Favorable Start-Up behavior of polymer electrolyte membrane water electrolyzers

被引：20

作者：

Rauls, Edward ^{[1
]}

Hehemann, Michael ^{[1
]}

Keller, Roger ^{[1
]}

Scheepers, Fabian ^{[1
]}

Mueller, Martin ^{[1
]}

Stolten, Detlef ^{[2
,3
]}

机构：

[1] Forschungszentrum Juelich, Inst Energy & Climate Res, IEK 14 Electrochem Proc Engn, D-52425 Julich, Germany

[2] Forschungszentrum Juelich, Inst Energy & Climate Res, IEK 3 Techno Econ Syst Anal, D-52425 Julich, Germany

[3] Rhein Westfal TH Aachen, Chair Fuel Cells, Aachen, Germany

来源：

APPLIED ENERGY | 2023年 / 330卷

关键词：

PEM electrolysis; Start-up; Heat-up; Efficiency; System modeling; Dynamic simulation; PEM ELECTROLYZER; HEAT-CAPACITY; POWER; HYDROGEN; STORAGE; COST; TEMPERATURE; MODEL;

D O I：

10.1016/j.apenergy.2022.120350

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：

Dynamically-operated water electrolyzers enable the production of green hydrogen for cross-sector applications while simultaneously stabilizing power grids. In this study, the start-up phase of polymer electrolyte membrane (PEM) water electrolyzers is investigated in the context of intermittent renewable energy sources. During the start-up of the electrolysis system, the temperature increases, which directly influences hydrogen production efficiency. Experiments on a 100 kWel electrolyzer, combined with simulations of electrolyzers with up to 1 MWel, were used to analyze the start-up phase and assess its implications for operators and system designers. It is shown that part-load start-up at intermediate cell voltages of 1.80 V yields the highest efficiencies of 74.0 %LHV compared to heat-up using resistive electrical heating elements, which reaches maximum efficiencies of 60.9 %LHV. The results further indicate that large-scale electrolyzers with electrical heaters may serve as flexible sinks in electrical grids for durations of up to 15 min.

引用

页数：12

共 43 条

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