کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5011196 | 1462475 | 2017 | 10 صفحه PDF | دانلود رایگان |
The paper investigates the variants of intercooler effectiveness on exergo-economic and exergo-sustainability indicators of modified Brayton cycles. The objective is to ascertain how the variant in the intercooler effectiveness affects the exergy-based parameters. However, to achieve this, a component by component exergy-cost balances was established. The considered cycles include: the non-specific cycle (Case 1) comprising a gas turbine (GT), intercooler (IC), heat exchanger (HE) and reheat system (REH), others include (GT+H+REH +ST, Case 2), (GT+HE +IC +REH +ST+FWH, Case 3) and (GT+HE+IC+REH +ST+2 FWH, Case 4). The calculated cycle efficiencies (Cases 1-4) varies from 17.59% to 28.84% for intercooler effectiveness of 0.75 and 0.95. The exergy destruction within this range was 0.97%, 1.26%, 0.89% and 1.23% (Cases 1, 2 3 and 4) respectively. The component exergy destruction cost (CEDC) fluctuated between 3.85â¤CEDCâ¤229.1$/hr,5.61Eâ06â¤CEDCâ¤229.1$/h,1.46Eâ06â¤CEDCâ¤229.1$/hr and 5.61Eâ06â¤CEDCâ¤229.1$/hr for same order. Additionally, the exergo-sustainability indicators: exergy waste ratio (EWR), environmental effect factor (EFF) and exergetic sustainability index (ESI) were estimated between 17.59â¤EEFâ¤28.84%,0.433â¤EWRâ¤0.6359, 1.55 ⤠EFF ⤠3.60 and 0.277 ⤠ESI ⤠0.644. Conclusively, the intercooler and other modifications have a marginal effect but Cases 4 and 3 was most sustainable with considerable ESI.
Journal: Case Studies in Thermal Engineering - Volume 10, September 2017, Pages 9-18