resistance model connecting the steady surface resistance and the variable diffusion resistance. By this model, dimensionless mass transfer Biot number is introduced to resolve the inverse dependency of transfer coefficients on the working temperature and it became clear that transfer coefficients of sorbent desiccant have strong inverse dependency on the temperature. Finally, using this fact, simulation results are informed to show behavior of high NTU by polymer desiccant.

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