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Thermodynamic analysis of the performance of an irreversible ammonia-fed solid oxide fuel cell

Song Hanlin, Lu Zhanghao, Ma Zheshu, Guo Xinjia, Guo Qiulin

Archives of Thermodynamics

2024

Vol. 45, no 2

279--290

To investigate the performance of an irreversible direct ammonia-fed solid oxide fuel cell, the direct ammonia-fed solid oxide fuel cell based on oxygen ion conductivity was modeled using finite time thermodynamic theory. First, mathematical expressions for the output power, output efficiency, ecological objective function and ecological coefficient of performance of the direct ammonia-fed solid oxide fuel cell were derived. Further, the effects of parameters such as operating temperature, operating pressure, fuel utilization, and electrolyte thickness on the performance of direct ammonia-fed solid oxide fuel cell were numerically investigated. The results show that as the operating temperature of direct ammonia-fed solid oxide fuel cell increases, the performance of direct ammonia-fed solid oxide fuel cell including output power, output efficiency, ecological objective function and ecological coefficient of performance will be improved. Under certain conditions, increasing fuel utilization can improve output power, output efficiency and ecological performance. Increasing the electrolyte thickness will decrease the finite time thermodynamic performance of direct ammonia-fed solid oxide fuel cell. Moreover, the microstructure of the electrode also affects the performance of direct ammonia-fed solid oxide fuel cell, and the ecological objective function is increased by 16.9% when the electrode porosity is increased from 0.4 to 0.8.

Bending Measurements from Fabric Touch Tester (FTT) and Standard Methods

Binti Haji Musa A., Malengier B., Vasile S., Van Langenhove L., De Raeve A.

Autex Research Journal

2018

Vol. 18, no. 1

51--60

Fabric Touch Tester (FTT) is a relatively new device from SDL Atlas to determine touch properties of fabrics. It simultaneously measures 13 touch-related fabric physical properties in four modules that include bending and thickness measurements. This study aims to comparatively analyze the thickness and bending measurements made by the FTT and the common standard methods used in the textile industry. The results obtained with the FTT for 11 different fabrics were compared with that of standard methods. Despite the different measurement principle, a good correlation was found between the two methods used for the assessment of thickness and bending. As FTT is a new tool for textile comfort measurement and no standard yet exists, these findings are essential to determine the reliability of the measurements and how they relate to the well-established standard methods.