燃烧室
燃烧
材料科学
核工程
点火系统
夹带(生物音乐学)
工艺工程
热力学
化学
工程类
节奏
哲学
有机化学
美学
物理
作者
Emily Lin,C Wilson,Arny Leroy,Bachir El Fil
标识
DOI:10.1016/j.enconman.2023.117014
摘要
The increasing demand for low-cost, high energy density heat sources has motivated the development of compact and lightweight combustion-based devices. In this work, we developed an energy-dense (≈236 MW/m3) entrainment-based catalytic micro-combustor for heating portable systems. The multichannel micro-combustor (coated with Pt/Al2O3 catalyst) leverages a copper-nichrome wire to enable quick and localized ohmic preheating durations (2–3 mins). Furthermore, we demonstrated low ignition temperature (108–125 °C), which facilitates low energy consumption (∼1948 J). In addition, an optimal fuel flow rate (3.09 × 10-8 m3/s) was determined via FEM simulations and experiments to enable fuel savings (high fuel conversion) while achieving high heat fluxes by analyzing the reaction kinetics and species transport behavior in the microchannels. Through independent testing, we established the micro-combustor’s ability to maintain long-term autothermal combustion at a high saturation wall temperature (585 °C), which was attained at short timescales to enable fast heating/cooling cyclability. The successful cyclic heating demonstration of large thermal mass additions (at least 41 times the micro-combustor’s mass), coupled with the combustor’s high energy density, shows promise for device-level implementation for a range of commercial, defense, and energy conversion applications.
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