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首页> 外文学位 >Evaporative heat and mass transfer with solubility driven solidification of aqueous droplet flows.
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Evaporative heat and mass transfer with solubility driven solidification of aqueous droplet flows.

机译：蒸发热和传质以及溶解度驱动的水滴流动的固化。

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Nuclear-based hydrogen production via thermochemical water decomposition using a copper-chlorine cycle consists of a series of chemical reactions that split water into hydrogen and oxygen. This is accomplished through reactions involving intermediate copper and chlorine compounds, which act as catalysts that are recycled in the process. In this thesis, analytical and numerical solutions are developed to predict the behaviour of aqueous cupric chloride droplets in a solution undergoing spray-drying in the Cu-Cl cycle. The aqueous CuCl2 is present as a slurry within the cycle, which will later generate oxygen and hydrogen as a net result. The efficiency of the cycle can be increased by utilizing low-grade waste heat from any industrial source or nuclear power plant to assist in the drying process. There are many different methods employed in industry for drying of solutions. Each method has its own advantages and disadvantages, depending on the application and conditions. In this thesis, analytical correlations of heat and mass transfer are developed for the aqueous solution, subject to various drying conditions. The analysis is performed for moist air in contact with a sprayed aqueous solution of CuCl2(2H2O). Validation of the model is performed by comparisons with experimental results obtained from a Niro-spray dryer for CuCl2 and previous experimental and theoretical data for different fluids, on the basis of non-dimensional analysis.
机译：通过使用铜-氯循环的热化学水分解产生的核基氢包括一系列将水分解为氢和氧的化学反应。这是通过涉及中间体铜和氯化合物的反应来完成的，这些中间体在反应过程中作为催化剂循环使用。在本文中，开发了解析和数值解决方案来预测在Cu-Cl循环中经历喷雾干燥的溶液中氯化铜水溶液的液滴行为。 CuCl 2水溶液在循环中以淤浆的形式存在，随后将最终产生氧气和氢气。通过利用来自任何工业来源或核电厂的低等级废热来协助干燥过程，可以提高循环效率。工业上有许多不同的方法用于溶液的干​​燥。每种方法都有各自的优缺点，具体取决于应用程序和条件。本文研究了在各种干燥条件下水溶液的传热与传质的解析关系。对潮湿空气与喷雾的CuCl2（2H2O）水溶液接触进行分析。该模型的验证是通过与从Niro喷雾干燥器获得的CuCl2的实验结果进行比较，以及在无量纲分析的基础上对不同流体的先前实验和理论数据进行比较来进行的。

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