高功率便携式生物质燃烧驱动温差发电机的研发
李国能 , 应杰 , 伊敏波 , 郑友取 , 汤元君 , 郭文文
工程(英文) ›› 2023, Vol. 24 ›› Issue (5) : 192 -201.
高功率便携式生物质燃烧驱动温差发电机的研发
Development of a High-capacity Portable Biomass-combustion-powered Thermoelectric Generator
利用生物质燃烧产生电力是贫困地区解决照明、通信和医疗等基本需求的重要方式。本文开发和测试了一种高功率便携式生物质燃烧驱动的温差发电机(biomass-combustion-powered thermoelectric generator, BCP-TEG),详细研究了其温差分布、功率负载特性和不同层级的效率,并开展了现场应用测试。研究结果发现该温差发电机在自身质量为7.6 kg 的条件下可同时产生750 W的热力和23.4 W的电力,热电联供效率达到32.3%。温差发电机的发电净功率密度为2.41 W·kg−1,均高于文献报道的所有基于闭式循环冷却的发电净功率密度。此外,利用本文开发的温差发电机,燃烧1 kg 的木条所发出的电能可充满一个容量为6.2 A·h 的3.7 V锂电池。最后,本文详细讨论了BCP-TEG 研究领域存在的问题和未来可研究的方向。
Generating electricity from biomass combustion is an essential means of supporting basic demands in deprived regions, including lighting, communication, and medical care. In this work, a high-capacity portable biomass-combustion-powered thermoelectric generator (BCP-TEG) is developed and tested. Temperature distribution, power load feature, efficiencies at different levels, and a field test are comprehensively explored. The results show that the proposed 7.6 kg BCP-TEG can cogenerate a heating power of 750 W and an electric power of 23.4 W, corresponding to a combined heat and power (CHP) efficiency of 32.3%. The net power density of 2.41 W·kg−1 is much greater than those in previous reports based on water closed-loop cooling. Furthermore, this study demonstrates that a 3.7 V battery of 6.2 A·h can be fully charged by burning 1 kg of wood sticks. Finally, we provide a comprehensive discussion identifying existing issues and future opportunities in this field.
Biomass / Thermoelectric generator / Combined heat and power / Overall efficiency
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