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Title: Performance comparison of low-grade ORCs (organic Rankine cycles) using R245fa, pentane and their mixtures based on the thermoeconomic multi-objective optimization and decision makings
Author: Feng, Yongqiang1; Hung, TzuChen2; Zhang, Yaning1; Li, Bingxi1; Yang, Jinfu3; Shi, Yang1
Source: ENERGY
Issued Date: 2015-12-15
Volume: 93, Pages:2018-2029
Keyword: ORCs (organic Rankine cycles) ; Thermoeconomic optimization ; Levelized energy cost (LEC) ; Mixture working fluids ; Decision makings
DOI: 10.1016/j.energy.2015.10.065
DOC Type: Article
English Abstract: Based on the thermoeconomic multi-objective optimization and decision makings, considering both exergy efficiency and LEC (levelized energy cost), the performance comparison of low-grade ORCs (organic Rankine cycles) using R245fa, pentane and their mixtures has been investigated. The effects of mass fraction of R245fa and four key parameters on the exergy efficiency and LEC are examined. The Pareto-optimal solutions are selected from the Pareto optimal frontier obtained by NSGA-II algorithm using three decision makings, including Shannon Entropy, LINMAP and TOPSIS. The deviation index is introduced to evaluate different decision makings. Research demonstrates that as the mass fraction of R245fa increasing, the exergy efficiency decreases first and then increases, while LEC presents a reverse trend. The optimum values from TOPSIS decision making are selected as the preferred Pareto-optimal solution for its lowest deviation index. The Pareto-optimal solutions for pentane, R245fa, and 0.5pentane/0.5R245fa in pairs of (exergy efficiency, LEC) are (0.5425, 0.104), (0.5502, 0.111), and (0.5212, 0.108), respectively. The mixture working fluids present lower thermodynamic performance and moderate economic performance than the pure working fluids under the Pareto optimization. (C) 2015 Elsevier Ltd. All rights reserved.
WOS Headings: Science & Technology ; Physical Sciences ; Technology
WOS Subject: Thermodynamics ; Energy & Fuels
WOS Subject Extended: Thermodynamics ; Energy & Fuels
WOS Keyword Plus: WASTE HEAT-RECOVERY ; ZEOTROPIC MIXTURES ; WORKING FLUIDS ; POWER-GENERATION ; KALINA CYCLE ; EXERGY ; PURE ; EFFICIENCY ; CONVERSION ; SELECTION
Indexed Type: SCI
Language: 英语
WOS ID: WOS:000367409500073
Citation statistics:
Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112321
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

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description.institution: 1.Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Peoples R China
2.Natl Taipei Univ Technol, Dept Mech Engn, Taipei, Taiwan
3.Chinese Acad Sci, Inst Engn Thermophys, Beijing, Peoples R China
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