PRELIMINARY ANALYSIS AND OPTIMIZATION OF A THERMOELECTRICAL SYSTEM BASED  ON THE SUPERCRITICAL CO<sub>2</sub> CYCLE

Lei  Sun; Yong Hui Xie

doi:10.1615/HeatTransRes.2019028320

Heat Transfer Research

Éditeur en chefs: Zhixiong Guo (open in a new tab) Oleg G. Penyazkov (open in a new tab)

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ISSN Imprimer: 1064-2285

ISSN En ligne: 2162-6561

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PRELIMINARY ANALYSIS AND OPTIMIZATION OF A THERMOELECTRICAL SYSTEM BASED ON THE SUPERCRITICAL CO₂ CYCLE

Volume 51, Numéro 2, 2020, pp. 103-113

DOI: 10.1615/HeatTransRes.2019028320

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Lei Sun
Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China

Yong Hui Xie
Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China, 710049

RÉSUMÉ

A novel type of thermoelectric energy storage (TEES) utilizing supercritical carbon dioxide (S-CO₂) cycle and storage of heat in hot water is presented. It is based on the conversion of electricity into thermal energy during charge by a compressor and on the conversion of thermal energy into electricity during discharge by a turbine. In this paper, the background and a short review on TEES and S-CO₂ cycle is given firstly. Following the introduction as a general concept, the S-CO₂-based system is presented by briefly providing a description of the thermodynamic cycle and the corresponding operating conditions. Then a thermodynamic analysis is completed to obtain the relationships between the key parameters and performance of the system under design conditions after the computational models have been built. Next multiple parameters that have the most significant effect on the system performance are chosen for subsequent parameter optimization based on the calculation models. The system performance and economic cost have been optimized by multiobjective optimization, and the Pareto solution set is finally provided. The paper is concluded by discussing the engineering prospects of this system mainly dependent on technology improvements of the heat storage materials and the core equipment such as the compressor, turbine, and the heat exchanger.

MOTS CLÉS: thermoelectric energy storage, supercritical CO₂ cycle, thermodynamic analysis, multiobjective optimization

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CITÉ PAR

Sun Lei, Wang Ding, Xie Yonghui, Energy, exergy and exergoeconomic analysis of two supercritical CO2 cycles for waste heat recovery of gas turbine, Applied Thermal Engineering, 196, 2021. Crossref
Tang Bo, Sun Lei, Xie Yonghui, Comprehensive performance evaluation and optimization of a liquid carbon dioxide energy storage system with heat source, Applied Thermal Engineering, 215, 2022. Crossref