Abstract

This paper aims to analyze the energy efficiency of water electrolysis under high pressure and high temperature conditions. The effects of temperature and pressure on four different kinds of reaction mechanisms, namely, reversible voltage, activation polarization, ohmic polarization, and concentration polarization, are investigated in details. Results show that the ohmic and concentration over-potentials are increased as temperature is increased, however, the reversible and activation over-potentials are decreased as temperature is increased. Therefore, the net efficiency is enhanced as temperature is increased. The efficiency of water electrolysis at 350°C/100 bars is increased about 17%, compared with that at 80°C/1bar.

Details

Title
The analysis of energy efficiency in water electrolysis under high temperature and high pressure
Author
Hourng, L W 1 ; Tsai, T T 1 ; Lin, M Y 2 

1  Department of Mechanical Engineering, National Central University, Taoyuan, Taiwan 
2  Department of Mechanical Engineering, Army Academy, Taoyuan, Taiwan 
Publication year
2017
Publication date
Nov 2017
Publisher
IOP Publishing
ISSN
17551307
e-ISSN
17551315
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1088/1755-1315/93/1/012035
ProQuest document ID
2548661010
Copyright
© 2017. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.