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Comparative performance analysis of solar powered supercritical-transcritical CO2 based systems for hydrogen production and multigeneration.

Comparative performance analysis of solar powered supercritical-transcritical CO2 based systems for hydrogen production and multigeneration.

Authors :
Bamisile, Olusola
Mukhtar, Mustapha
Yimen, Nasser
Huang, Qi
Olotu, Olamide
Adebayo, Victor
Dagabsi, Mustafa
Source :
International Journal of Hydrogen Energy. Jul2021, Vol. 46 Issue 52, p26272-26288. 17p.
Publication Year :
2021

Abstract

CO 2 based power and refrigeration cycles have been developed and analyzed in different existing studies. However, the development of a CO 2 based comprehensive energy system and its performance analysis have not been considered. In this study, the integration of a CO 2 based solar parabolic trough collector system, a supercritical CO 2 power cycle, a transcritical CO 2 power cycle, and a CO 2 based cascade refrigeration system for hydrogen production and multigeneration purpose is analyzed thermodynamically. This study aims to analyze and compare the difference in the thermodynamic performance of comprehensive energy systems when CO 2 is used as the working fluid in all the cycles with a system that uses other working fluids. Therefore, two comprehensive energy systems with the same number of subsystems are designed to justify the comparison. The second comprehensive energy system uses liquid potassium instead of CO 2 as a working fluid in the solar parabolic trough collector and a steam cycle is used to replace the transcritical CO 2 power cycle. Results of the energy and exergy performance analysis of two comprehensive energy systems showed that the two systems can be used for the multigeneration purpose. However, the use of a steam cycle and potassium-based solar parabolic trough collector increases the comprehensive energy systems' overall energy and exergy efficiency by 41.9% and 26.7% respectively. Also, the use of liquid potassium as working fluid in the parabolic trough collectors increases the absorbed solar energy input by 419 kW and 2100 kW thereby resulting in a 23% and 90.7% increase in energetic and exergetic efficiency respectively. The carbon emission reduction potential of the two comprehensive energy systems modelled in this study is also analyzed. [Display omitted] • Thermodynamic study of a CO 2 based solar-powered comprehensive energy system. • Comparison of the CO 2 based systems' performance with another multigeneration system. • The CO 2 -based energy systems' overall energy and exergy efficiencies are 0.298 and 0.19 respectively. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03603199
Volume :
46
Issue :
52
Database :
Academic Search Index
Journal :
International Journal of Hydrogen Energy
Publication Type :
Academic Journal
Accession number :
151429853
Full Text :
https://doi.org/10.1016/j.ijhydene.2021.05.122