کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
644829 | 1457134 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimization of mixed working fluids for a novel trigeneration system based on organic Rankine cycle installed with heat pumps
ترجمه فارسی عنوان
بهینه سازی مایعات کاری مخلوط برای یک سیستم سه گانه جدید مبتنی بر چرخه رادین اورانیوم نصب شده با پمپ های حرارتی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A novel combined cooling, heating and powerorganic Rankine cycle (CCHP-ORC) system installed with heat pumps is presented in this paper. The CCHP-ORC system using zeotropic mixtures is first discussed, and this work is focused on selecting optimal zeotropic mixtures and determining the component concentration that gives a better performance. A system model under an idealized operating condition was built. The heat source is geothermal water whose temperature is 95â°C, and the mass flow is 40ât/h. The heat transfer fluid is heated to 45â°C for heating with the ambient temperature of â5â°C, and the refrigerating fluid is cooled to 0â°C with the ambient temperature of 35â°C. In this paper, 20 zeotropic mixtures were analyzed. The evaluation index net output power, heating capacity, refrigerating capacity, coefficient of performance (COP), economic thermal efficiency and exergy efficiency were calculated with the changing evaporation temperature under the condition of ejector coefficient 0.2. The ejector coefficient and evaporation temperature had been analyzed as independent variables. The results showed that R141b/R134a, R141b/R152a and R123/152a have a higher COP and exergy efficiency than others. By analyzing the component concentration of the optimized three kinds of zeotropic mixtures, it can be inferred that a mixture of dry and wet working fluids is more suitable for the system. The system gives rise to higher energy output if zeotropic mixtures are made of a higher proportion of wet working fluid and a lower proportion of dry working fluid.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 94, 5 February 2016, Pages 754-762
Journal: Applied Thermal Engineering - Volume 94, 5 February 2016, Pages 754-762
نویسندگان
Zishen Li, Weiyi Li, Borui Xu,