Experimental and Numerical Analysis of the Impeller Backside Cavity in a Centrifugal Compressor for CAES

Lin, Zhihua; Zuo, Zhigang; Li, Wei; Sun, Jianting; Zhou, Xin; Chen, Haisheng; Zhou, Xuezhi

doi:10.3390/en15020420

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…These technologies store energy until it is needed [109]. Various energy systems are available such as supercapacitors [110,111], batteries [112,113], flywheel [114,115], compressed air [116,117], thermal energy storage [118,119], pumped hydro [120], and others. Table 6 shows a comparison between the different storage systems, and Table 7 shows the largest energy storage systems installed around the globe.…”

Section: Energy Managementmentioning

confidence: 99%

Renewable Energy and Energy Storage Systems

et al. 2023

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The use of fossil fuels has contributed to climate change and global warming, which has led to a growing need for renewable and ecologically friendly alternatives to these. It is accepted that renewable energy sources are the ideal option to substitute fossil fuels in the near future. Significant progress has been made to produce renewable energy sources with acceptable prices at a commercial scale, such as solar, wind, and biomass energies. This success has been due to technological advances that can use renewable energy sources effectively at lower prices. More work is needed to maximize the capacity of renewable energy sources with a focus on their dispatchability, where the function of storage is considered crucial. Furthermore, hybrid renewable energy systems are needed with good energy management to balance the various renewable energy sources’ production/consumption/storage. This work covers the progress done in the main renewable energy sources at a commercial scale, including solar, wind, biomass, and hybrid renewable energy sources. Moreover, energy management between the various renewable energy sources and storage systems is discussed. Finally, this work discusses the recent progress in green hydrogen production and fuel cells that could pave the way for commercial usage of renewable energy in a wide range of applications.

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Section: Energy Managementmentioning

confidence: 99%

Renewable Energy and Energy Storage Systems

et al. 2023

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“…After one year, he investigated the effect of rotational speed and variable angles on the aerodynamic performance of centrifugal compressors [15]. Then, he investigated the static temperature and static pressure of the impeller backside cavity in a centrifugal compressor [16]. The results indicated that the impeller backside cavity has an important effect on the efficiency, shaft power, and pressure ratio of the centrifugal compressor.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Performance of Compressors for Small-Scale Compressed Air Energy Storage in Parallel Mode

Yang,

Xu,

Zhang

et al. 2023

Sustainability

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The Compressed Air Energy Storage (CAES) system is a promising energy storage technology that has the advantages of low investment cost, high safety, long life, and is clean and non-polluting. The compressor/expander is the core equipment of the CAES system, and its performance has a decisive impact on the overall system efficiency and economic performance. Based on the pneumatic motor, this study proposes and designs a test bench of the CAES system that integrates compression and expansion functions. The off-design operation condition represented by the pressure change in the air tank has an important influence on the efficiency and economy of the CAES system. The effect of key parameters such as air tank pressure, torque, and mass flow rate on the output and efficiency of the compressor is investigated. When the CAES system is operating in energy storage mode, the compressor must continuously deliver gas to the gas storage. The working pressure of the compressor increases with the pressure in the air tank, so the compressor used for energy storage must operate continuously over a wide range of working conditions. The parallel operation mode of the compressor is proposed to improve the working condition range of the compressor torque and current, and improve the isotropic efficiency. When the air receiver pressure is 2.6 bar and the rotational speed is 2850 r/min, the power consumption of the compressor reaches the maximum value of approximately 1233.1 W. This new parallel mode could provide a CAES unit a systematic solution.

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“…The CAES system is considered one of the energy storage technologies with the most development potential. The compressor is one of the most important components of the compressed air energy storage system, and its performance directly determines the efficiency and economy of the energy storage system [4,5]. The radial inlet chamber (RIC) is one of the important static components in the compressor unit.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Radial Inlet Chamber Splitter Blades on the Oblique Flow Compressor Performance

et al. 2023

Self Cite

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The oblique flow compressor is one of the important components in the compressed air energy storage (CAES) system. The structural shape of the radial inlet chamber (RIC) directly affects the compressor performance, and a reasonable RIC design should achieve the smallest total pressure loss and outlet distortion as much as possible to meet the structural design. To study the influence of splitter blades, 4 RICs equipped with different numbers of splitter blades are designed, and the performance of 4 RICs and the overall performance of the compressor is calculated. The results show that with the increase in the number of splitter blades, the stall margin increases from 6.3% to 13.94%. At the design point, the isentropic efficiency is highest for the RIC with 17 splitter blades, and the pressure ratio is highest for the RIC with 11 splitter blades. Compared with the direct axial intake mode, the uniformity of the relative leakage distribution and the attack angle distribution of the impeller leading edge under 4 radial intake modes are poor. However, with an increase in the number of splitter blades, the uniformity of the relative tip leakage and the attack angle distribution gradually increase. The flow loss of RIC will increase simultaneously, though the uniformity of the outlet aerodynamic parameters distribution improves, and the influence on the downstream component performance gradually weakens. There is an optimal number of splitter blades in RIC, which balances the total pressure loss and distortion coefficient.

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Experimental and Numerical Analysis of the Impeller Backside Cavity in a Centrifugal Compressor for CAES

Cited by 5 publications

References 25 publications

Renewable Energy and Energy Storage Systems

Renewable Energy and Energy Storage Systems

Experimental Investigation on the Performance of Compressors for Small-Scale Compressed Air Energy Storage in Parallel Mode

Study on the Influence of Radial Inlet Chamber Splitter Blades on the Oblique Flow Compressor Performance

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