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سیستمهای دالان زمینگرمایی: مروری جامع بر طراحی، عملکرد و کاربردهای موردی در گلخانههای ایران | ||
فصلنامه سیستم های انرژی پایدار | ||
دوره 4، شماره 4، مهر 1404، صفحه 405-425 اصل مقاله (1.66 M) | ||
نوع مقاله: مروری | ||
شناسه دیجیتال (DOI): 10.22059/ses.2025.393932.1136 | ||
نویسندگان | ||
داور ابراهیمی* ؛ شهریار بزرگمهری | ||
عضو هیئت علمی گروه انرژیهای تجدیدپذیر، پژوهشکدۀ انرژی و محیط زیست، پژوهشگاه نیرو | ||
چکیده | ||
استفاده از دالانهای زمینگرمایی به عنوان یکی از روشهای کارآمد در تأمین گرمایش، سرمایش و تهویۀ مطبوع، در سالهای اخیر مورد توجه قرار گرفته است. در این پژوهش، عملکرد این سیستمها از طریق بررسی نمونههای اجرایی در کشورهای مختلف و تحلیل نتایج، مورد ارزیابی قرار گرفته است. بر ایناساس، مهمترین عوامل مؤثر بر کارایی این سیستمها شامل جنس لولهها، عمق دفن، طول و قطر کانالها، نوع و رطوبت خاک اطراف، ضریب هدایت حرارتی خاک و سرعت جریان هوا هستند. انتخاب بهینۀ هر یک از این پارامترها نقش تعیینکنندهای در بهبود انتقال حرارت بین هوا و زمین و افزایش بازدهی سیستم دارد. نتایج حاصل از مطالعۀ حاضر نشان میدهد بهرهبرداری اصولی از دالانهای زمینگرمایی به صرفهجویی قابل توجه در مصرف انرژی، بهبود پایداری دمایی فضا و کاهش آلایندههای زیستمحیطی منجر میشود. همچنین، عملکرد این سیستمها در تعدادی از گلخانههای کشور مورد بررسی قرار گرفته و اثرات مثبت آن در کاهش هزینۀ نهایی تولید محصول و افزایش بهرهوری انرژی به اثبات رسیده است. در برخی از پروژههای اجراشده در گلخانههای کشور، با تغییر 10 درجهای دما باعث صرفهجویی در مصرف انرژی تا 70 درصد، و افزایش کمیت و کیفیت محصول شدهاند. این موضوع موجب تمایل بخش خصوصی به سرمایهگذاری در این حوزه شده است. با توجه به هزینۀ اولیه نسبتاً پایین، نیاز اندک به تعمیر و نگهداری و بازده مناسب در شرایط طراحی مطلوب، دالانهای زمینگرمایی به عنوان راهکاری پایدار و اقتصادی برای تأمین انرژی گلخانهها در مناطق مختلف ایران مطرح است. | ||
کلیدواژهها | ||
دالان زمین گرمایی؛ مبدل حرارتی زمین به هوا؛ بهره وری انرژی در گلخانه | ||
مراجع | ||
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