Thermodynamic Analysis of a Cogeneration System Combined with Heat, Cold, and Electricity Based on the Supercritical CO2 Power Cycle

被引：1

作者：

Zhang, Rujun ^{[1
]}

Wang, Xiaohe ^{[1
]}

Yang, Shuang ^{[1
]}

Shen, Xin ^{[1
]}

机构：

[1] Qingdao Univ, Sch Mech & Elect Engn, Qingdao 266071, Peoples R China

来源：

ENERGIES | 2024年 / 17卷 / 07期

关键词：

supercritical CO2 power cycle; CCHP system; thermodynamic analysis; S-CO2 BRAYTON CYCLE; THERMOECONOMIC ANALYSIS; EXERGETIC ANALYSIS; ENERGY; REFRIGERATION; OPTIMIZATION; FEASIBILITY; PERFORMANCE; STEAM;

D O I：

10.3390/en17071767

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：

The supercritical CO2 power cycle driven by solar as a new generation of solar thermal power generation technology has drawn significant attention worldwide. In this paper, a cogeneration system derived from a supercritical CO2 recompression Brayton cycle is proposed, by considering the recovery of waste heat from the turbine outlet. The absorption refrigeration cycle is powered by the medium-temperature waste heat from the turbine outlet, while the low-temperature waste heat is employed for heating, achieving the cascaded utilization of the heat from the turbine outlet. As for the proposed combined cooling, heating, and power (CCHP) system, a dynamic model was built and verified in MATLAB R2021b/Simulink. Under design conditions, values for the energy utilization factor (EUF) and exergy efficiency of the cogeneration system were obtained. Moreover, the thermodynamic performances of the system were investigated in variable cooling/heating load and irradiation conditions. Compared with the reference system, it is indicated that the energy utilization factor (EUF) and exergy efficiency are 84.7% and 64.8%, which are improved by 11.5% and 10.3%. The proposed supercritical CO2 CCHP system offers an effective solution for the efficient utilization of solar energy.

引用

页数：20

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