Research on recovery and utilization of waste heat in advanced compressed air energy storage system

Wen, Xiaoqing; Yang, Dahui; Zhong, Jingliang; Feng, Tao; Li, Xiang

doi:10.1016/j.egyr.2022.02.082

Cited by 15 publications

(3 citation statements)

References 9 publications

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“…In this paper, considering the characteristics of high altitude in regional microgrids and the influence of air pressure, temperature, and other factors, according to the parameter settings proposed in [14] and [15], the parameters of the simulation analysis model of DCAES under wide working conditions proposed in this paper are designed. The system parameters are shown in Table 1 and Table 2.…”

Section: Simulation Parametersmentioning

confidence: 99%

Simulation Model and Performance Analysis for Distributed Compressed Air Energy Storage under Off-design Conditions

Zhu

et al. 2023

J. Phys.: Conf. Ser.

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The dual carbon target in China, which is set to improve the low carbon and economy of regional microgrid (villages in northwest China for example) energy consumption, is proposed to use compressed air energy storage to improve the utilization rate of distributed new energy and reduce the cost of power purchase to the upper power grid. Therefore, the system dynamic characteristics simulation and performance analysis under wide working conditions are very important for improving the utilization rate of new energy. Firstly, the operation characteristics of the compression subsystem and turbine subsystem under wide working conditions are analyzed. Secondly, the mathematical models of the compression subsystem, turbine subsystem, throttle valve, and air storage chamber in the distributed compressed air energy storage system are established. Finally, the dynamic characteristics of energy storage and energy release under different working conditions of the system are studied through simulation. The simulation results show that under the condition of the high mass flow rate, the pressure of the air storage chamber can be increased by 8.29 MPa, and the temperature can be increased by 82 °C. The research results provide a theoretical basis for the system design of distributed compressed air energy storage.

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Section: Simulation Parametersmentioning

confidence: 99%

Simulation Model and Performance Analysis for Distributed Compressed Air Energy Storage under Off-design Conditions

Zhu

et al. 2023

J. Phys.: Conf. Ser.

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“…[ 26 ] Safaei et al [ 42 ] distributed the compressors in the CAES system near the heat load in order to recover the compression heat for low‐level heating needs; the economics of this model depends on the fuel price and the length of the air pipe. Wen et al [ 43 ] found that after adding an expander with low expansion ratio to recover waste heat from AA‐CAES system and waste heat from heat exchange process, the system efficiency can be increased by 7.34% compared with that without WHR. Chen et al [ 44 ] proposed a new CAES system that combines a precooler and free waste heat below 200 °C as a heat source, which can significantly improve the performance of traditional CAES systems.…”

Section: Introductionmentioning

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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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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“…Wen et al 13 proposed a technique for recycling the exhaust gas and waste heat of the heat exchange working medium. A four-stage advanced CAES model simulation under steady-state operation circumstances was carried.…”

Section: Introductionmentioning

confidence: 99%

Cooling potential for hot climates by utilizing thermal management of compressed air energy storage systems

Alami

Orhan

Rashid

et al. 2022

Sci Rep

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This work presents findings on utilizing the expansion stage of compressed air energy storage systems for air conditioning purposes. The proposed setup is an ancillary installation to an existing compressed air energy storage setup and is used to produce chilled water at temperatures as low as 5 °C. An experimental setup for the ancillary system has been built with appropriate telemetric devices to measure the temporal temperature variation, which consequently can be used to calculate the heat transfer and available cooling capacity. The system is compared to commercially available compression cooling air conditioners, and the potential of replacing them is promising, as one ton of conventional cooling can be replaced with a 500-L (0.5 m3) air tank at 20 bar operating for an hour. More tanks can be added to extend the operational viability of the system, which is also serving the original purpose of storing energy from grid excess or from solar photovoltaic panels. The thermal management has had the added benefit of increasing the roundtrip efficiency of the storage system from 31.4 to 35.2%, along with handling a portion of the cooling load.

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Research on recovery and utilization of waste heat in advanced compressed air energy storage system

Cited by 15 publications

References 9 publications

Simulation Model and Performance Analysis for Distributed Compressed Air Energy Storage under Off-design Conditions

Simulation Model and Performance Analysis for Distributed Compressed Air Energy Storage under Off-design Conditions

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

Cooling potential for hot climates by utilizing thermal management of compressed air energy storage systems

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