Thermodynamic and economic analysis of a novel gravity‐enhanced compressed air energy storage system
نویسندگان
چکیده
In this paper, a novel energy storage technology of gravity-enhanced compressed air system is proposed for the first time, aiming to support rapid growth solar and wind capacity. With formed by shaft well, gravity piston, seal membrane, could achieve constant operating pressure, high efficiency, large Electricity charged into simultaneously transformed stored in thermal, pressure potential, gravitational potential forms. The properties are simulated analyzed with commercial software Thermoflex V29. Results show that both well radius have essential influences on performance newly system. theoretical efficiency scope 63.58%–65.50% range 40–100 bar. Economic analysis based time-of-use price policy China suggests optimum levelized cost (LCOS) happens at 70 bar 8 m. Besides, considering different plant factors reflect total investment power plant, LCOS 1.09–1.26 CNY/kWh. Moreover, specific exergy discharged electricity assessed be 0.51 CNY/kWh or so, which significantly more profitable compared given 1.15 off-peak.
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ژورنال
عنوان ژورنال: Energy Science & Engineering
سال: 2022
ISSN: ['2050-0505']
DOI: https://doi.org/10.1002/ese3.1265