کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4994468 1458032 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Critical heat flux enhancement in downward-facing pool boiling with radiation induced surface activation effect
ترجمه فارسی عنوان
افزایش جریان شار حرارت بالقوه در سمت چپ سوپاپ پایین با افزایش فعال شدن سطح فعال شده توسط پرتو
کلمات کلیدی
شار گرمای انتقالی، جوشاندن استخر، انتقال گرما، شانه عسل، تابش موجب فعال شدن سطح می شود، اشعه،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Ex-vessel cooling is an important concept for ensuring safety in a nuclear power plant. Many researchers have focused on critical heat flux (CHF) enhancement using reactor pressure vessels. Previous studies mainly focused on other types of enhancement methods, and few investigated the use of radiation to improve boiling heat transfer. In this study, gamma-ray radiation and electron-beam radiation are used to increase the boiling heat transfer for CHF. Initially, droplet tests are performed to check the hydrophilicity after irradiation. The results show that the contact angle decreases sharply in the irradiated materials. Then, pool boiling experiments are performed using bare and honeycomb surfaces. Gamma-ray irradiation and electron-beam irradiation of the bare surfaces cause CHF enhancements of ∼60% and 50%, respectively. However, no improvement is observed for the honeycomb surface after irradiation. The coolant amount supplied by the honeycomb to the boiling surface is believed to affect the CHF. After irradiation, the coolant amount supplied to the boiling surface does not increase. Thus, the coolant supply reaches a limit, and no further CHF enhancement is observed from the irradiated honeycomb surface. It is also observed that the irradiation source had no effect on CHF enhancement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 109, June 2017, Pages 93-102
نویسندگان
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