examination of the performance of cooling energy storage system in partial storage mode

One strategy to reduce the power consumption in air-conditioning (ac) systems is employing ice thermal energy storage (ites) systems. ites facilities are categorized into two groups, full and partial storage modes (fsm and psm). in this work, initially, an ac integrated with an ites system is modeled and studied in partial load operating mode. the seap2 multi-objective optimization method and multiobjective particle swarm optimization (mopso) were applied for computing the optimum amounts of design parameters. exergy efficiency and total annual cost were considered as two objective functions in multi-objective optimization. the obtained results indicated a difference in the optimum value of the model to the outcomes of the first objective function (exergy efficiency) and the second objective function (total costs). the maximum exergy efficiency for the multi-objective mode in psm was 39.12%, and the minimum cost was 1152  105 us$. moreover, an assessment of the model displayed that by using ites, electricity consumption was reduced by 11.83% in psm. also, because of heat transfer of cooling load from the peak hours to non-peak hours and reduction of power consumption by 35.12%, there was a reduction in total costs in psm. the results confirmed that the payback period for the proposed system was3.43 years. the environmental assessment revealed that this type of system reduces co2 production. in the end, the influential impacts of using various types of pcms as the construction have been studied.