Performance Analysis and Evaluation of a Supercritical CO2 Rankine Cycle Coupled with an Absorption Refrigeration Cycle

被引:0
|
作者
CHEN Yi [1 ,2 ]
XU Dongjie [1 ]
CHEN Zheng [1 ]
GAO Xiang [2 ]
REN Fukang [3 ]
HAN Wei [4 ]
机构
[1] China Electric Power Planning & Engineering Institute
[2] College of Energy Engineering, Zhejiang University
[3] Power and Mechanical Engineering, North China Electric Power University
[4] Institute of Engineering Thermophysics, Chinese Academy of Sciences
基金
中国博士后科学基金;
关键词
supercritical CO2 cycle; absorption refrigeration cycle; sensible heat source; solar energy; thermodynamic analysis;
D O I
暂无
中图分类号
TB616 [];
学科分类号
0807 ; 080705 ;
摘要
The utilization of sensible waste heat such as flue gas and industrial surplus heat is essential for energy saving. Supercritical CO2 power generation cycle is a promising way to be used in this field. In this paper, a new supercritical CORankine cycle coupled with an absorption refrigeration cycle is proposed, which consists of a reheating supercritical COcycle, a mixed-effect Li Br-HO absorption refrigeration cycle and solar subsystem including evacuated-tube collector and a hot water storage tank. The system has four variants according to the presence or absence of solar subsystem and net cooling energy output. The thermodynamic model of the proposed system was established and its performance was evaluated. The proposed system is able to realize cascade utilization of flue gas waste heat and efficient conversion of solar energy. It has much higher thermodynamic efficiency than the reference system(i.e., the conventional supercritical COBrayton cycle). Taking combined power and cooling system driven by flue gas waste heat and solar energy as an example, its thermal efficiency and exergy efficiency are 20.37% and 54.18% respectively, compared with the 14.74% and 35.96% of the reference system. Energy Utilization Diagrams(EUD) are implemented to investigate the irreversible losses and variation of the exergy destruction in the energy conversion process. Parametric analysis in two key parameters is conducted to provide guidance for the system optimal design.
引用
收藏
页码:1036 / 1052
页数:17
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