Control and energy efficiency of PEM water electrolyzers in renewable energy systems

被引：104

作者：

Koponen, Joonas ^{[1
]}

Kosonen, Antti ^{[1
]}

Ruuskanen, Vesa ^{[1
]}

Huoman, Kimmo ^{[2
]}

Niemela, Markku ^{[1
]}

Ahola, Jero ^{[1
]}

机构：

[1] Lappeenranta Univ Technol, POB 20, FI-53851 Lappeenranta, Finland

[2] GreenEnergy Finland Oy, Laserkatu 6, FI-53850 Lappeenranta, Finland

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 50期

关键词：

PEM electrolyzer; Photovoltaic system; Energy storage; Efficiency; Optimization; HYDROGEN; MODEL; DEGRADATION;

D O I：

10.1016/j.ijhydene.2017.10.056

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The practical dynamic properties and operational limitations of a commercial differential pressure 1 Nm(3)h(-1) proton exchange membrane (PEM) water electrolyzer are studied from the viewpoint of renewable power production. Measured values from a 5 kW(p) solar photovoltaic (PV) power plant and PEM electrolyzer are analyzed to study factors affecting the control of PEM water electrolyzers operating as a part of renewable power production systems. Specific energy consumption of the PEM stack as a function of stack hydrogen outlet pressure is estimated based on measured values from two different measurement systems. Electrical energy consumption of the stack does not show any notable increase as the hydrogen outlet pressure is increased from 2.0 MPa to 4.0 MPa. However, the stack specific energy consumption increases by a maximum of 0.2 kWh/Nm(3) when hydrogen outlet pressure is increased from 2.0 MPa to 4.0 MPa. The increase in specific energy consumption at high differential pressure operation is due to a decrease in Faraday efficiency. Selection and control of the hydrogen outlet pressure can minimize the specific energy consumption and maximize the real hydrogen production in dynamic PEM water electrolyzer operation. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：29648 / 29660

页数：13

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