کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8072464 1521408 2018 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecular property methods for assessing efficiency of organic Rankine cycles
ترجمه فارسی عنوان
روش های اموال مولکولی برای ارزیابی کارایی چرخه های رابینین آلی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
This paper presents a robust method for assessing the efficiency of organic Rankine cycle (ORC) plants based on the molecular structures of the working fluids employed. The developed methodology uses molecular group contribution methods and does not require equations of state or extensive experimental data. The maximum utilization efficiency ɳu* of an ORC plant was correlated with two thermodynamic properties of the working fluid, namely, its critical temperature Tc and reduced ideal gas heat capacity Cp0/R. The developed correlations predict ɳu* with an average error of 0.9-1.5 percentage points. The optimum ORC heat source temperature Ths* can be predicted with an average error of 3.5 °C to 6.6 °C. The developed methodology was validated using a numerical model of an optimized ORC. It was then used to estimate ɳu* and Ths* of 92 working fluids with low global warming potentials (GWP100 < 150) and low flammability values (LFL > 0.1 kg/m3). Lastly, best candidate next-generation, low-GWP working fluids were selected for a more detailed examination.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 142, 1 January 2018, Pages 108-120
نویسندگان
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