Exergoeconomic analysis and optimization of a flash-binary geothermal power system

被引：144
作者：
Zhao, Yajing [1 ]
Wang, Jiangfeng [1 ]
机构：
[1] Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
来源：
APPLIED ENERGY | 2016年 / 179卷
基金：
中国国家自然科学基金;
关键词：
Organic Rankine cycle; Exergoeconomic analysis; Flash-binary; Geothermal energy; Optimization; ORGANIC RANKINE-CYCLE; THERMODYNAMIC ANALYSIS; PARAMETRIC OPTIMIZATION; ELECTRICITY-GENERATION; REFRIGERATION CYCLE; EXERGY ANALYSIS; WORKING FLUID; HEAT-TRANSFER; SOLAR-ENERGY; PLANT;
D O I：
10.1016/j.apenergy.2016.06.108
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In the present study, a flash-binary geothermal power system using organic Rankine cycle (ORC) as subsystem was modeled under a steady state. An exergoeconomic performance indicator, namely the average levelized cost per unit of exergy products for the overall system (c(system)), was newly developed to analyze and optimize the system. Parametric analysis was performed to examine the effects of key thermodynamic parameters including flash pressure, ORC turbine inlet pressure and ORC turbine inlet temperature on the system performance. Exergoeconomic optimization for minimum csystem was carried out on the system. As comparison, thermodynamic optimization for maximum exergy efficiency was also conducted. Optimization results implied that the most exergoeconomically effective system couldn't obtain the best system thermodynamic performance and vice versa. It was shown that in exergoeconomics the significant improvement in system's economy is at the expense of the slight diminishment in system's thermodynamic performance. Therefore, the exergoeconomic models developed in the current study provide comprehensive understanding of geothermal power systems as well as useful guidelines for designers. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：159 / 170
页数：12
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