نوع مقاله : مقاله پژوهشی
موضوعات
عنوان مقاله English
نویسندگان English
Dual-channel heating, where air and fuel are injected into the cathode and anode channels, respectively, is a common method for increasing the temperature of solid oxide fuel cells (SOFCs). However, the effects of heating gases in the anode channel on the thermal performance of SOFCs have not been investigated. In this study, the heating process of an SOFC is simulated using two combinations of air–hydrogen and air–methane through a transient model based on the finite volume method. The study aims to evaluate the performance of these gas combinations in terms of heating duration and temperature gradient, under various inlet velocities and gas heating rates. The Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) multi-criteria decision-making method is then used to identify the optimal solution. The results indicate that hydrogen transfers heat to the cell structure more rapidly within a short distance after entering the channel. In contrast, air and methane distribute heat transfer over a longer flow path. Moreover, the maximum temperature gradient predominantly occurs near the gas inlet regions. In addition, the heating duration with the air–methane combination is shorter than that of air–hydrogen, with the difference becoming more pronounced at lower inlet velocities. Conversely, the effect of the heating gas type on the temperature gradient depends on the gas inlet velocity. Ultimately, the air–hydrogen combination, which results in a heating duration of 1290 s and a maximum temperature gradient of 211 K cm-1, is identified as the optimal choice according to the TOPSIS method
کلیدواژهها English
