Performance of an Isobaric Hybrid Compressed Air Energy Storage System at Minimum Entropy Generation
| Autor: | Pirouz Kavehpour, Mohammad Janbozorgi, Sammy Houssainy |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Exergy
0303 health sciences Compressed air energy storage Renewable Energy Sustainability and the Environment 020209 energy Mechanical Engineering Compressed air Energy Engineering and Power Technology Thermodynamics 02 engineering and technology Energy storage 03 medical and health sciences Fuel Technology Geochemistry and Petrology 0202 electrical engineering electronic engineering information engineering Isobaric process Environmental science 030304 developmental biology Efficient energy use Minimum entropy |
| Zdroj: | Journal of Energy Resources Technology. 142 |
| ISSN: | 1528-8994 0195-0738 |
| DOI: | 10.1115/1.4045931 |
| Popis: | Efficient, large-scale, and cost-effective energy storage systems provide a means of managing the inherent intermittency of renewable energy sources and drastically increasing their utilization. Compressed air energy storage (CAES) and its derivative architectures have received much attention as a viable solution; however, optimization objectives for these systems have not been thoroughly investigated in the literature. A hybrid thermal and compressed air energy storage (HT-CAES) system is investigated that mitigates the shortcomings of the otherwise attractive conventional CAES systems and its derivatives—shortcomings such as strict geological locations, low energy densities, and the production of greenhouse gas emissions. The HT-CAES system allows a portion of the available energy to operate a compressor and the remainder to be converted and stored in the form of heat through joule/resistive heating in a high-temperature, sensible, thermal energy storage medium. Internally reversible and irreversible HT-CAES system assumptions were investigated, in addition to regenerative and non-regenerative design configurations. Several system optimization criteria were examined—including maximum energy efficiency, maximum exergy efficiency, maximum work output, and minimum entropy generation—with a focus on whether the latter may lead to conclusive design guidelines in a real system. It is shown that an HT-CAES system designed based on a minimum entropy generation objective may operate at a lower energy and exergy efficiency as well as lower output power than otherwise achievable. Furthermore, optimization objective equivalence is shown to be limited to certain design conditions. |
| Databáze: | OpenAIRE |
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