Development of a powerful miniature power system with a meso-scale vortex combustor
Development of a powerful miniature power system with a meso-scale vortex combustor
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DOI：
10.1016/j.proci.2016.06.180
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
D. Shimokuri;Y. Taomoto;R. Matsumoto
中科院分区：
文献类型：
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作者：
D. Shimokuri;Y. Taomoto;R. Matsumoto
利用中尺度涡流燃烧室和热电装置，研制了一种功率强大的微型动力系统。在52 × 52 × 13 mm的热介质中制作了一个内径为10 mm的涡流燃烧室，在热介质上放置了一对热电装置。以丙烷为燃料，考察了Pin = 400、500和600 W三种热输入条件下的系统输出。结果表明，系统输出在点火后5分钟内达到稳态。系统最大输出功率随热输入的增加而增加，当Pin = 600 W时，最大输出功率为18.1 W（11.3 V × 1.6A），转换效率为3.01%。18.1 W的系统输出高于目前任何其他微型燃烧动力系统，与其他高热输入（Pin> 100 W）的动力系统相比，转换效率也很高。对小型涡流燃烧室的加热效率和对流换热进行了分析。其结果是，确认了涡旋燃烧器的加热效率相当高，即，在所有实验条件下，85%的热输入有效地用于加热热介质，70%的输入热被供应到TED并用于发电。传热分析结果表明，气体的旋涡运动对窄缝通道内的传热有明显的强化作用。这种特性有助于高效率加热，并因此有助于涡流燃烧动力系统的相当高的输出功率以及高的系统效率。
With the use of a meso-scale vortex combustor and a couple of thermo-electric devices (TED), a powerful miniature power system has been developed. A vortex combustor with a 10-mm inner diameter was fabricated inside of a heat medium of 52 × 52 × 13-mm, on which a couple of thermo-electric devices were placed. Propane was used as fuel, and the system outputs are examined for three thermal input conditions ofPin= 400, 500 and 600 W. Results show that, the system output reached a steady state within 5-minutes after ignition. The maximum system output increased with the thermal input, and reached a maximum of 18.1 W (11.3 V × 1.6A) forPin= 600 W, with a 3.01% conversion efficiency. The system output of 18.1 W is higher than any currently available other miniature combustion power system, and the conversion efficiency is also high compared to that of other power systems with high thermal input (Pin> 100 W). Analyses have been made on the heating efficiency and convective heat transfer of the small scale vortex combustor. As a result, it was confirmed that the heating efficiency of the vortex combustor is considerably high, that is, 85% of the thermal input was effectively used to heat the heat medium, and 70% of the input heat was supplied to the TED and used for power generation for all experimental conditions. The results of the heat transfer analysis showed that the heat transfer in the narrow channel was significantly enhanced by the vortex motion of the gas. This characteristic contributes to the high efficiency heating, and hence, the considerably high output power as well as the high system efficiency of the vortex combustion power system.