مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بهینه‌سازی تجربی لایه‌های عایق ساندویچ پنل حبابدار در سیستم‌های تبرید با روش تاگوچی

نوع مقاله : مقاله پژوهشی

نویسندگان
1 گروه مهندسی مکانیک، دانشگاه آزاد اسلامی، واحد تاکستان، تاکستان، ایران
2 گروه مهندسی عمران، دانشگاه آزاد اسلامی، واحد بوئین زهرا، بوئین زهرا، ایران
چکیده
عایق‌های حرارتی ساندویچ پنل، در کاهش مصرف انرژی در ساختمان و صنعت نقش به سزایی دارند. عملکرد نهایی ساندویچ پنل‌ها به نوع عایق هسته و رویه‌ها و نیز کیفیت اتصال لایه‌ها وابسته است. در پژوهش حاضر ترکیب همزمان چهار لایه عایق پلی‌اورتان، یونولیت، ABS و فوم حبابدار در ساختار ساندویچ‌پنل دیواره یخچال به صورت آزمایشگاهی بررسی شده است. تعداد لایه‌ها و ضخامت هریک از جنس‌های مذکور می‌تواند در ضریب انتقال حرارت و مدت زمان خاموش ماندن کمپرسور یخچال تاثیرگذار باشد. روش تاگوچی برای طراحی آزمایشات ترکیب چهار ماده مذکور با تعداد و ضخامت‌های متفاوت استفاده شد. بهینه‌سازی دو هدفه شامل بیشینه‌سازی زمان خاموش ماندن کمپرسور (به عنوان معیار عملکرد حرارتی) و کمینه‌سازی هزینه ساخت (به عنوان معیار اقتصادی) مدنظر قرار گرفته است. با ساخت یک جعبه یخچال و تعبیه لایه‌های عایق بر اساس چیدمان پیشنهادی تاگوچی در یکی از دیواره‌های یخچال، زمان خاموش ماندن کمپرسور یخچال ثبت شد. نتایج نشان داد چنانچه بحث هزینه درنظر گرفته نشود، ساندویچ پنلی با یک لایه یونولیت، یک لایه پلی اورتان 8 میلی‌متری، یک لایه ABS و یک لایه فوم حبابدار 8 میلی‌متری دارای بیشترین زمان خاموش ماندن کمپرسور است. اما، با درنظرگرفتن هزینه ساخت، ساندویچ پنلی با یک لایه یونولیت، یک لایه ABS و یک لایه فوم حبابدار و بدون پلی اورتان عایق بهینه است؛که بیشینه زمان خاموش ماندن کمپرسور را با کمینه هزینه داراست. همچنین در عایق بهینه نسبت به عایق‌هایی که سه جنس یونولیت، پلی اورتان و ABS را دارند اما فاقد فوم حبابدار هستند، مصرف انرژی 25درصد کاهش یافته است.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Experimental Optimization of Bubble-Embedded Sandwich Panel Insulation Layers in Refrigeration Systems By Taguchi Method

نویسندگان English

Esmaeil Fotuhi 1
Masoumeh Rostamabadi 2
Mohamad Nikian 1
1 Mechanical Engineering Department, Tak. C., Islamic Azad University, Takestan, Iran
2 Civil Engineering Department, BuZ. C., Islamic Azad University, BuinZahra, Iran
چکیده English

Thermal insulators of sandwich panel play a significant role in reducing energy consumption in buildings and industry. The ultimate performance of sandwich panels depends on the type of core and the facing materials. In the present study, the simultaneous combination of four insulating layers—polyurethane,,EPS (expanded polystyrene),, ABS, and bubble foam—in the sandwich panel structure of a refrigerator wall was experimentally investigated. The number of layers and the thickness of each of the aforementioned materials can affect the heat transfer coefficient and, consequently, the compressor off-time duration of the refrigerator. The Taguchi method was employed to design the experiments involving different numbers and thicknesses of the four materials. A bi‑objective optimization was considered, including maximizing the compressor off‑time and minimizing the manufacturing cost (as the thermal performance and economic criterion). By constructing a refrigerator box and embedding the insulation layers according to the Taguchi‑suggested layout in one of its wall, the compressor off‑time was recorded. The results showed that, if cost is not taken into account, the sandwich panel consisting of one EPS layer, one 8‑mm polyurethane layer, one ABS layer, and one 8‑mm bubble foam layer yields the longest compressor off‑time. However, when considering the foam manufacturing cost, the optimal sandwich panel comprises one EPS layer, one ABS layer, and one bubble foam layer without the polyurethane layer. Moreover, compared with insulations containing EPS, polyurethane, and ABS without bubble foam, the optimal insulation achieves a 25% reduction in energy consumption.

کلیدواژه‌ها English

Bubble-Embedded Foam
Sandwich Panel
Taguchi
Bi‑objective optimization
Thermal insulation

 

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