Energy and exergy analysis of adiabatic compressed air energy storage system

Szabłowski, Łukasz; Krawczyk, Piotr; Badyda, Krzysztof; Karellas, Sotiriοs; Kakaras, Emmanuel; Bujalski, Wojciech

doi:10.1016/j.energy.2017.07.055

Cited by 112 publications

(39 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overall, the energy analysis and exergy analysis of UWCAES system guide significantly different directions for optimization. Similar conclusions are also found in other studies . This is because the energy analysis is based on the first law of thermodynamics while the exergy analysis is based on the second law.…”

Section: Energy and Exergy Analysessupporting

confidence: 90%

“…The local loss coefficients are calculated by following equations. [34][35][36][37][38][39][40][41][42][43][44][45][46][47]…”

Section: Pressure Lossmentioning

confidence: 99%

“…Similar conclusions are also found in other studies. [41][42][43] This is because the energy analysis is based on the first law of thermodynamics while the exergy analysis is based on the second law. In energy analysis, only the quantity of energy is considered while both quantity and quality of energy are considered in exergy analysis.…”

Section: Exergy Analysismentioning

confidence: 99%

See 2 more Smart Citations

Energy, exergy, and sensitivity analyses of underwater compressed air energy storage in an island energy system

et al. 2019

View full text Add to dashboard Cite

Summary An underwater compressed air energy storage (UWCAES) system is integrated into an island energy system. Both energy and exergy analyses are conducted to scrutinize the performance of the UWCAES system. The analyses reveal that a round‐trip efficiency of 58.9% can be achieved. However, these two analyses identify different directions for further improvement. The heat exchangers, expanders, compressors, electric motors, and generators account for the most exergy destruction. A sensitivity analysis is also conducted to investigate the importance of different input parameters on the round‐trip exergy efficiency of the UWCAES system. The results of both local and global analyses show that the round‐trip exergy efficiency is most sensitive to the isentropic efficiency of the expanders and compressors, and the efficiencies of the electric motors and generators. The impacts of the heat exchangers, the self‐discharge rate of the air accumulator, the inner diameter of the pneumatic pipelines, and the insulation thickness of the hot‐oil tank on the round‐trip exergy efficiency are shown to be highly nonlinear.

show abstract

Section: Energy and Exergy Analysessupporting

confidence: 90%

“…The local loss coefficients are calculated by following equations. [34][35][36][37][38][39][40][41][42][43][44][45][46][47]…”

Section: Pressure Lossmentioning

confidence: 99%

See 1 more Smart Citation

Energy, exergy, and sensitivity analyses of underwater compressed air energy storage in an island energy system

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Thus, no fossil fuel combustion is required. Several studies and techno-economic assessments on adiabatic CAES are available in the literature, in combination with renewable energy systems or connected to the power grid [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. They promise efficiencies up to 65-70%, but no plants of this type exist so far, mainly for the high investment costs, the complexity of the system, and the technological barriers to moderately high temperature heat storage.…”

Section: Mechanical Storage Systemsmentioning

confidence: 99%

“…In the adiabatic CAES [28,36] the compressed thermal energy is retained in thermal storage, and then utilized to heat the compressed air before entering the turbine. Thus, no fossil fuel combustion is required.…”

Section: Mechanical Storage Systemsmentioning

confidence: 99%

Hybrid Hydrogen and Mechanical Distributed Energy Storage

2017

View full text Add to dashboard Cite

Effective energy storage technologies represent one of the key elements to solving the growing challenges of electrical energy supply of the 21st century. Several energy storage systems are available, from ones that are technologically mature to others still at a research stage. Each technology has its inherent limitations that make its use economically or practically feasible only for specific applications. The present paper aims at integrating hydrogen generation into compressed air energy storage systems to avoid natural gas combustion or thermal energy storage. A proper design of such a hybrid storage system could provide high roundtrip efficiencies together with enhanced flexibility thanks to the possibility of providing additional energy outputs (heat, cooling, and hydrogen as a fuel), in a distributed energy storage framework. Such a system could be directly connected to the power grid at the distribution level to reduce power and energy intermittence problems related to renewable energy generation. Similarly, it could be located close to the user (e.g., office buildings, commercial centers, industrial plants, hospitals, etc.). Finally, it could be integrated in decentralized energy generation systems to reduce the peak electricity demand charges and energy costs, to increase power generation efficiency, to enhance the security of electrical energy supply, and to facilitate the market penetration of small renewable energy systems. Different configurations have been investigated (simple hybrid storage system, regenerate system, multistage system) demonstrating the compressed air and hydrogen storage systems effectiveness in improving energy source flexibility and efficiency, and possibly in reducing the costs of energy supply. Round-trip efficiency up to 65% can be easily reached. The analysis is conducted through a mixed theoretical-numerical approach, which allows the definition of the most relevant physical parameters affecting the system performance.

show abstract

Thermodynamic analysis of a novel fossil‐fuel–free energy storage system with a trans‐critical carbon dioxide cycle and heat pump

Hao

Liu

et al. 2020

Int J Energy Res

View full text Add to dashboard Cite

This paper presents and analyzes a novel fossil-fuel-free trans-critical energy storage system that uses CO2 as the working fluid in a closed loop shuttled between two saline aquifers or caverns at different depths, one a low-pressure reservoir, and the other a high-pressure reservoir. Thermal energy storage and a heat pump are adopted to eliminate the need for external natural gas for heating the CO2 entering the energy recovery turbines. We carefully analyze the energy storage and recovery processes to reveal the actual efficiency of the system. We also highlight thermodynamic and sensitivity analyses of the performance of this fossil-fuel-free trans-critical energy storage system based on a steady-state mathematical method. It is found that the fossilfuel-free trans-critical CO2 energy storage system has good comprehensive thermodynamic performance. The exergy efficiency, round-trip efficiency, and energy storage efficiency are 67.89%, 66% and 58.41%, and the energy generated of per unit storage volume is 2.12 kW⋅h/m 3 , and the main contribution to exergy destruction is the turbine re-heater, from which we can quantify how performance can be improved. Moreover, with a relatively higher energy storage and recovery pressure and lower pressure in the low-pressure reservoir, this novel system shows promising performance.

show abstract

Energy and exergy analysis of adiabatic compressed air energy storage system

Cited by 112 publications

References 22 publications

Energy, exergy, and sensitivity analyses of underwater compressed air energy storage in an island energy system

Energy, exergy, and sensitivity analyses of underwater compressed air energy storage in an island energy system

Hybrid Hydrogen and Mechanical Distributed Energy Storage

Thermodynamic analysis of a novel fossil‐fuel–free energy storage system with a trans‐critical carbon dioxide cycle and heat pump

Contact Info

Product

Resources

About