کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5013340 1462834 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Energy and exergy analysis of a closed Brayton cycle-based combined cycle for solar power tower plants
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Energy and exergy analysis of a closed Brayton cycle-based combined cycle for solar power tower plants
چکیده انگلیسی
Concentrating Solar Power (CSP) technology offers an interesting potential for future power generation and research on CSP systems of all types, particularly those with central receiver system (CRS) has been attracting a lot of attention recently. Today, these power plants cannot compete with the conventional power generation systems in terms of Levelized Cost of Electricity (LCOE) and if a competitive LCOE is to be reached, employing an efficient thermodynamic power cycle is deemed essential. In the present work, a novel combined cycle is proposed for power generation from solar power towers. The proposed system consists of a closed Brayton cycle, which uses helium as the working fluid, and two organic Rankine cycles which are employed to recover the waste heat of the Brayton cycle. The system is thermodynamically assessed from both the first and second law viewpoints. A parametric study is conducted to examine the effects of key operating parameters (including solar subsystem and power cycle parameters) on the overall power plant performance. The results indicate that exergy efficiencies of higher than 30% are achieved for the overall power plant. Also, according to the results, the power cycle proposed in this work has a better performance than the other investigated Rankine and supercritical CO2 systems operating under similar conditions, for these types of solar power plants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 128, 15 November 2016, Pages 227-237
نویسندگان
, ,