کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7053800 | 1458012 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental investigation of single bubble growth in the boiling of the superheated liquid mixed refrigerants
ترجمه فارسی عنوان
بررسی تجربی رشد تک حباب در جوش مایع سوپر تبخیر شده
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
مبرد منفجره، نرخ رشد حباب، توزیع توده، سرما خوردگی موثر،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The reduction of the bubble growth rate in mixed liquid refrigerants is one of the main reasons for the reduction of the boiling heat transfer coefficient. To study the mass diffusion effect and the reduction of the bubble growth rate in boiling of non-azeotropic mixtures, an experiment was conducted to investigate the bubble growth rates of R142b, R134a, isobutane and R142b/R134a mixtures in a vertical transparent quartz tube. The pressure used in this experiment ranged from 0.2 to 0.47â¯MPa, and the superheats ranged from 1.5 to 23.3â¯Â°C. Moreover, in order to obtain a uniformly superheated liquid, the bubbles were grown at a single nucleation site, and the departure frequency for the successive bubbles was lower than 20â¯Hz. Experimental bubble growth constants were obtained, and the reliability of the experimental study was supported by theoretical models for pure refrigerants. Additionally, for the study of bubble growth rate in binary mixtures, the attenuation factors for superheat were calculated and compared with different proposed models. The experimental attenuation factors were much smaller than the calculated results. Thus, a correlation was identified, and the errors were primarily in the range of â30% to +30%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 127, Part A, December 2018, Pages 553-565
Journal: International Journal of Heat and Mass Transfer - Volume 127, Part A, December 2018, Pages 553-565
نویسندگان
Jiaji He, Jinping Liu, Xiongwen Xu,