کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
656984 1458058 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of enthalpy of evaporation, saturated vapor pressure and evaporation rate of aqueous nanofluids
ترجمه فارسی عنوان
بررسی آنتالپی تبخیر، فشار بخار اشباع شده و نرخ تبخیر نانوفیلد های آبی
کلمات کلیدی
سیستم خنک کننده جذب، انتالپی تبخیر، تبخیر، نانوفیلد ها، غلظت نانو ذرات، فشار بخار اشباع شده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

Al2O3 and TiO2 nanoparticles were added to deionized water to study the effects of enthalpy of evaporation, saturated vapor pressure and evaporation rate. The results show that the enthalpy of evaporation decreased with an increase of nanoparticle concentration and the larger the nanoparticle size, the smaller the enthalpy of evaporation. Two experiments were built to determine the saturated vapor pressure and the evaporation rate of nanofluids. The results show that most of the nanofluids have lower saturated vapor pressure and evaporation rate than those of water, particularly with an increase of nanoparticle concentration, but a few nanofluids with lower volume concentrations show slightly larger values than those of water. Therefore, the evaporation rate of nanofluids as well as their saturated vapor pressure, can be increased or decreased, depending on their volume concentration and the type of nanofluid. Besides, a semi-analytical model for estimating the evaporation rate of water and nanofluids as a function of temperature, humidity and air velocity was developed. After comparing the modeling results with the experiment, the agreement between them is generally good. Lastly, some nanofluids were tested as an adsorbate in an adsorption cooling system, and the results show that using 0.01% TiO2 nanofluid as the adsorbate enhances the cooling performance by about 9%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 84, May 2015, Pages 931–941
نویسندگان
, ,