#6434. Analysis of a multi-stage air gap diffusion distillation system powered by low-grade sensible heat

December 2026publication date
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Journal’s subject area:
Industrial and Manufacturing Engineering;
Energy Engineering and Power Technology;
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Abstract:
A novel multistage air-gap diffusion distillation (MS-AGDD) system powered by low-grade sensible heat (LGSH) was proposed for fully recovering heat from LGSH to produce freshwater. The effect of operating parameter variations on the system performances was investigated theoretically based on the ?-NTU model for AGDD. The operating parameters include the hot water inlet temperature (Thsin), the feed seawater flowrate (Vc,nin), salinity (Sc,nin) and temperature (Tc,nin), the temperature differences at the hot end of heat exchanger (?th) and at the cold end of coolers (?tc).
Keywords:
Air gap diffusion distillation; Desalination; Low-grade sensible heat; Multi-stage

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