کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4990843 | 1457101 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamic comparison of three small-scale gas liquefaction systems
ترجمه فارسی عنوان
مقایسه ترمودینامیکی سه سیستم مایع سازی گاز کوچک
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کلمات کلیدی
گاز مایع شدن، بهینه سازی فرآیند، مدل سازی فرآیند، بهینه سازی چند هدفه، تجزیه و تحلیل اگزرژی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Natural gas liquefaction systems are based on refrigeration cycles, which can be subdivided into the cascade, mixed refrigerant and expander-based processes. They differ in their configurations, components and working fluids, and have therefore various operating conditions and equipment inventory. The present work investigates three configurations suitable for small-scale applications because of their simplicity and compactness: the single-mixed refrigerant, single and dual reverse Brayton cycles. The impact of different feed compositions and refrigerant properties is analysed. A detailed assessment of the energy and exergy flows is conducted, and the most promising cycle layouts are identified by performing multi-objective optimisation procedures. The findings illustrate the resulting trade-offs between the system performance and size in different operating conditions. Mixed-refrigerant processes prove to be more efficient (1000-2000Â kJ/kgLNG) than expander-based ones (2500-5000Â kJ/kgLNG) over larger ranges of operating conditions, at the expense of a greater system complexity and higher thermal conductance (250-500Â kW/K against 80-160Â kW/K). The results show that the use of different thermodynamic models leads to relative deviations of up to 1% for the power consumption and 20% for the network conductance. Particular caution should thus be exercised when extrapolating the results of process models to the design of actual gas liquefaction systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 128, 5 January 2018, Pages 712-724
Journal: Applied Thermal Engineering - Volume 128, 5 January 2018, Pages 712-724
نویسندگان
Tuong-Van Nguyen, Erasmus Damgaard Rothuizen, Wiebke Brix Markussen, Brian Elmegaard,