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Thermodynamic Analysis of a Hybrid Power System Combining Kalina Cycle with Liquid Air Energy Storage
- Source :
- Entropy, Volume 21, Issue 3, Entropy, Vol 21, Iss 3, p 220 (2019)
- Publication Year :
- 2019
- Publisher :
- MDPI, 2019.
-
Abstract
- Liquid air energy storage (LAES) is a promising energy storage technology in consuming renewable energy and electricity grid management. In the baseline LAES (B-LAES), the compression heat is only utilized in heating the inlet air of turbines, and a large amount of compression heat is surplus, leading to a low round-trip efficiency (RTE). In this paper, an integrated energy system based on LAES and the Kalina cycle (KC), called KC-LAES, is proposed and analyzed. In the proposed system, the surplus compression heat is utilized to drive a KC system to generate additional electricity in the discharging process. An energetic model is developed to evaluate the performance of the KC and the KC-LAES. In the analysis of the KC subsystem, the calculation results show that the evaporating temperature has less influence on the performance of the KC-LAES system than the B-LAES system, and the optimal working fluid concentration and operating pressure are 85% and 12 MPa, respectively. For the KC-LAES, the calculation results indicate that the introduction of the KC notably improves the compression heat utilization ratio of the LAES, thereby improving the RTE. With a liquefaction pressure value of eight MPa and an expansion pressure value of four MPa, the RTE of the KC-LAES is 57.18%, while that of the B-LAES is 52.16%.
- Subjects :
- 020209 energy
General Physics and Astronomy
lcsh:Astrophysics
Cryogenic energy storage
02 engineering and technology
Energy storage
Article
020401 chemical engineering
Heat recovery ventilation
lcsh:QB460-466
0202 electrical engineering, electronic engineering, information engineering
0204 chemical engineering
lcsh:Science
Process engineering
liquid air energy storage
Kalina cycle
business.industry
Liquefaction
lcsh:QC1-999
thermodynamic analysis
Renewable energy
heat recovery
Working fluid
Environmental science
lcsh:Q
Hybrid power
business
lcsh:Physics
Subjects
Details
- Language :
- English
- ISSN :
- 10994300
- Volume :
- 21
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Entropy
- Accession number :
- edsair.doi.dedup.....cc3495b244096cada2da8d3d46902747