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This study uses computational fluid dynamics (CFD) to evaluate the performance enhancement of a falling film liquid desiccant cooling system (LDCs) using lithium chloride (LiCl) with 0.4 wt % polyvinyl pyrrolidone (PVP) as a surfactant. Validated against experimental data, the CFD model shows that PVP reduces the contact angle from 58.6° to 29.7°, improving wettability and increasing dehumidification rate by 21.6% and effectiveness by 17%. Parametric studies indicate that higher solution concentration (30–40 wt.%) and air humidity (16–25 g/kg) enhance performance, while higher solution temperature (301–309 K) reduces it. As a non-toxic, odorless surfactant, PVP offers a sustainable solution for LDCs, suitable for renewable energy integration.

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Enhancing Falling Film Dehumidification with PVP Additive: A CFD Study

  • 会议论文

  • 发表日期：

    2026年

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  • Shrikant Kol,
  • Manoj Arya

摘要

This study uses computational fluid dynamics (CFD) to evaluate the performance enhancement of a falling film liquid desiccant cooling system (LDCs) using lithium chloride (LiCl) with 0.4 wt % polyvinyl pyrrolidone (PVP) as a surfactant. Validated against experimental data, the CFD model shows that PVP reduces the contact angle from 58.6° to 29.7°, improving wettability and increasing dehumidification rate by 21.6% and effectiveness by 17%. Parametric studies indicate that higher solution concentration (30–40 wt.%) and air humidity (16–25 g/kg) enhance performance, while higher solution temperature (301–309 K) reduces it. As a non-toxic, odorless surfactant, PVP offers a sustainable solution for LDCs, suitable for renewable energy integration.