微型高比功率热声斯特林发电机实验研究
Experimental Study of a Miniature High Specific Power Thermoacoustic Stirling Generator
肖望 1余国瑶 2马英 3马壮 3成阳斌 3罗二仓1
作者信息
- 1. 低温科学与技术重点实验室,中国科学院理化技术研究所,北京 100190;中国科学院大学,北京 100049
- 2. 低温科学与技术重点实验室,中国科学院理化技术研究所,北京 100190;齐鲁中科光物理与工程技术研究院,济南 251000
- 3. 低温科学与技术重点实验室,中国科学院理化技术研究所,北京 100190
- 折叠
摘要
高比功率百瓦级便携电源在户外运动、应急救灾等场景有着重要需求.热声斯特林发电机因其外燃属性而燃料选择性广泛,同时兼具高效、紧凑、可靠和静音等特点,是构建便携式电源系统的重要发电技术.本文首次提出采用螺旋管束式热端换热器来提升燃烧-交变流动换热性能和比功率.首先基于热声学的阻抗匹配和燃烧传热耦合,设计并研制了一套百瓦级热声斯特林发电系统;然后实验考察了不同工作压力、负载、燃烧功率下的输出特性;最后开展了损失分析.初步实验结果表明,该发电系统在管壁侧烟气温度为765℃时的最大输出电功为415 W,以柴油热值计算的对应热电效率为13.9％.受益于135 Hz的超高工作频率和轻量化设计,发电机本体的比功率达到112 W/kg,展现出突出的应用潜力.
Abstract
A highly efficient,portable power supply capable of delivering several hundred watts is in high demand for applications such as outdoor sports and emergency relief efforts.The external combustion thermoacoustic Stirling generator is a key technology for developing such power sys-tems due to its fuel flexibility,high efficiency,compactness,reliability,and quiet operation.This paper presents a novel approach using a spiral tube hot-end heat exchanger to enhance combustion-alternating flow heat transfer performance and specific power.A 300-watt-class thermoacoustic Stirling power generation system is designed and constructed,leveraging impedance matching and combustion-heat transfer coupling.The system's output characteristics are experimentally examined under varying operating conditions,and a comprehensive loss analysis is conducted.Preliminary ex-perimental results show that the power generation system achieves a maximum output electrical power of 415 W at a flue gas temperature of 765℃,with a corresponding thermoelectric efficiency of 13.9％based on the diesel calorific value.With an ultra-high operating frequency of 135 Hz and lightweight design,the generator body achieves a specific power of 112 W/kg,demonstrating significant application potential.
关键词
超高频/螺旋管束换热器/热声斯特林/输出特性Key words
ultra-high frequency/spiral tube hot-end heat exchanger/thermoacoustic stirling ge-nerator/output characteristics引用本文复制引用
基金项目
国家自然科学基金面上项目(52306031)
国家自然科学基金面上项目(51876214)
出版年
2024
NETL
NSTL
万方数据