کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
765644 1462874 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analyzing the optimization of an organic Rankine cycle system for recovering waste heat from a large marine engine containing a cooling water system
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Analyzing the optimization of an organic Rankine cycle system for recovering waste heat from a large marine engine containing a cooling water system
چکیده انگلیسی


• Employing the thermodynamic analysis and a heat-transfer method, an ORC optimization is presented.
• An optimal objective parameter evaluation of six working fluids is presented.
• Refrigerants with superior thermodynamic properties do not necessary have excellent performance.
• Cylinder jacket water temperature strongly affects optimal evaporation temperature.

In this study, six working fluids with zero ozone depletion potential and low global warming potential are used in an organic Rankine cycle (ORC) system to recover waste heat from cylinder jacket water of large marine diesel engines. Thermodynamic analysis and a finite-temperature-difference heat-transfer method are developed to evaluate the thermal efficiency, total heat-exchanger area, objective parameter, and exergy destruction of the ORC system. The optimal evaporation and condensation temperatures for achieving the maximal objective parameter, the ratio of net power output to the total heat-transfer area of heat exchangers, of an ORC system are investigated.The results show that, among the working fluids, R600a performs the best in the optimal objective parameter evaluation followed by R1234ze, R1234yf, R245fa, R245ca, and R1233zd at evaporation temperatures ranging from 58 °C to 68 °C and condensation temperatures ranging from 35 °C to 45 °C. The optimal operating temperatures and corresponding thermal efficiency and exergy destruction are proposed. Furthermore, the influences of inlet temperatures on cylinder jacket water and cooling water in the ORC are presented for recovering waste heat. The results of this work were verified with theoretical solutions and experimental results in the literature and it was revealed that they were consistent with them.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 88, December 2014, Pages 999–1010
نویسندگان
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