Studies on solid state electrolytic dehumidifier – Modeling of its water transfer characteristics and electrode reactions
Year: 2011
Type: dissertation
Abstract: A model for a dehumidifying device using a solid polymer electrolyte membrane (Nafion 117, Dupont) is proposed. The dehumidifier in the model is represented by a physical model composed of a two-layer membrane and electrodes on the membrane surfaces. Measurement of the membrane weight shows that the ratio of the water content of the membrane to humidity in the surrounding air is a function of temperature under equilibrium conditions. The results for the water ratio are used for determining the parameters required for the modeling. The electrical resistance of the dehumidifier was measured and is given as a function of temperature and the membrane water content. Simulation of the characteristics of the dehumidifying device is presented, using the model, and the results are found to agree with the measured characteristics of the device. An attempt to determine the parameters describing the dehumidifying processes are also reported. List of symbols D : Diffusion coefficient of water in the dehumidifying element / cm2 s-1 e : Electron charge=1.602 × 1019 / C I : Current of the dehumidifying element/ A Ist : Current at steady state condition/ A j : Current density of the dehumidifying element /a cm-2 g κ : Coefficients relevant to the diffusion velocity of water from the air to the
Authors: Shuichi Sakuma, 秀一 佐久間
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W567198411