کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
648679 | 884631 | 2008 | 9 صفحه PDF | دانلود رایگان |
Methanol concentration sensors are a key component in the development of direct methanol fuel cells. This paper describes a novel micro-fuel cell based methanol sensor, in which a methanol solution’s energy content is converted into thermal and electrical energy. A zero-dimensional mathematical model is provided to predict the thermal behavior of the sensor. This model reveals a linear correlation between the sensor’s maximum temperature rise and its heat production rate. The sensor’s thermal behavior was investigated experimentally under three different operation modes: (1) constant resistance, (2) constant current, and (3) constant voltage. The experimental results showed that the sensor’s maximum temperature rise had a linear relationship with methanol concentrations up to 10 mol/L. These results also confirmed the assumption of the mathematical model, namely that the heat production rate of the sensor is a linear function of methanol concentration. Therefore, the maximum temperature rise can be used as an indicator of methanol concentration.
Journal: Applied Thermal Engineering - Volume 28, Issue 13, September 2008, Pages 1605–1613