Effect of a diffuser on performance enhancement of a cylindrical methanol steam reformer by computational fluid dynamic analysis
| Autor: | Horng Wen Wu, Shiang Wuu Perng, Rong Fang Horng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Methanol reformer Waste management 020209 energy Mechanical Engineering 05 social sciences Proton exchange membrane fuel cell 02 engineering and technology Building and Construction Management Monitoring Policy and Law Steam reforming chemistry.chemical_compound General Energy Volume (thermodynamics) chemistry Chemical engineering 0502 economics and business 0202 electrical engineering electronic engineering information engineering Small stationary reformer Methanol 050207 economics Diffuser (sewage) Hydrogen production |
| Zdroj: | Applied Energy. 206:312-328 |
| ISSN: | 0306-2619 |
| Popis: | Proton exchange membrane fuel cells (PEMFC) connected with a methanol steam reformer designed to enhance its performance is considered as a promising future power source. Enhancing the performance of a cylindrical methanol steam reformer due to diffuser effects was then investigated applying three-dimensional computational fluid dynamics by the SIMPLE-C algorithm and an Arrhenius form of reaction model. The effect of the angle and length of the diffuser, and wall temperature have been explored on heat and fluid flow, methanol conversion, hydrogen production, carbon monoxide reduction, as well as estimated net power of fuel cell with the same catalyst volume and entrance condition in a cylindrical methanol steam reformer. The results indicate that the diffuser obviously enhances methanol conversion and hydrogen production of a cylindrical methanol steam reformer. In comparison with a traditional reformer, the reformer with a diffuser of θ d = 6° and L d = 75 mm obtains the maximum enhancement of 22.96% in methanol conversion, 44.62% in hydrogen production, and 24.59% in estimated net power of fuel cell at wall temperature of 250 °C. In addition, the novel reformer with a diffuser of θ d = 9° and L d = 100 mm generates the maximum reduction of 44.17% in CO production at T W = 250 °C. |
| Databáze: | OpenAIRE |
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