Evaluaation the energy potential of compressed air for determining efficiencty of air-accumulating electric

Abstract

The thermodynamics analysis of processes flowing into the storages of compressed air energy are considered in the paper. The exergy balance has been propose as the instrument for study. The main indices have been estimate: the compressed air potential, efficiencies for all elements of the scheme and air-accumulating electric station (AAES) as a whole. The study procedure demonstrated on the example of adiabatic AAES. The relation of final temperatures, specific exergy and compression work per 1000 m3 of atmospheric air to compression ratio are determined. On the base, it can concluded that adiabatic AAES has not high efficiency, but it has some advantages: simple scheme, low investment, and combined well with renewable energy sources, for instance, wind-driven plants. To raise the efficiency of an adiabatic AAES, it should be transform to diabatic type. For that it is required modify the scheme and work regime of its elements, and combined it in complex with gas turbine plants.

Keywords

• energy storages
• air accumulating electric station
• thermodynamics analysis
• exergy method