تحقیقات موتور

تحقیقات موتور

تأثیر فشار بر بازده حرارتی سامانة مدیریت گرمائی انباره مبتنی بر مادة تغییر حالت‏‌دهنده برای قوای محرکة برقی

نوع مقاله : مقاله پژوهشی

نویسندگان
دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران
چکیده
برای محدود کردن حداکثر دما در انباره­‌های لیتیوم یونی، از سامانة مدیریت گرمائی انباره استفاده می‌­شود. مدیریت گرمائی مبتنی بر مادة تغییر حالت‏‌دهنده بهترین مصالحه بین هزینه‌، یکپارچگی، کارایی و چرخة عمر است. برای افزایش عملکرد مواد تغییر حالت‏‌دهنده در سامانه‌‏­های مدیریت گرمائی، لازم است خواص هدایت گرمائی آنها بهبود یافته و ظرفیت ذخیرة انرژی آنها نیز افزایش یابد. هدف از این تحقیق معرفی فشار به عنوان ابزاری برای افزایش قابلیت ذخیرة انرژی در چند اتیلن گلیکول-هزار  برای دستیابی به مدیریت گرمائی کارآمدتر انباره است. آزمایش‏‌ها با در نظر گرفتن متغیرهای ورودی، فشار100 الی500 کیلو پاسکال (کیپ)، و نرخ تخلیة 1 تا 7  انجام شد. اثرات متغیرهای ورودی بر روی حداکثر دما، عمق تخلیه و انرژی تخلیه در طول فرآیند تخلیه یک خانه‏ استوانه‌ای لیتیوم یونی 18650 بررسی می‏‌شود. دمای خانه‏، 63 درجة سانتیگراد (دس) به عنوان حداکثر دمای ایمن در نظر گرفته شد. نتایج نشان می‌دهد برای نرخ تخلیة  7، فشار 500 کیپ تقریباً زمان تخلیه انباره را  نسبت به فشار متعارفی تا دو برابر افزایش می­‌دهد. علاوه بر این، افزایش فشار از 100 به 500 کیپ انرژی استخراج شده از خانه‏ انباره را دو برابر کرد.
کلیدواژه‌ها

عنوان مقاله English

Impact of pressure on thermal efficiency of phase change material-based BTMS for electric powertrain

نویسندگان English

Ali Shafiei Fini
Ayat Gharehghani
School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
چکیده English

To efficiently control high temperatures in lithium-ion batteries, a Battery Thermal Management System (BTMS) is employed. Among various thermal management techniques, the one based on Phase Change Materials (PCMs) is considered to strike the best balance between cost, integration, efficiency, and lifespan. To enhance the performance of PCMs in thermal management systems, it is crucial to improve their thermal conductivity and energy storage capacity. This research aims to utilize pressure as a method to boost the energy storage capability of PEG1000 for better battery thermal management. The study considers two input factors: pressure (100-500 kPa) and discharge rate (1-7 C). The investigation examines the impact of these variables on the maximum temperature, depth of discharge, and discharge energy during the discharge process of a 18650 cylindrical cell. A safe maximum temperature of 63 degrees Celsius was established. Results showed that at a discharge rate of 7 C, a pressure of 500 kPa nearly doubled the battery's discharge time compared to atmospheric pressure. Additionally, increasing the pressure from 100 to 500 kPa doubled the energy extracted from the battery cell.

کلیدواژه‌ها English

Phase Change Material
Battery Thermal Management
Polyethylene Glycol 1000
Pressure
Lithium ion Battery
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  • تاریخ دریافت 13 اردیبهشت 1403
  • تاریخ بازنگری 14 مهر 1403
  • تاریخ پذیرش 17 مهر 1403