Si-C Foam Porous-Medium Combustion Power-Generation System for Low-Calorific-Value Biomass Syngas

  • YANG Jianwen ,
  • CHEN Wei ,
  • CAO Bingwei ,
  • LIU Xinhui ,
  • LI Hang
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  • 1. College of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China
    2. School of Mechanical and Vehicle Engineering, Changchun University, Changchun 130022, China

网络出版日期: 2025-01-09

基金资助

This research was supported by National Key Research and Development Program of China (NO. 2016YFC0802904).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

Si-C Foam Porous-Medium Combustion Power-Generation System for Low-Calorific-Value Biomass Syngas

  • YANG Jianwen ,
  • CHEN Wei ,
  • CAO Bingwei ,
  • LIU Xinhui ,
  • LI Hang
Expand
  • 1. College of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China
    2. School of Mechanical and Vehicle Engineering, Changchun University, Changchun 130022, China

Online published: 2025-01-09

Supported by

This research was supported by National Key Research and Development Program of China (NO. 2016YFC0802904).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

摘要

由生物质有机原料气化产生的合成气是清洁和可持续的能源之一。生物质能源获取简单、可再生等优点,可以满足临时供电的能源需求。本研究设计了一种适用于车载的生物质发电系统。利用生物质为原料,以FPSEG为原动机,通过燃烧生物质燃气加热FPSEG热端的方式实现了生物质能到电能的转换。本研究针对发电系统中的生物质气化系统和热电转换系统展开了匹配和关键参数设计。并利用Si-C泡沫陶瓷构建了多孔介质区域,搭建了能量转换实验平台,探究了多孔介质的床层高度、孔隙密度,多孔区域直径和不同进气量条件对发电性能的影响,并根据实验结论对热电转换系统进行了优化。具体来讲,FPSEG发电功率增长速率随着床层高度的增高先增加后减小,并在床层高度为40 mm时达到最大。多孔区域直径的增加有利于FPSEG发电功率变化率的增长,而多孔介质孔隙密度的变化对FPSEG发电功率变化率没有显著影响。随着进气量的增加,发电功率的上升速度先增加后减小。其中,当进气量为9.5 m3/h时发电功率变化率最大,当进气量为6.5 m3/h时发电系统热电转化效率最高,约45.1 %。通过对热电转换系统热惯性和燃烧结构的优化,发电系统功率上升速度提升明显,其中当进气量为9.7 m3/h时发电功率变化率达到1.8 W/s。

本文引用格式

YANG Jianwen , CHEN Wei , CAO Bingwei , LIU Xinhui , LI Hang . Si-C Foam Porous-Medium Combustion Power-Generation System for Low-Calorific-Value Biomass Syngas[J]. 热科学学报, 2025 , 34(1) : 206 -222 . DOI: 10.1007/s11630-024-2059-0

Abstract

Syngas produced from the gasification of organic feedstocks from biomass is one of the clean and sustainable sources of energy. The advantages of simple access and renewability of biomass energy can meet the energy needs of temporary power supply. This study presents a biomass power-generation system for vehicular applications. Using biomass and a free-piston Stirling engine generator (FPSEG) as the primary material and prime mover, respectively, biomass energy is converted into electricity by combusting the syngas to heat the FPSEG. Matching and key parameter design for biomass gasification and thermoelectric conversion systems within a power generation system were performed. A porous medium area was constructed using Si-C foam ceramics to obtain an energy-conversion experimental platform. The effects of bed height, porosity, porous-region diameter, and air-intake conditions on the power-generation performance were investigated, and optimisations were performed for the thermoelectric conversion system. The rate of increase during FPSEG power generation first increased and then decreased with increasing bed height, peaking at a bed height of 40 mm. An increasing porous-region diameter accelerated FPSEG power generation, whereas porosity changes in the porous media did not significantly affect the rate of change during FPSEG power generation. With increasing air intake, the rate of increase during power generation first increased and then decreased. The maximum change rate and the highest thermoelectric conversion efficiency of the power-generation system occurred at 9.5 m3/h and 6.5 m3/h (~45.1%) air intakes, respectively. Optimising the thermal inertia and combustion structure of the thermoelectric conversion system significantly increased the power-generation rate of the system, with 1.8 W/s being observed at a 9.7 m3/h air intake.

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