掺氢天然气驱动的温差发电特性研究

摘要/Abstract

摘要：

【目的】温差发电 (thermoelectric generation，TEG)是应对极端天气和电力故障引发家庭供电中断的有效解决方案之一，而将掺氢天然气与TEG结合，可显著降低碳排放量。因此，掺氢天然气在TEG中的发电特性值得深入研究。【方法】采用大气式燃烧方式，以掺氢天然气为燃料，对其在温差发电系统中的发电特性进行试验研究。通过改变输入功率、掺氢比例和负载电阻值，分析TEG系统的温度、发电功率、系统效率和污染物排放等指标。【结果】试验结果表明：TEG系统的热端温度、温差发电功率和系统效率与输入功率呈正相关关系；系统存在最佳负载电阻值，此时发电功率达到最大值(75.8 W)，显著高于同类以掺氢烷烃燃烧驱动TEG的功率最高值，系统效率为3.03%；CO和CO₂的排放浓度随掺氢比增加而逐渐降低，当掺氢比例为5%时，烟气中CO质量浓度值为38.22 mg/m³，优于目前国内外以烷烃或掺氢烷烃为燃料燃烧驱动TEG研究的报道值。【结论】当掺氢比例低于20%时，掺氢天然气对传统天然气具有较强的替代能力。

关键词: 掺氢天然气燃烧, 温差发电, 新能源消纳, 掺氢比例, 自供气, 功率负载特性, 发电功率, 系统效率, 污染物排放 , 试验研究

Abstract:

[Objectives] Thermoelectric generation (TEG) is one of the effective solutions to address power interruptions caused by extreme weather and power outages. Integrating hydrogen compressed natural gas with TEG can significantly reduce carbon emissions. Therefore, the power generation characteristics of hydrogen compressed natural gas in TEG systems warrant indepth investigation. [Methods] In this study, a series of experiments were conducted using atmospheric combustion with hydrogen compressed natural gas as fuel to examine its thermoelectric performance. By varying input power, hydrogen blend ratio, and load resistance, the temperature, power output, system efficiency, and pollutant emissions of the TEG system are analyzed. [Results] The experimental results show that the hot-end temperature, thermoelectric power output, and system efficiency of the TEG system exhibit a positive correlation with input power. The system has an optimal load resistance value, at which the power output reaches its maximum value (75.8 W), significantly exceeding the highest power output reported for comparable thermoelectric generator systems driven by the combustion of hydrogen-blended alkanes. Under this condition, the system efficiency reached 3.03%. The concentrations of CO and CO₂ in the flue gas decrease as the hydrogen blend ratio increases. When the hydrogen blending ratio is 5%, the CO mass concentration in the flue gas is 38.22 mg/m³, which is superior to the reported values in current domestic and international studies on alkane or hydrogen compressed alkane-fueled TEG systems. [Conclusions] The results show that when the hydrogen blend ratio is below 20%, hydrogen compressed natural gas exhibits strong potential as an alternative to traditional natural gas.

Key words:

text-align:justify, "> hydrogen compressed natural gas combustion, thermoelectric generation, new energy accommodation, hydrogen blending ratio, self-gas supply, power-load characteristics, generating power, systematic power generation efficiency, pollutant emissions, experimental study

张琳, 王绪刚, 郑友取, 吕康博, 刘柳, 黎长乐. 掺氢天然气驱动的温差发电特性研究[J]. 发电技术.

ZHANG Lin, WANG Xugang, ZHENG Youqu, LÜ Kangbo, LIU Liu, LI Changle. Study on the Power Generation Characteristics of Hydrogen Compressed Natural Gas-driven Thermoelectric Generator[J]. Power Generation Technology.

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