Comprehensive analysis and parametric optimization of a CCP (combined cooling and power) system driven by geothermal source

被引：41
作者：
Zhao, Yajing [1 ]
Wang, Jiangfeng [1 ]
Cao, Liyan [1 ]
Wang, Yu [2 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, State Key Lab Multiphase Flow Power Engn, Inst Turbomachinery, Xian 710049, Peoples R China
[2] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA
来源：
ENERGY | 2016年 / 97卷
基金：
中国国家自然科学基金;
关键词：
Exergoeconomic analysis; Exergy analysis; Geothermal energy; CCP; Optimization; ORGANIC RANKINE-CYCLE; LOW-GRADE HEAT; EXERGOECONOMIC ANALYSIS; THERMODYNAMIC ANALYSIS; THERMOECONOMIC OPTIMIZATION; GENERAL CORRELATION; ECONOMIC-ANALYSIS; BINARY-CYCLE; GAS-TURBINE; REFRIGERATION;
D O I：
10.1016/j.energy.2016.01.003
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A CCP (combined cooling and power) system, which integrated a flash-binary power generation system with a bottom combined cooling and power subsystem operating through the combination of an organic Rankine cycle and an ejector refrigeration cycle, was developed to utilize geothermal energy. Thermodynamic and exergoeconomic analyses were performed on the system. A performance indicator, namely the average levelized costs per unit of exergy products for the overall system, was developed to assess the exergoeconomic performance of the system. The effects of four key parameters including flash pressure, pinch point temperature difference in the vapor generator, inlet pressure and back pressure of the ORC turbine on the system performance were evaluated through a parametric analysis. Two single objective optimizations were conducted to reach the maximum exergy efficiency and the minimum average levelized costs per unit of exergy products for the overall system, respectively. The optimization results implied that the most exergoeconomically effective system couldn't obtain the best system thermodynamic performance and vice versa. An exergy analysis based on the thermodynamic optimization result revealed that the biggest exergy destruction occurred in the vapor generator and the next two largest exergy destruction were respectively caused by the steam turbine and the flashing device. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：470 / 487
页数：18
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