Study on direct electricity generation from flame radiation -Research of new theory for control and conversion of flame radiation-

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K22390
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0301:Mechanics of materials, production engineering, design engineering, fluid engineering, thermal engineering, mechanical dynamics, robotics, aerospace engineering, marine and maritime engineering, and related fields
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Sato Daisuke 長岡技術科学大学, 工学研究科, 講師 (30883897)
• Project Period (FY): 2020-09-11 – 2023-03-31
• Keywords: 燃焼 / 火炎 / 輻射＜ふくしゃ＞ / スペクトル / バイオガス / マグネシウム / 熱電変換 / 光電変換

Outline of Final Research Achievements

In this study, we examined direct electricity generation from flame radiation. Potential for two types of concepts with combustion of biogas and magnesium, which are carbon free/neutral and unutilized fuels, were clarified. (1) Small-scale combustion-driven power system, which consists of micro flames formed by oxygen combustion of biogas and thermoelectric devices, achieved generated electricity of >10 mW, demonstrating a potential for applying to independent power supplies such for IoT devices. (2) Spectral tendency of irradiance of radiation emitted from magnesium combustion flame was similar to spectral response of a crystalline silicon solar cell, resulting in that photoelectric conversion efficiency became higher than the sunlight case under same irradiance condition on the solar cell.

Free Research Field

熱工学

Academic Significance and Societal Importance of the Research Achievements

本研究では，これまで着目されていなかった火炎輻射からの直接発電のポテンシャルを，未利用のカーボンフリー／カーボンニュートラル燃料の燃焼を用いて実証した．本研究で得られた知見は，燃焼エネルギーの新たな利用形態の可能性を示すものとして学術的に意義があり，クリーンな未利用エネルギーを有効活用する新たな技術として脱炭素化社会への早期転換に資するものである．