Numerical Study on Heat Transfer Enhanced in a Microcombustor With Staggered Cylindrical Array for Micro-Thermophotovoltaic System
| Autor: | Cheng Hu, Hu Fan, Haojie Li, Yunfei Yan, Yangrong Chen, Shuai Feng |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment 020209 energy Mechanical Engineering Energy Engineering and Power Technology 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Combustion Fuel Technology Geochemistry and Petrology Thermophotovoltaic Heat transfer 0202 electrical engineering electronic engineering information engineering Cylindrical array Combustion chamber 0210 nano-technology |
| Zdroj: | Journal of Energy Resources Technology. 140 |
| ISSN: | 1528-8994 0195-0738 |
| DOI: | 10.1115/1.4040191 |
| Popis: | In consideration of high heat transfer efficiency and stable combustion, a new type of microplanar combustor for micro-thermophotovoltaic (micro-TPV) system is proposed, in which the heat transfer is enhanced by staggered cylindrical array. The numerical study results indicate that the temperature of radiation wall of cylindrical-array combustor is higher and more uniform comparing with the conventional-channel combustor, the application of cylindrical-array make the effective radiation of the combustor increase 34.55% and reach to 35.98 W. Moreover, with inlet velocity increase from 4 m/s to 16 m/s, the cylindrical-array combustor shows the better stability of combustion, which the position of the flame moves 4.8 mm in the cylindrical-array combustor and 9.1 mm in the conventional-channel combustor. However, the 0.5–4.5 equivalence ratio range for stable combustion is slightly narrower than 0.4–6.0 in the conventional-channel combustor. To extend the equivalence ratio range, one row of cylindrical array was canceled, and the distribution length of cylindrical array was reduced to 10 mm, After this improvement, the equivalence ratio range is extended to 0.3–5.5, and the negative effect on the flame stability of the cylindrical array is basically eliminated. |
| Databáze: | OpenAIRE |
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