Hybridization of Stirling Heat Engine with Solid Oxide Electrolysis Cell: Performance Prediction and Regulation Mechanism

IF 3.6 4区工程技术 Q3 ENERGY & FUELS

Energy technology Pub Date : 2024-11-19 DOI:10.1002/ente.202401491

Shaocheng Lang, Jinliang Yuan

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引用次数: 0

Abstract

Solid oxide electrolysis cell (SOEC) is an advanced green energy storage technology for achieving high-efficiency hydrogen production. However, SOEC generates redundant waste heat in exothermic mode. To improve system exergy efficiency and ensure stable and reliable operation of the SOEC, a novel hybrid system is proposed to mainly comprise an SOEC and a Stirling heat engine (SHE). Mathematical formulas for the exergy efficiency of the SOEC-SHE hybrid system are obtained and applied for this system, and it is found that the exergy efficiency is 69.90%, which is 13.77% higher than that of a single SOEC system when the operating current density is 30 000 A m⁻². A mixed orthogonal experiment method is further implemented to analyze the comprehensive effects of various parameters on the exergy efficiency of the SOEC-SHE hybrid system. Operated on the optimal combination of the investigated parameters, the exergy efficiency of the SOEC-SHE hybrid system reaches 82.35%, which is further improved by 17.81%. The results provide valuable theoretical insights for the design and operation of the SOEC-SHE hybrid system.

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斯特林热机与固体氧化物电解槽的混合：性能预测与调节机制

固体氧化物电解电池（SOEC）是实现高效制氢的先进绿色储能技术。然而，SOEC在放热模式下会产生多余的废热。为了提高系统的火用效率，保证SOEC的稳定可靠运行，提出了一种以SOEC和斯特林热机（SHE）为主的新型混合动力系统。得到了SOEC- she混合系统的火用效率数学公式，并应用于该系统，结果表明，当工作电流密度为30 000 a m−2时，该系统的火用效率为69.90%，比单个SOEC系统的火用效率提高了13.77%。进一步采用混合正交试验法分析了各参数对SOEC-SHE混合系统火用效率的综合影响。在优化的参数组合下，SOEC-SHE混合系统的火用效率达到82.35%，进一步提高了17.81%。研究结果为SOEC-SHE混合系统的设计和运行提供了有价值的理论见解。

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来源期刊

Energy technology ENERGY & FUELS-

CiteScore

7.00

自引率

5.30%

发文量

审稿时长

1.3 months

期刊介绍： Energy Technology provides a forum for researchers and engineers from all relevant disciplines concerned with the generation, conversion, storage, and distribution of energy. This new journal shall publish articles covering all technical aspects of energy process engineering from different perspectives, e.g., new concepts of energy generation and conversion; design, operation, control, and optimization of processes for energy generation (e.g., carbon capture) and conversion of energy carriers; improvement of existing processes; combination of single components to systems for energy generation; design of systems for energy storage; production processes of fuels, e.g., hydrogen, electricity, petroleum, biobased fuels; concepts and design of devices for energy distribution.