Performance characteristics and working fluid selection for high-temperature organic Rankine cycle driven by solar parabolic trough collector

被引:6
|
作者
Zhao, Wei [1 ]
Xie, Ning [1 ]
Zhang, Wei [1 ]
Yue, Jingpeng [1 ]
Wang, Lingbao [2 ]
Bu, Xianbiao [2 ]
Li, Huashan [2 ]
机构
[1] Elect Power Res Inst Guangdong Power Grid Co Ltd, Guangzhou 510080, Peoples R China
[2] Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
关键词
performance characteristics; working fluid selection; organic Rankine cycle; parabolic trough collector; multi-objective optimization; PLATE HEAT-EXCHANGERS; THERMODYNAMIC ANALYSIS; MULTIOBJECTIVE OPTIMIZATION; WASTE HEAT; SYSTEM; DESIGN;
D O I
10.1093/ijlct/ctab036
中图分类号
O414.1 [热力学];
学科分类号
摘要
In present paper, thermodynamic analysis and techno-economic assessment of an organic Rankine cycle (ORC) coupled with solar parabolic trough collector (PTC) are investigated. The thermodynamic and economicmodels, based on the principles of thermodynamics and heat transfer, aswell as dynamic economic analysis, are developed for the components of the combined system. By performing a parametric study, the effects of outlet temperature (T-PTC,T-out) and temperature difference between inlet and outlet of PTC (Delta T) and pinch point temperature difference of heat exchangers on the thermo-economic performance are evaluated. Moreover, under reasonable thermodynamic boundary conditions, the optimal operational parameters are obtained via a Pareto frontier solution. It is indicated that the improving TPTC, out is beneficial to the thermo-economic performance. Among the fluid candidates, toluene yields the best energy, exergetic and economic performance. There exists an optimal Delta T at which the thermal and exergy efficiency achieve the maximum. The optimal Delta T is 19-26 degrees C for the screened working fluids. The pinch point temperature difference of evaporator has different impact on the system performance compared with that of condenser. The evaporator pinch point temperature difference has slight influence on the economic performance when it is larger than 10 degrees C. While there is optimized condenser pinch point temperature difference (7-8 degrees C), the economic performance is the optimal. The PTC and heat exchanger are the main source of total investment cost, account for more than 75%. The Pareto frontier solutions can provide a design guide for the decision maker.
引用
收藏
页码:1135 / 1149
页数:15
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