Energy and exergetic evaluations of Bunsen section of the sulfur–iodine thermochemical hydrogen production plant
Energy and exergetic evaluations of Bunsen section of the sulfur–iodine thermochemical hydrogen production plant
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DOI：
10.1016/j.ijhydene.2013.05.031
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发表时间：
2013-07
影响因子：
7.2
通讯作者：
S. Dehghani;Hoseyn Sayyaadi
中科院分区：
文献类型：
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作者：
S. Dehghani;Hoseyn Sayyaadi
氢是硫碘（S-I）热化学循环的主要产物，它是由水作为原料产生的。在这个循环中，水通过几个化学过程分解成氢和氧。提供循环热过程所需的热能可由核能或聚光太阳能提供。这个循环包括三个主要部分，其中水与硫和碘的可循环中间化合物反应如下：(I)本生反应部分，（II）硫酸分解和（III）碘化氢分解。本生反应器产生两种主要的酸性溶液，以促进其他部分的水分解。本文通过综合的能量和火用分析对本生反应堆进行了评价。本生反应器的性能通过应用能量和火用方面的不同参数研究作为反应变量和参考环境温度的函数来分析。在125℃的恒定反应温度下，参考环境温度从- 25℃升高到55℃时，火用效率约为97% ~ 98.5%，而参考环境温度为25℃时，在115℃~ 135℃的反应温度范围内，火用效率约为97.3% ~ 97.5%。
Hydrogen is the main product of sulfur–iodine (S–I) thermochemical cycle which is generated from water as a feed. In this cycle, water is splitted into hydrogen and oxygen through several chemical processes. The required heat energy for supplying thermal process demands of the cycle can be provided from nuclear energy or concentrated solar energy sources. This cycle consists of three main sections, in which water reacts with recyclable intermediate compounds of sulfur and iodine as follows: (I) Bunsen reaction section, (II) sulfuric acid decomposition and (III) hydrogen iodide decomposition. Bunsen reactor produces two main acidic solutions for facilitating water decomposition in other sections. In this paper, the Bunsen reactor was evaluated through a comprehensive energy and exergy analyses. Performance of the Bunsen reactor was analyzed by applying diverse parametric studies on aspects of energy and exergy as a function of the reaction variable and reference-environment temperatures. At a constant reaction temperature of 125 °C, the exergetic efficiency varied from approximately 97%–98.5% when the reference-environment temperature increased from −25 °C to 55 °C while these values for reference-environment temperature of 25 °C were in the range of 97.3%–97.5% in the reaction temperature range of 115 °C–135 °C.