Intermittent behavior of renewable energy triggered researchers for using energy storage systems to provide
continues operation of renewable-based energy systems. In the current study, an integrated energy system
including compressed air energy storage, Rankine cycle, Proton Exchange Membrane (PEM) fuel cell (FC), and
thermoelectric generator (TEG) modules are investigated to introduce a new system. To show effects of adding
TEG units and PEM fuel cell in the new configuration, three arrangements including conventional compressed air
energy storage system (CAES), CAES/TEG and CAES/TEG-FC are investigated. It is found that the proposed
CAES/TEG-FC system energy efficiency is 31.85%, which is 1.6% higher than conventional CAES. The exergy
efficiency of CAES/TEG-FC is 35.13%, which is 1.44% higher than the conventional one. The proposed system
generates 35.6 kW hot water and charge/discharge time are 2.91 hr/4.64 hr. A parametric analysis conducted on
the discharge mass flow rate, intercooler outlet temperature, compression pressure ratio, and wind velocity with
charging time, exergy efficiency, and total useful products as three major outputs. The tri-objective optimization
shows by the technique for order of preference by similarity to ideal solution the optimized value of exergy
efficiency, total useful output, and charge time are 34%, 1078.46 kW, and 5.28 hr.