Abstract
Compressed air energy storage (CAES) is one of the most promising large capacity energy storage technologies and this technology which was used only for demand side management; it has not attained the status of an economic model due to its poor round-trip efficiency. However, in the emerging renewable power scenario, this technology has received a new interest among the scientists. In this present section the concept of energy and exergy analysis for isothermal CAES system under specific assumptions and conditions which augments the round-trip efficiency is discussed and analyzed. Our understanding reveals that when the compressed air is kept at isothermal temperature at atmospheric condition, the mass of air stored in the tank will be high which will reduce the size of the storage tank appreciably for the given capacity. The main conclusions drawn from this work will be of great help by providing course of action for the future development of a high-efficiency Isothermal CAES (ICAES) system for improved power generation/combined with the concept of polygeneration.
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