Performance evaluation of a combined heat and compressed air energy storage system integrated with ORC for scaling up storage capacity purpose

Wang, Peizi; Zhao, Pan; Dai, Yiping

doi:10.1016/j.energy.2019.116405

Cited by 29 publications

(5 citation statements)

References 28 publications

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“…Refs. [53,57] are selected to validate the mathematical models of the CAES system and the ORC unit. The calculated values of the CAES system and data in ref.…”

Section: Model Validationmentioning

confidence: 99%

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Design and Thermodynamic Investigation of a Waste Heat‐Assisted Compressed Air Energy Storage System Integrating Thermal Energy Storage and Organic Rankine Cycle

Fu,

Sun,

Huo

2023

Energy Tech

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Compressed air energy storage (CAES) technology has attracted growing attention because of the demand for load shifting and electricity cost reduction in energy‐intensive industries. To increase the round‐trip efficiency and energy storage density and simplify the structure of advanced adiabatic CAES (AA‐CAES) systems, a waste heat‐assisted CAES (WH‐CAES) design integrating a tube‐in‐tube thermal energy storage unit and an organic Rankine cycle (ORC) is described herein. Thermodynamic models of the proposed WH‐CAES system are established, and the effects of waste heat temperature, ratio of compression ratios, ratio of expansion ratios, and air storage cavern pressure on the performance of different systems, including AA‐CAES and WH‐CAES with and without ORC, are investigated. The results show that when the waste heat temperature is 500 °C, the input work of the compressors reaches its minimum value at a ratio of compression ratios of 1.14, and the optimal ratio of expansion ratios is 0.39. Under these optimal operating conditions, compared with the AA‐CAES system, the round‐trip storage efficiency, energy storage density, and system energy efficiency of the WH‐CAES system can be increased significantly. The findings validate the potential of the proposed WH‐CAES system.

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“…Refs. [53,57] are selected to validate the mathematical models of the CAES system and the ORC unit. The calculated values of the CAES system and data in ref.…”

Section: Model Validationmentioning

confidence: 99%

“…The calculated values of the ORC unit and data in ref. [57] are compared in Table 3 , with an absolute relative error of 0.16%. Hence, it can be concluded that the models are acceptable.…”

Section: Mathematical Modelsmentioning

confidence: 99%

Design and Thermodynamic Investigation of a Waste Heat‐Assisted Compressed Air Energy Storage System Integrating Thermal Energy Storage and Organic Rankine Cycle

Fu,

Sun,

Huo

2023

Energy Tech

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“…Combined heat and CAES attached with organic Rankine cycle system was modeled, analyzed, and discussed in detail by Wang al. [31].…”

Section: Abstract-this Paper Presents An Economical and Experimental Study Of Large And Small Scales Compressed Air Energy Storage (Caes)mentioning

confidence: 99%

Economical and Experimental Study of Hybrid Power System of Compressed Air Energy Storage with Photovoltaic Array and Wind Turbine Generator. (Dept. E)

Gouda

Abd-Alaziz

El‐Saadawi

2021

MEJ. Mansoura Engineering Journal

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“…Some assumptions about the system model are as follows 22,28,29,31,44 : The system operates under a steady‐state condition. The leakage of working fluids (ie, CO 2 and water) in the system is negligible. The heat transfer between system components (ie, regenerators, heat exchangers, and TES) and the environment is neglected. Pressure drop and heat dissipation of working fluids in pipes are not taken into account. Pressure change and power consumption in S and LSTs are neglected. Energy conversion efficiencies in motor and generator are neglected. The processes of streams flowing through LSTs are assumed as isothermal and isobaric, and the state changes of CO 2 in LSTs during the charge process and the discharge process are not taken into account. The cooling water tank (CWT) can dissipate heat to the environment, thus the temperature in CWT could be kept constant (ie, 293.15 K). …”

Section: Thermodynamic Model Of This Novel Systemmentioning

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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Performance evaluation of a combined heat and compressed air energy storage system integrated with ORC for scaling up storage capacity purpose

Cited by 29 publications

References 28 publications

Design and Thermodynamic Investigation of a Waste Heat‐Assisted Compressed Air Energy Storage System Integrating Thermal Energy Storage and Organic Rankine Cycle

Design and Thermodynamic Investigation of a Waste Heat‐Assisted Compressed Air Energy Storage System Integrating Thermal Energy Storage and Organic Rankine Cycle

Economical and Experimental Study of Hybrid Power System of Compressed Air Energy Storage with Photovoltaic Array and Wind Turbine Generator. (Dept. E)

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

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