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Technical Briefs

Comparative Study of Membrane Humidifier and Enthalpy Wheel Humidifier for Large Power Fuel Cell System

[+] Author and Article Information
Lao Xingsheng, Ma Shihu, Zhao Juntao, Zeng Hong

 Wuhan Second Ship Design and Research Institute, Wuhan, 430064, China

Zhuge Weilin, Zhang Yangjun

Department of Automotive Engineering, Tsinghua University, Beijing, 100084, China

J. Fuel Cell Sci. Technol 6(1), 014501 (Nov 25, 2008) (3 pages) doi:10.1115/1.2971175 History: Received June 01, 2007; Revised September 29, 2007; Published November 25, 2008

The performance of membrane humidifier (MH) and enthalpy wheel humidifier (EWH) for a large power proton exchange membrane fuel cell (PEMFC) system is compared using simulations and experiments. The MH model is based on one dimensional diffusion equation and the EWH model is based on the porous media surface diffusion equation. Simulation results agree well with experimental data. According to the results, the effect of intake air temperature has a lower effect on the MH performance than it does on the EWH performance while the air mass flow has a much higher effect on the MH performance than it does on the EWH performance. MH performs better than EWH at a low flow rate but worse at a high flow rate. Vapor transfer mechanism in the humidifiers is also studied.

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Figures

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Figure 1

Effect of intake air temperature on the humidifiers’ performance

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Figure 2

Effect of air mass flow rate on the humidifiers’ performance

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Figure 3

(a) Effect of the operating parameters on Δλ (b) Effect of the perating parameters on D

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Figure 4

Effect of wheel speed on K

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Figure 5

Effect of intake air temperature on K

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