英文期刊

Assessment of errors on the kinetic data by entropy generation analysis, International Journal of Hydrogen Energy, 2012, 37(17): 12365-12374




作者: N.N. Serge, F.S. Yang, Z. Wu, Z.W. Bao, Z.Z. Zhang
发表/完成日期: 2012-05-29
期刊名称: International Journal of Hydrogen Energy
期卷:
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论文简介
Abstract
Metal hydride systems are utilized in many practical applications such as hydrogen storage, heat pumps, etc. The establishment of a metal hydride system requires the expression of reaction rate for the first step design, from an engineering standpoint. However, improper experimental determination of intrinsic kinetics usually leads to significant errors in the kineticdata. This paper presents a novel methodology of estimating these errors based on the entropygenerationanalysis. For this purpose, numerical simulation is performed taking into account the experimental conditions for a real case. The results showed that if the operating conditions (i.e. hydrogen pressure, heat transfer coefficient) and the size of the experimental setup are not chosen properly, the kineticdata obtained from the experiments will be largely misled. Therefore it should be carefully taken into account in order to minimize the relative errors induced on the kineticdata.

Highlights
► The second law of thermodynamics theory is applied to study the kinetics of LaNi5. ► Two-dimensional model for entropy production during the hydriding process. ► The entropygeneration corresponds to the relative errors on the activation energy. ► The operating conditions have a great influence on the total entropygeneration.

Keywords
Thermal effect; Entropygeneration; Heat and mass transfer; Hydriding kinetics

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