شبیه‌سازی عددی هواگرمکن خورشیدی صفحه تخت با تأثیر جاذب بهینه و شیشه دوجداره

نوع مقاله : مقاله پژوهشی

نویسندگان

علی زنگنه اینالو ¹

محمد سفید ²

محمد صالح برقی جهرمی ²

¹ گروه مهندسی مکانیک، دانشکده مهندسی مکانیک، دانشگاه یزد، یزد، ایران

² گروه مهندسی مکانیک، دانشکده مهندسی مکانیک، دانشگاه یزد، یزد، ایران.

10.22067/jacsm.2024.89384.1278

چکیده

با توجه به پایین بودن راندمان در این هواگرم کن‌ها می‌توان از روش‌هایی مانند استفاده از سطوح گسترش‌یافته روی جاذب، استفاده از شیشه ضخیم‌تر، استفاده از محیط متخلخل و تغییرات هندسی روی صفحه جاذب (موج‌دار کردن صفحه جاذب با الگوهای مختلف) استفاده کرد. در این پژوهش عددی سعی بر این است که تغییرات هندسی ایجادشده بر روی هواگرمکن خورشیدی با روش دینامیک سیالات محاسباتی بررسی شود و نتیجه آن با پژوهش‌های انجام‌شده مقایسه و حالت بهینه انتخاب گردد. با افزودن تعدادی بافل به هواگرمکن، دمای خروجی و در نتیجه بازده کلی هواگرمکن افزایش یافت که بیشترین میزان بازده کلی، مربوط به وجود سه بافل در هواگرمکن بود که بازدهی حدود 82 درصد حاصل شد. بهینه سازی تغییر فاصله هوایی (ضخامت) و شیشه تک و دوجداره بررسی شد. نتایج نشان میدهد که بهینه‌ترین ضخامت برای هواگرمکن خورشیدی صفحه تخت، ضخامت حدود 15 الی 18 سانتی‌متر است و میزان بازده در حالت شیشه دوجداره به‌مراتب بیشتر از حالت تک جداره است.

کلیدواژه‌ها

انرژی خورشیدی

هوا گرم کن خورشیدی صفحه تخت

بازده حرارتی

صفحه جاذب بهینه

شیشه دو جداره

موضوعات

• انرژی های تجدید پذیر

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عنوان مقاله English

Numerical simulation of flat plate solar air heater with optimal absorber effect and double glazed glass

نویسندگان English

Ali Zanganeh Inalo ¹

mohammad sefid ²

mohammad saleh barghi jahromi ²

¹ Department of Mechanical Engineering, Faculty of Mechanical Engineering, Yazd University, Yazd, Iran

² Department of Mechanical Engineering, Faculty of Mechanical Engineering, Yazd University, Yazd, Iran.

چکیده English

Due to the low efficiency of these air heaters, methods such as the use of expanded surfaces on the absorber, the use of thicker glass, the use of porous media, and geometric changes on the absorber plate (waving the absorber plate with different patterns) can be used. In this numerical research, an attempt is made to investigate the geometrical changes created on the solar air heater with the computational fluid dynamics method compare the result with the conducted research, and select the optimal mode. By adding several baffles to the air heater, the output temperature and as a result the overall efficiency of the air heater increased. The optimization of changing the air gap (thickness) and single and double-pane glass was investigated. The results show that the most optimal thickness for the flat plate solar air heater is about 15 to 18 cm thick and the efficiency in the case of double glazed glass is many times higher than that of single glazed glass.

کلیدواژه‌ها English

Solar Energy

Flat Plate Solar Air Heater

Thermal Efficiency

Optimal Absorber Plate

Double Glass

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