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Increasing Compressed Gas Energy Storage Density Using CO2–N2 Gas Mixture
- Source :
- Energies, Volume 13, Issue 10, Energies, Vol 13, Iss 2431, p 2431 (2020)
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- This paper demonstrates a new method by which the energy storage density of compressed air systems is increased by 56.8% by changing the composition of the compressed gas to include a condensable component. A higher storage density of 7.33 MJ/m3 is possible using a mixture of 88% CO2 and 12% N2 compared to 4.67 MJ/m3 using pure N2. This ratio of gases representing an optimum mixture was determined through computer simulations that considered a variety of different proportions from pure CO2 to pure N2. The computer simulations are based on a thermodynamic equilibrium model that predicts the mixture composition as a function of volume and pressure under progressive compression to ultimately identify the optimal mixture composition (88% CO2 + 12% N2). The model and simulations predict that the optimal gas mixture attains a higher energy storage density than using either of the pure gases.
- Subjects :
- Control and Optimization
Materials science
020209 energy
Compressed air
Energy Engineering and Power Technology
Thermodynamics
02 engineering and technology
lcsh:Technology
Thermodynamic equilibrium model
Energy storage
compressed air storage
binary mixture
pumped storage
0202 electrical engineering, electronic engineering, information engineering
Electrical and Electronic Engineering
Engineering (miscellaneous)
lcsh:T
Renewable Energy, Sustainability and the Environment
Component (thermodynamics)
GLIDES
Compressed natural gas
021001 nanoscience & nanotechnology
Compression (physics)
Volume (thermodynamics)
vapor liquid equilibrium
Vapor–liquid equilibrium
0210 nano-technology
Energy (miscellaneous)
Subjects
Details
- ISSN :
- 19961073
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- Energies
- Accession number :
- edsair.doi.dedup.....b801955054ca2cc037ef460f0d388006