Performance assessment of Adiabatic Compressed Air Energy Storage (A-CAES) power plants integrated with packed-bed thermocline storage systems

Tola, Vittorio; Meloni, Valentina; Spadaccini, Fabrizio; Cau, Giorgio

doi:10.1016/j.enconman.2017.08.051

Cited by 76 publications

(18 citation statements)

References 39 publications

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“…D-CAES systems use natural gas to heat the compressed air in the decompression period. However, Adiabatic CAES (A-CAES) allows the storage of the thermal energy during the air compression period, avoiding the consumption of natural gas, therefore increasing the round trip energy efficiency up to 70-75% [15][16][17]. During the operation of A-CAES plants, the air is stored in the underground reservoir at high pressures during the charge period.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of Compressed Air Energy Storage (CAES) Reservoirs in Abandoned Mines Using Different Sealing Layers

Prado

Menéndez²,

Sánchez

et al. 2021

Applied Sciences

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Million cubic meters from abandoned mines worldwide could be used as subsurface reservoirs for large scale energy storage systems, such as adiabatic compressed air energy storage (A-CAES). In this paper, analytical and three-dimensional CFD numerical models have been conducted to analyze the thermodynamic performance of the A-CAES reservoirs in abandoned mines during air charging and discharging processes. Unlike other research works, in which the heat transfer coefficient is considered constant during the operation time, in the present investigation a correlation based on both unsteady Reynolds and Rayleigh numbers is employed for the heat transfer coefficient in this type of application. A tunnel with a 35 cm thick concrete lining, 200 m3 of useful volume and typical operating pressures from 5 to 8 MPa were considered. Fiber-reinforced plastic (FRP) and steel were employed as sealing layers in the simulations around the fluid. Finally, the model also considers a 2.5 m thick sandstone rock mass around the concrete lining. The results obtained show significant heat flux between the pressurized air and the sealing layer and between the sealing layer and concrete lining. However, no temperature fluctuation was observed in the rock mass. The air temperature fluctuations are reduced when steel sealing layer is employed. The thermal energy balance through the sealing layer for 30 cycles, considering air mass flow rates of 0.22 kg s−1 (charge) and −0.45 kg s−1 (discharge), reached 1056 and 907 kWh for FRP and steel, respectively. In general, good agreements between analytical and numerical simulations were obtained.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of Compressed Air Energy Storage (CAES) Reservoirs in Abandoned Mines Using Different Sealing Layers

Prado

Menéndez²,

Sánchez

et al. 2021

Applied Sciences

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“…Because the conventional CAES systems have to use fuel to heat compressed air, an optimized CAES system named Adiabatic CAES (A‐CAES) has been proposed, in which thermal energy storage (TES) technology is introduced into the system. Thus the heat generated during the charge process can be stored and then utilized to preheat the air during the discharge process 7 . Subsequently, the concept of Advanced Adiabatic CAES (AA‐CAES) has been proposed, and the storage temperature in TES is above 600°C, which can increase the output power during the discharge process 8 …”

Section: Introductionmentioning

confidence: 99%

“…Thus the heat generated during the charge process can be stored and then utilized to preheat the air during the discharge process. 7 Subsequently, the concept of Advanced Adiabatic CAES (AA-CAES) has been proposed, and the storage temperature in TES is above 600 C, which can increase the output power during the discharge process. 8 To obtain CAES systems with better performance, scholars have made further research on system optimization of CAES systems.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of a novel compressed carbon dioxide energy storage system with low‐temperature thermal storage

et al. 2020

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Summary Research projects on new electrical energy storage (EES) systems are underway because of the role of EES in balancing the electric grid and smoothing out the instability of renewable energy. In this paper, a novel compressed carbon dioxide energy storage with low‐temperature thermal storage was proposed. Liquid CO2 storage was employed to increase the storage density of the system and avoid its dependence on geological formations. Low‐temperature thermal energy storage technology was utilized to recycle the heat of compression and reduce the challenges to system components. The system configuration was introduced in detail. Four evaluation criteria, the round trip efficiency (RTE), exergy efficiency (ηEx), thermal efficiency (ηTE), and energy density (ρE) were defined to show the system performance. Parametric analysis was carried out to examine the effects of some key parameters on system performance and the genetic algorithm was adopted for system optimization. The calculated results show that, for the novel EES under the basic working condition, its RTE is 41.4%, ηTE is 59.7%, ηEx is 45.4%, and ρE is 15 kWh m−3. The value of ρE increases with the increasing pump outlet pressure for a fixed value of pressure ratio, and the changes of RTE, ηTE, and the total exergy destruction of the system (ED,total) with pump outlet pressure are complicated for different values of pressure ratio. When both pressure ratio and pump outlet pressure are high, the values of RTE and ρE can be maximized whereas the value of ED,total can be minimized. Besides, no matter how pump outlet pressure and pressure ratio change, the exergy destruction of the system mainly come from compressors and regenerators, which accounts for about 50% of the total exergy destruction.

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“…Tola et al present a performance assessment of adiabatic CAES power plant integrated with a packed bed thermocline storage system 31 . The round trip efficiencies of the power plant (i) with air throttling upstream of the turbine and (ii) without air throttling were, respectively, 71.5% to 75.6% and 73% to 77%, depending closely on the number of cycles.…”

Section: Introductionmentioning

confidence: 99%

Comparison of constant volume energy storage systems based on compressed air

2020

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Summary Growing installed capacity in renewable energy sources is driving demand for energy storage in the power systems. Compressed air energy storage (CAES) technology can provide a good alternative to pumped energy storage, with high reliability and good efficiency in terms of performance. The article presents three constant volume CAES systems: (i) without recuperation, (ii) with recuperation, and (iii) adiabatic. Dynamic mathematical models of these systems were built using Aspen HYSYS software. Adiabatic compressed air energy storage system with liquid thermal energy storage achieved round trip efficiency of 64.8%.

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Performance assessment of Adiabatic Compressed Air Energy Storage (A-CAES) power plants integrated with packed-bed thermocline storage systems

Cited by 76 publications

References 39 publications

Thermodynamic Analysis of Compressed Air Energy Storage (CAES) Reservoirs in Abandoned Mines Using Different Sealing Layers

Thermodynamic Analysis of Compressed Air Energy Storage (CAES) Reservoirs in Abandoned Mines Using Different Sealing Layers

Thermodynamic analysis of a novel compressed carbon dioxide energy storage system with low‐temperature thermal storage

Comparison of constant volume energy storage systems based on compressed air

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