Prediction of production power for high-pressure hydrogen by high-pressure water electrolysis

Onda, Kazuo; Kyakuno, Takahiro; Hattori, Kikuo; Ito, Kohei

doi:10.1016/j.jpowsour.2004.01.046

Cited by 182 publications

(106 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…7) [11]. Above this voltage, the behaviour is that shown by the near-linear portion of the voltage-current plot (○, Fig.…”

Section: Lifetime Performance and Degradation Mechanismmentioning

confidence: 85%

“…8 (R p +R el =0.0125 Ω for the 1,728 h fitted curve and R p +R el =0.0125 Ω and R short =0.165 Ω for the 1,782 h fitted curve). The dotted line has been drawn at the thermo-neutral voltage of 1.48 V [11] density clearly show a decrease in the value of R short with increased time of current passage.…”

Section: Lifetime Performance and Degradation Mechanismmentioning

confidence: 96%

“…The hydrogen generation efficiency was calculated based upon thermo-neutral voltage, V thn , of 1.48 V [11]. Current efficiency was determined by measuring the hydrogen gas flow exiting and that expected for a given charge flow.…”

Section: Cell and Stack Evaluationmentioning

confidence: 99%

“…Equivalent circuit representation of a normal cell (no internal short circuiting), circuit 1, and a damaged cell with internal electronic short through the membrane, circuit 2. I t =total current flowing through the circuit; I Faradaic =Faradaic current which goes towards hydrogen and oxygen generation; I short =short circuiting current responsible for loss in hydrogen generation efficiency; R p = polarisation resistance (activation and concentration) at the electrode/electrolyte interface; C dl =double layer capacitance at the electrode/electrolyte interface; R el =total ohmic losses consisting of resistance of electrolyte membrane, support materials, current collection plates and contact resistances; R short =total short circuit resistance consisting of a number of parallel short circuit resistors (R s1 , R s2 -R sn ), each representing a short circuit path through the membrane; V t =total voltage drop across the cell; and V thn thermoneutral voltage [11] . Efficiency of up to 87% initially at 1 A cm −2 has been achieved through optimisation of interface, catalyst, MEA fabrication, fluid/current flow and stack design.…”

Section: Technology Demonstrationmentioning

confidence: 99%

See 3 more Smart Citations

Hydrogen and oxygen generation with polymer electrolyte membrane (PEM)-based electrolytic technology

Badwal

Giddey

Ciacchi

2006

Ionics

View full text Add to dashboard Cite

With dwindling liquid fuel resources, hydrogen offers a credible alternative. The use of hydrogen in a fuel cell offers the highest fuel conversion efficiency compared with all other technologies and it also has the potential to substantially reduce greenhouse gas and particulate emissions at least at the end-user sites. One of the major barriers to the introduction of the hydrogen economy and its wider acceptance is the lack of the rather costly hydrogen generation, transportation and distribution infrastructure to meet the local transport fuel demands. On-site or distributed hydrogen generation would remove the need for this up-front infrastructure requirements and assist with the early large-scale trials of the fuel cell technology for both transport and stationary applications and also introduction of the hydrogen economy. In this paper, the development of polymer electrolyte membrane electrolysis technology for on-site, on-demand hydrogen generation has been discussed. The major emphasis is given on reducing catalyst cost; interface design and modifications; interconnect materials, design and fabrication; and investigation of the sources of degradation. Stacks to 2 kW H2 capacity have been constructed and tested and show initial efficiencies of >87% at 1 A cm −2 .

show abstract

“…7) [11]. Above this voltage, the behaviour is that shown by the near-linear portion of the voltage-current plot (○, Fig.…”

Section: Lifetime Performance and Degradation Mechanismmentioning

confidence: 85%

Section: Lifetime Performance and Degradation Mechanismmentioning

confidence: 96%

Section: Cell and Stack Evaluationmentioning

confidence: 99%

Section: Technology Demonstrationmentioning

confidence: 99%

See 2 more Smart Citations

Hydrogen and oxygen generation with polymer electrolyte membrane (PEM)-based electrolytic technology

Badwal

Giddey

Ciacchi

2006

Ionics

View full text Add to dashboard Cite

show abstract

“…There have also been conducted several studies on the influence of the electrolysis pressure on the energy efficiency, although it seems that there is still no general agreement about this question. In this regard, Onda et al [12] have pointed out that high-pressure water electrolysis consumes up to 5% less energy than atmospheric water electrolysis. Rzayeva et al [13] have agreed with this effect.…”

Section: Electrolyzer Parameters and Improvementsmentioning

confidence: 99%

Optimum Alkaline Electrolyzer-Proton Exchange Membrane Fuel Cell Coupling in a Residential Solar Stand-Alone Power System

Khater

Abdelraouf

Beshr

2011

ISRN Renewable Energy

View full text Add to dashboard Cite

Modeling of an alkaline electrolyzer and a proton exchange membrane fuel cell (PEMFC) is presented. Also, a parametric study is performed for both components in order to determine the effect of variable operating conditions on their performance. The aim of this study is to determine the optimum operating conditions when the electrolyzer and the PEMFC are coupled together as part of a residential solar powered stand-alone power system comprising photovoltaic (PV) arrays, an alkaline electrolyzer, storage tanks, a secondary battery, and a PEMFC. The optimum conditions are determined based on an economic study which is performed to determine the cost of electricity (COE) produced from this system so as to determine the lowest possible COE. All of the calculations are performed using a computer code developed by using MATLAB. The code is designed so that any user can easily change the data concerning the location of the system or the working parameters of any of the system's components to estimate the performance of a modified system. Cairo city in Egypt was used as the place at which the output of the system will be determined. It was found that the optimum operating temperature of the electrolyzer is 25 • C. Also, the optimum coupling pressure of the electrolyzer and the PEMFC is 4 bars. The operating temperature of the PEMFC had a slight effect on its performance while an optimum current density of 400 mA/cm 2 was detected. By operating the fuel cell at optimum conditions, its efficiency was found to be 64.66% with a need of 0.5168 Nm 3 (Nm 3 is a m 3 measured at temperature of 0 • C and pressure of 1 bar) of hydrogen to produce 1 kWh of electricity while its cogeneration efficiency was found to be 84.34%. The COE of the system was found to be 49 cents/kWh, at an overall efficiency of 9.87%, for an operational life of 20 years.

show abstract

Fuel Management

2008

Fuel Cells

View full text Add to dashboard Cite

Prediction of production power for high-pressure hydrogen by high-pressure water electrolysis

Cited by 182 publications

References 3 publications

Hydrogen and oxygen generation with polymer electrolyte membrane (PEM)-based electrolytic technology

Hydrogen and oxygen generation with polymer electrolyte membrane (PEM)-based electrolytic technology

Optimum Alkaline Electrolyzer-Proton Exchange Membrane Fuel Cell Coupling in a Residential Solar Stand-Alone Power System

Fuel Management

Contact Info

Product

Resources

About