کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6685462 | 501860 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An improved configuration of lignite pre-drying using a supplementary steam cycle in a lignite fired supercritical power plant
ترجمه فارسی عنوان
یک پیکربندی پیشرفته پیش خشک کردن زغالسنگ با استفاده از یک چرخه بخار تکمیل شده در یک نیروگاه فوق بحرانی شونده با زغالسنگ
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کلمات کلیدی
قبل از خشک شدن زغالسنگ، گرمای فوق العاده چرخه بخار اضافی تجزیه و تحلیل ترمودینامیکی، تحلیل اقتصادی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
A novel concept of improved configuration of lignite pre-drying using a supplementary steam cycle incorporated in a lignite fired supercritical power plant was proposed in this study. Differing from the conventional lignite pre-drying power plant configuration, in this lignite pre-drying power plant (LPDPP) concept, the steam bleeds for the dryer and some regenerative heaters (RHs) are redirected from the high pressure turbines and low pressure turbines through a separate turbine named the Regenerative-turbine (R-turbine). With the R-turbine in place, the degree of super-heating of the bleeds for the dryer and for RH3-RH5 is significantly reduced, thus leading to a reduction in the heat transfer temperature difference and exergy destruction rate. The net energy efficiency and the economic benefits of the proposed LPDPP are also enhanced as compared to the conventional configuration. The analysis showed that, for a 600Â MW supercritical LPDPP, the exergy destruction of the dryer could be reduced from 14.23Â MWth in the conventional configuration to 13.25Â MWth in the proposed design. The net energy efficiency could be further improved by 0.3 percentages points with a heat rate reduction of approximately 59.4Â kJ/kWÂ h. The net economic benefit of the proposed LPDPP could reach $47.6Â M per year, which is $0.9Â M greater than that of the conventional lignite pre-drying unit.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 160, 15 December 2015, Pages 882-891
Journal: Applied Energy - Volume 160, 15 December 2015, Pages 882-891
نویسندگان
Cheng Xu, Gang Xu, Shifei Zhao, Luyao Zhou, Yongping Yang, Dongke Zhang,