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首页> 外文会议>American Society of Mechanical Engineers(ASME) Summer Heat Transfer Conference(HT2005); 20050717-22; San Francisco,CA(UA) >HEAT TRANSFER ENHANCEMENT OF STEAM-REFORMATION BY PASSIVE FLOW DISTURBANCE INSIDE THE CATALYST BED
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HEAT TRANSFER ENHANCEMENT OF STEAM-REFORMATION BY PASSIVE FLOW DISTURBANCE INSIDE THE CATALYST BED

机译：催化剂床内的被动流动扰动强化了传热的传热

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摘要

Because of the potential for high efficiency and low emissions, hydrogen powered fuel cell systems are considered to be the next generation power source for both stationary and transportation applications. Providing a hydrogen source to feed a fuel cell is a critical challenge. Steam reforming processes are demonstrated for producing hydrogen for fuel cell and other applications. Generating hydrogen via steam reformation requires that heat energy be transferred to the reactants to support the endothermic reaction. For a cylindrical steam-reforming reactor, large thermal gradients between the heat source (reactor wall) and reactor centerline create a non-ideal condition for complete conversion. This gradient is caused by insufficient heat transfer inside the catalyst bed. Passive flow disturbance inside the catalyst bed provides a potential to enhance the heat and mass transfer in the steam reforming process. This paper presents experimental research that investigates the effect of changing the flow pathway inside the reactor to improve the heat and mass transfer and thus enhance fuel conversion. The results of this study contribute to the improvement of reformer design for better fuel processing system performance.
机译：由于具有高效率和低排放的潜力，氢燃料电池系统被认为是固定和运输应用的下一代电源。提供氢源以供给燃料电池是关键的挑战。事实证明，蒸汽重整工艺可为燃料电池和其他应用生产氢气。通过蒸汽重整产生氢需要将热能转移至反应物以支持吸热反应。对于圆柱形蒸汽重整反应堆，热源（反应堆壁）和反应堆中心线之间的较大热梯度会为完全转化创造非理想条件。该梯度是由催化剂床内部的传热不足引起的。催化剂床内部的被动流动扰动提供了在蒸汽重整过程中增强热量和质量传递的潜力。本文提出了实验研究，旨在研究改变反应堆内部流动路径以改善热量和质量传递从而提高燃料转化率的效果。这项研究的结果有助于改进重整器设计，以改善燃料处理系统的性能。

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