کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8948759 | 1645683 | 2019 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of soil moisture contents on thermal performance of earth-air-pipe heat exchanger for winter heating in arid climate: In situ measurement
ترجمه فارسی عنوان
تأثیر محتوای رطوبت خاک بر عملکرد حرارتی مبدل حرارتی زمین-هوا-لوله برای گرمایش زمستانی در آب و هوای خشک: اندازه گیری در محل
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
چکیده انگلیسی
Earth-air-pipe heat exchanger (EAPHE) system is a passive system but requires long pipes for heat transfer and its performance also gets deteriorated during continuous operation. In this study, the moisture content of sub-soil is increased in the close vicinity of EAPHE pipe and its influence on thermal performance and pipe length requisite for certain temperature rise in winter season have been determined. The system comprises of two identical set-ups of EAPHE system buried at a depth of 3.7âm (one for dry soil, other for wet soil). A unique water impregnation system is presented to maintain different soil moisture content levels in the close vicinity of EAPHE pipe. The knee point for dry EAPHE system is obtained at a pipe length of 40âm from inlet section while in wet EAPHE system knee point is obtained at 28âm, 27âm and 26âm with 5%, 10%, and 15% soil moisture levels respectively, after 12âh of continuous operation. The average heat transfer rate and coefficient of performance increase up to 26.0% and 26.1% respectively, for 15% moisture content at 30âm length of EAPHE pipe as compared to dry system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geothermics - Volume 77, January 2019, Pages 12-23
Journal: Geothermics - Volume 77, January 2019, Pages 12-23
نویسندگان
Kamal Kumar Agrawal, Tejpal Yadav, Rohit Misra, Ghanshyam Das Agrawal,