Off-design behavior investigation of hydrogen blending-fueled compressed air energy storage system

Ning Ma, Pan Zhao, Aijie Liu, Wenpan Xu and Jiangfeng Wang

Energy, 2024, vol. 306, issue C

Abstract: Nowadays, the integration of compressed air energy storage with hydrogen energy is seen as a promising approach to reduce carbon emissions and enhance commercial feasibility. This paper aims to uncover energy conversion mechanisms, comprehend the irreversible loss in components to enhance system performance in the compressed air energy storage system using hydrogen-blended natural gas as fuel. The detailed thermodynamic analysis for the proposed system under off-design condition, considering scenarios with constant and variable turbine inlet pressure modes, is conducted. The research results indicate that adopting a variable turbine inlet pressure mode and increasing the hydrogen blending ratio are beneficial for enhancing system performance. The most superior system can achieve a roundtrip efficiency of 62.28 %, an exergy efficiency of 61.39 %, and an energy density of 7.77 kWh/m3. Increasing the hydrogen blending ratio alleviates the decrease in isentropic efficiency of the turbine, thereby maintaining a higher output power level. The influence of increasing the hydrogen blending ratio on CO2 emissions is significant across various load rates, surpassing the impact of corrected speeds. Additionally, hydrogen blending demonstrates a remarkable enhancement in system performance under high load and corrected speed conditions, particularly in exergy efficiency, with precise percentage increases of ∼1.42 % and ∼1.49 %, respectively.

Keywords: Compressed air energy storage; Hydrogen blending-fueled; Off-design performance; Energy analysis; Exergy analysis (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:306:y:2024:i:c:s0360544224022977

DOI: 10.1016/j.energy.2024.132523

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