کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4909696 1427348 2017 12 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Heat transfer and frictional resistance characteristics of the water wall tube of an ultra-supercritical CFB boiler
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
سفارش ترجمه تخصصی
با تضمین قیمت و کیفیت
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Heat transfer and frictional resistance characteristics of the water wall tube of an ultra-supercritical CFB boiler
چکیده انگلیسی


- The optimized tube exhibits good performance under ultra-supercritical parameters.
- Increased mass flux or decreased heat flux delay heat-transfer deterioration.
- Heat flux and pressure have dominant effects on frictional pressure drop.
- The specific fitting correlations show good agreement with test data.

This paper presents an investigation of the flow and heat transfer characteristics of the water wall tube of an ultra-supercritical circulating fluidized bed (CFB) boiler for a better boiler design. The operating pressure ranges from 10.5 to 32 MPa. The six-headed inner rifled tube used in the test has a diameter and wall thickness of 35 mm and 5.67 mm, respectively. Results show that the vapor quality during heat-transfer deterioration (vapor quality >0.8) increases with increased mass flux or decreased heat flux in the subcritical pressure regions. The effects of the pressure and heat flux on the inner-wall temperature in the supercritical pressure region are remarkable in the high-enthalpy region (enthalpy >2400 kJ kg−1). The effects of the heat flux and pressure on frictional pressure drop are more dominant than mass flux in both the subcritical and supercritical pressure regions. The optimized tube is found to exhibit good performance under ultra-supercritical parameters.

188

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 128, October 2017, Pages 279-290
نویسندگان
, , , , ,
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
سفارش ترجمه تخصصی
با تضمین قیمت و کیفیت