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Experimental study on superheated steam generation by the reaction of high humidity hydrogen and oxygen in a model internal combustion steam generator

机译：模型内燃蒸汽发生器中高湿度氢与氧反应产生过热蒸汽的实验研究。

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Internal combustion steam cycle (ICSC) is a novel steam power cycle using hydrogen as an energy carrier to produce superheated steam. High humidity hydrogen produced during fast hydrogen production process is directly used to produce superheated steam by combusting with stoichiometric oxygen without hydrogen storage. The ICSC efficiency is greatly affected by the content of non-condensable gas in superheated steam. In the present study, superheated steam generation by high humidity hydrogen was investigated in a model internal combustion steam generator. Effects of H2O/H-2 molar ratio of humid hydrogen and velocity ratio of humid hydrogen to oxygen on non-condensable gas content, combustion efficiency, and mixing rate were evaluated. The results showed that the critical H2O/H-2 ratio for the humid hydrogen humidity limit was 2.8. With increasing velocity ratio, mixing rate and combustion efficiency increased under the same H2O/H-2 ratio. The H2O/H-2 reaction rate monotonously decreased as the H2O/H-2 ratio increased from 1.0 to 2.5, while the mixing rate increased along with the velocity ratio. The combustion efficiency initially increased and subsequently decreased, and the peak value was reached at a H2O/H-2 ratio of 1.75. This result indicated that the humid H-2-O-2 combustion was controlled by diffusion under H2O/H-2 ratios of 1.0 to 1.75, but turned to be controlled by chemical kinetics when the H2O/H-2 ratio ranged between 1.75 and 2.5.
机译：内燃蒸汽循环（ICSC）是一种新颖的蒸汽动力循环，使用氢作为能量载体来产生过热蒸汽。快速制氢过程中产生的高湿度氢气可通过与化学计量的氧气燃烧而直接产生过热蒸汽，而无需储氢。过热蒸汽中不可冷凝气体的含量极大地影响了ICSC效率。在本研究中，在模型内燃蒸汽发生器中研究了由高湿度氢产生的过热蒸汽。评估了湿氢气的H2O / H-2摩尔比和湿氢气与氧气的速度比对不可冷凝气体含量，燃烧效率和混合速率的影响。结果表明，湿氢湿度极限的临界H2O / H-2比为2.8。随着速度比的增加，在相同的H2O / H-2比下混合速率和燃烧效率均提高。随着H2O / H-2的比值从1.0增加到2.5，H2O / H-2的反应速率单调降低，而混合速率随速度比的增加而增加。燃烧效率最初增加，随后降低，并且在H2O / H-2比为1.75时达到峰值。该结果表明，潮湿的H-2-O-2燃烧是通过在1.0至1.75的H2O / H-2比下的扩散来控制的，但是当H2O / H-2的比值在1.75至1.75之间时，则由化学动力学来控制。 2.5。

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