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Study of thermal integration issues and heat loss pathways in a planar microscale fuel processor: Demonstration of an integrated silicon microreactor based methanol steam reformer.

机译：平面微型燃料处理器中的热集成问题和热损失途径的研究：基于集成硅微反应器的甲醇蒸汽重整器的演示。

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The onboard extraction of hydrogen by processing easily stored, high density liquid hydrocarbons seems to be the most promising method of supplying high purity hydrogen to proton exchange membrane fuel cells (PEMFCs) for portable power. Microreactor technology is a promising approach to harnessing the high energy density of hydrocarbons and is being used to produce hydrogen-rich gases by reforming of methanol and other liquid hydrocarbons. A number of crucial challenges exist for the realization of practical portable fuel processor and fuel cell systems. Based on the literature and research conducted, several of the key issues are identified. Miniaturization of system components and thermal management in miniature systems are perhaps the most crucial challenges for portable fuel processors.; Silicon microfabrication technology was explored to achieve miniaturization. In this study, a silicon microreactor-based catalytic methanol steam reforming reactor was designed, fabricated, and demonstrated in the context of complete thermal integration to understand the crucial issues and to develop a knowledge base required to rationally design and integrate the microchemical components of a fuel processor. Detailed thermal and reaction experiments were carried out to demonstrate the potential of microreactor-based on-demand H2 generation. Based on thermal characterization experiments, the heat loss mechanisms and effective convective heat coefficients from the planar microreactor structure were determined. The result provided fundamental insight of critical thermal transfer issues such as transfer of heat between reactor components, control of' temperature, insulation, and heat losses. Based on this understanding, suggestions are{09} made for scale up of reactor components and a packaging scheme for reduction of convective and radiative losses.; Keywords. portable power, microreactor, PEMFC, methanol reformer, fuel process thermal management

机译：通过处理易于存储的高密度液态碳氢化合物的车载提取似乎是向便携式电力的质子交换膜燃料电池（PEMFC）供应高纯度氢的最有前途的方法。微反应器技术是利用碳氢化合物的高能量密度的一种有前途的方法，并且被用于通过重整甲醇和其他液态碳氢化合物来生产富氢气体。实现实用的便携式燃料处理器和燃料电池系统存在许多关键挑战。根据文献和进行的研究，确定了几个关键问题。对于便携式燃料处理器而言，系统组件的小型化和微型系统中的热管理可能是最关键的挑战。探索了硅微制造技术以实现小型化。在这项研究中，基于硅微反应器的催化甲醇蒸汽重整反应器的设计，制造和演示是在完全热集成的背景下进行的，以了解关键问题并开发合理设计和集成甲醇微化学成分所需的知识库。燃料处理器。进行了详细的热和反应实验，以证明基于微反应器的按需生成H2的潜力。基于热表征实验，确定了平面微反应器结构的热损失机理和有效对流热系数。结果为关键的热传递问题提供了基本的见识，例如反应堆组件之间的热传递，温度，绝缘和热损失的控制。基于这种理解，提出了一些建议{09}，以扩大反应堆的组件，并提出减少对流和辐射损失的包装方案。关键字。便携式电源，微反应器，PEMFC，甲醇重整器，燃料过程热管理

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作者
Shah, Keyur.;
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作者单位

Stevens Institute of Technology.;

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授予单位 Stevens Institute of Technology.;
学科 Engineering Chemical.
学位 Ph.D.
年度 2007
页码 218 p.
总页数 218
原文格式 PDF
正文语种 eng
中图分类化工过程（物理过程及物理化学过程）;
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专利

1. Understanding thermal integration issues and heat loss pathways in a planar microscale fuel processor:Demonstration of an integrated silicon microreactor-based methanol steam reformer [J] . Keyur Shah, R.S.Besser Chemical engineering journal . 2008,第Suppla1期

机译：了解平面微型燃料处理器中的热集成问题和热损失途径：基于硅微反应器的集成甲醇蒸汽重整器的演示
2. Methanol steam reforming in a planar wash coated microreactor integrated with a micro-combustor [J] . M. Andisheh Tadbir, M.H. Akbari International journal of hydrogen energy . 2011,第20期

机译：在与微燃烧器集成的平面洗涤涂层微反应器中进行甲醇蒸汽重整
3. Performance evaluation and comparison of fuel processors integrated with PEM fuel cell based on steam or autothermal reforming and on CO preferential oxidation or selective methanation [J] . Giuliana Ercolino, Muhammad A. Ashraf, Vito Specchia, Applied Energy . 2015,第apra1期

机译：基于蒸汽或自热重整以及基于CO优先氧化或选择性甲烷化的与PEM燃料电池集成的燃料处理器的性能评估和比较
4. Addressing Critical Issues in Microscale Fuel Processing: Demonstration of AnIntegrated Silicon Microreactor Based Methanol Steam Reformer [C] . Keyur Shah, R.S.Besser 40th Annual Loss Prevention Symposium . 2006

机译：解决微型燃料处理中的关键问题：基于硅微反应器的集成甲醇蒸汽重整器的演示
5. An Experimental Study of Enhanced Thermal Conductivity Utilizing Columnated Silicon Microevaporators for Convective Boiling Heat Transfer at the Microscale. [D] . Hogue, Christopher William. 2011

机译：利用柱状硅微蒸发器提高热导率的微尺度对流沸腾传热的实验研究。
6. Heat penetration attributes of milkfish (Chanos chanos) thermal processed in flexible pouches: a comparative study between steam application and water immersion [O] . Mary A. Adepoju, Bamidele O. Omitoyin, Chitradurga O. Mohan, 2017

机译：柔性袋中热加工的遮目鱼（Chanos chanos）的热渗透特性：蒸汽施加和水浸之间的比较研究
7. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

机译：本文提供了一个新的数值模型，该模型描述了暴露于高太阳热通量（高于1 / MW / m2）的热厚木材样品的行为。基于无量纲数的初步研究用于对问题进行分类并支持模型构建假设。然后，提出了一种基于质量，动量和能量平衡方程的模型。这些方程式与液体蒸汽干燥模型和假物种生物质降解模型耦合。通过与以前的实验研究进行比较，初步结果表明，这些方程不足以准确预测高太阳热通量下的生物量行为。的确，在样品暴露的表面上形成了充当辐射屏蔽层的炭层。除了这套经典的方程式之外，还必须考虑到辐射向介质的渗透。此外，由于生物质中含有水，因此还必须在炭蒸气汽化后进行连续的介质变形。最后，通过添加这两种策略，该模型能够在一定范围的样品初始水分含量下暴露于高辐射热通量的情况下，正确捕获生物质的降解。还得出了在高太阳热通量下生物量行为的其他见解。样品内部同时存在干燥，热解和气化前沿。这三个热化学前沿的共存会导致样品干燥产生的蒸汽产生焦炭气化，这是介质烧蚀的主要现象。
8. Geothermal Energy Market Study on the Atlantic Coastal Plain: A Review of Recent Energy Price Projections for Traditional Space and Process Heating Fuels in the Post-1985 Period [R] . Barron, W. 1980

机译：大西洋沿岸平原地热能市场研究 - 1985年后传统空间和工艺加热燃料近期能源价格预测回顾

Study of thermal integration issues and heat loss pathways in a planar microscale fuel processor: Demonstration of an integrated silicon microreactor based methanol steam reformer.

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