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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
