آنالیز حساسیت و بهبود عملکرد پیل سوختی غشا پلیمری

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی مکانیک، دانشگاه خواجه نصیرالدین طوسی، تهران، ایران

10.22078/pr.2020.3945.2799

چکیده

با افزایش آلودگی زیست‌محیطی استفاده از انرژی‌های تجدیدپذیر اهمیت بالایی پیدا کرده است. پیل سوختی غشا پلیمری، یکی از روش‏های تولید انرژی تجدیدپذیر است که به‌دلیل بسیاری از مزایای آن، مانند انتشار کم آلودگی و راندمان بالا، در طیف وسیعی از زمینه‏ها به کار رفته است. در پیل سوختی، ابعاد اجزاء نقش مهمی در عملکرد آن دارد. در این پژوهش، حل عددی در حالت پایا، سه‌بعدی، دوفاز و دما ثابت انجام شد. اثر ابعاد سطع مقطع کانال، ضخامت غشا، ضخامت لایه‏ نفوذ گاز، ضخامت لایه کاتالیست و اندازه شانه کانال بر عملکرد پیل سوختی غشا پلیمری مطالعه گردید. این آنالیز شامل مطالعه دو شاخص حداکثر چگالی توان و میانگین چگالی جریان است که در طیف وسیعی از ولتاژ‏های عملیاتی بررسی می‏گردد. نتایج نشان می‏دهد که تعیین ابعاد مناسب برای اجزاء پیل، تأثیر زیادی بر بهبود عملکرد می‏گذارد. با مقایسه اثر ابعاد برروی این شاخص‏ها، رتبه‌بندی متفاوتی به‏دست می‏آید. کاهش عرض کانال و ضخامت غشا پلیمری بیش‏ترین نقش را در تعیین عملکرد پیل دارد. تطابق خوبی بین نتایج شبیه‌سازی عددی و داده‏های تجربی حاصل گردید.
 

کلیدواژه‌ها


عنوان مقاله [English]

Sensitive Analysis and Performance Enhancement of Proton Exchange Membrane Fuel Cell

نویسندگان [English]

  • Mehrdad Ghasabei
  • Mehrzad Shams
Department of Mechanical Engineering, Khajeh Nasir Toosi University of Technology, Tehran, Iran
چکیده [English]

Due to increasing environmental pollution, the use of renewable energies is very important. Proton Exchange Membrane Fuel Cell (PEMFC) is for producing renewable energy, which is applied in a wide range of fields due to its many merits, such as low emissions, high power density and high efficiency. Dimension of components of PEMFC plays an important role on its performance. In this article, Numerical solution are performed by assuming two phase, steady and isothermal. The effect of channel dimensions and thickness of gas diffusion layer, catalyst layer and membrane were studied on the performance of the PEMFC. This analysis involves studying two indicators of maximum power density and average current density, which it was investigated in a wide range of voltage operations. The results show that determining proper dimensions for cell components has a great impact on the performance. By comparing the effect of dimensions on two indicators, different rankings are obtained. Channel width and thickness of polymer membrane have the most important role in determining cell performance. Good correspondence between numerical results and experimental data is achieved.
 

کلیدواژه‌ها [English]

  • PEMFC
  • Power Density
  • Current Density
  • Sensitive Analysis
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