خنک‌کاری مجموعه باتری‌های لیتیوم-یون بااستفاده از نانوسیال توسط چاه حرارتی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده فنی و مهندسی، دانشگاه شهرکرد، شهرکرد، ایران

2 دانشکده فنی و مهندسی،دانشگاه شهرکرد، شهرکرد، ایران

چکیده

در پژوهش حاضر خنک­کاری مجموعه­ای از باتری‌های لیتیوم- یون (انباره)، توسط چاه حرارتی (heat sink) میکروکانالی دارای میکرولوله­های موجی‌شکل به‌همراه نانوسیال نقره- (آب- اتیلن گلیکول50%) بررسی شده‌است. برای حل معادلات و کوپل میدان سرعت و فشار، از نرم­افزار انسیس- فلوئنت و روش سیمپل (Simple) استفاده شده‌است. نتایج نشان می‌دهد، این سیستم می­تواند دمای انبارۀ لیتیوم- یون را بین 295 تا 305 درجۀ کلوین حفظ کند و در تمام غلظت­های مطالعه‌شده، ماکزیمم اختلاف دمایی در سطح انباره، به‌ترتیب 5 و 7 درجۀ کلوین است. هم‌چنین مشخص شد که افزایش غلظت نانوسیال دمای یکنواخت­تری را برای انباره فراهم می­آورد و در رینولدزهای بالاتر، اگرچه توزیع دما یکنواخت­تر است اما افزایش غلظت نانوسیال اثر محسوسی ندارد، مثلا ًدر 300Re = با افزایش غلظت از صفر تا 1%، بهبود یکنواختی دمای سطح 5/4% است. از طرفی افزایش عدد رینولدز بر قدرت پمپاژ سیال خنک­کننده تأثیر منفی دارد. هم‌چنین نرخ تولید آنتروپی حرارتی و اصطکاکی با افزایش کسر حجمی نانوذرات کاهش می‌یابد به‌طوری‌که در غلظت 1% میزان کاهش آنتروپی اصطکاکی نسبت‌به سیال خالص برابر 9% است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Cooling of lithium-ion battery assemblies using nanofluids by heat sink

نویسندگان [English]

  • Akram Jahanbakhshi 1
  • Afshin Ahmadi Nadooshan 1
  • Morteza Bayareh 2
1 Engineering Faculty- Shahrekord University,- Shahrekord - Iran
2 Shahrekord University
چکیده [English]

In the present study, the cooling of a pack of lithium-ion batteries in micro-channel heatsink with wavy microtubes was investigated in the presence of silver/water-ethylene glycol (50:50) nanofluid. ANSYS FLUENT software and SIMPLE method are used to solve the equations and coupling of velocity and pressure fields. The results show that this system can maintain the lithium-ion temperature between 295 and 305 K. At all studied concentrations, the maximum temperature difference at the surface is 5 and 7 K, respectively. It is also found that increasing the nanofluid concentration provides a more uniform temperature. At higher Reynolds numbers, although the temperature distribution is more uniform, increasing the nanofluid concentration has no significant effect. For example, at Re = 300, the improvement of surface temperature uniformity is 4.5% with increasing the concentration from zero to 1%. On the other hand, an increment in the Reynolds number has a negative effect on the pumping power of the coolant. Also, the rate of thermal and frictional entropy generation decreases with the volume fraction of nanoparticles, so that at a concentration of 1%, the rate of reduction of frictional entropy relative to pure fluid is 9%.

کلیدواژه‌ها [English]

  • Lithium-ion battery cooling
  • heat sink
  • microchannel
  • microtube
  • Nanofluid
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