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Sensors 2011, 11(9), 8674-8684; doi:10.3390/s110908674
Article

Real-Time Remote Monitoring of Temperature and Humidity Within a Proton Exchange Membrane Fuel Cell Using Flexible Sensors

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*
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan
* Author to whom correspondence should be addressed.
Received: 15 July 2011 / Revised: 19 August 2011 / Accepted: 5 September 2011 / Published: 8 September 2011
(This article belongs to the Section Physical Sensors)
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Abstract

This study developed portable, non-invasive flexible humidity and temperature microsensors and an in situ wireless sensing system for a proton exchange membrane fuel cell (PEMFC). The system integrated three parts: a flexible capacitive humidity microsensor, a flexible resistive temperature microsensor, and a radio frequency (RF) module for signal transmission. The results show that the capacitive humidity microsensor has a high sensitivity of 0.83 pF%RH−1 and the resistive temperature microsensor also exhibits a high sensitivity of 2.94 × 10−3 °C−1. The established RF module transmits the signals from the two microsensors. The transmission distance can reach 4 m and the response time is less than 0.25 s. The performance measurements demonstrate that the maximum power density of the fuel cell with and without these microsensors are 14.76 mW·cm−2 and 15.90 mW·cm−2, with only 7.17% power loss.
Keywords: flexible humidity microsensor; flexible temperature microsensor; radio frequency module; power density flexible humidity microsensor; flexible temperature microsensor; radio frequency module; power density
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Kuo, L.-S.; Huang, H.-H.; Yang, C.-H.; Chen, P.-H. Real-Time Remote Monitoring of Temperature and Humidity Within a Proton Exchange Membrane Fuel Cell Using Flexible Sensors. Sensors 2011, 11, 8674-8684.

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