بررسی ترمواکونومیک خشک‌کن خورشیدی کابینتی با کلکتور لوله خلأ وذخیره کننده انرژی

علوم کاربردی و محاسباتی در مکانیک

مقاله 3، دوره 32، شماره 1 - شماره پیاپی 23، 1399، صفحه 39-58   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/jacsm.2021.56640.0

نویسندگان

محمد صالح برقی جهرمی¹؛ مسعود ایرانمنش¹؛ هادی صمیمی اخیجهانی^{* 2}

¹گروه پژوهشی انرژی‌های تجدیدپذیر و تبدیل انرژی، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان.

²استادیار، گروه مهندسی بیوسیستم دانشکدۀ کشاورزی، دانشگاه کردستان، کردستان.

چکیده

در این تحقیق تاثیر استفاده از مواد تغییر فاز دهنده (PCM) در مخرن ذخیره کننده حرارت بر عملکرد یک خشک‌کن خورشیدی، مورد بررسی قرار گرفت. آزمایش‌ها برای PCM در سه سطح 54/1، 45/2، 6/3 کیلوگرم و برای دبی سیال در دو سطح 2/0 و 4/0 لیتر بر دقیقه انجام شد. با افزایش دبی سیال بازده حرارتی جمع‌کننده از 2/20 تا 4/62 درصد تغییر می‌کند. نتایج نشان داد تغییرات انرژی حرارتی برای دبی سیال 2/0 و 4/0 لیتر بر دقیقه به ترتیب بین 31/13 تا 63/13 و 45/14 تا 92/14 مگاژول به‌دست آمد. همچنین نتایج نشان داد بازده کلی خشک‌کن با افزایش PCM افزایش یافته و تغییرات آن برای دبی 2/0 لیتر بر دقیقه از 92/32 تا 55/35 درصد و برای دبی 4/0 لیتر بر دقیقه 19/32 تا 02/36 درصد است. با توجه به مقادیر انرژی ویژه و بازده کلی خشک‌کن، دبی 2/0 لیتر بر دقیقه با مقدار PCM به میزان 6/3 کیلوگرم گزینه مناسبی برای خشک‌کردن می‌باشد. دوره بازگشت سرمایه برای سامانه حدود 20 ماه به‌دست آمد.

کلیدواژه‌ها

انرژی خورشیدی؛ بازده حرارتی جمع کننده؛ دبی حجمی سیال؛ مواد تغییر فاز دهنده

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