Comparison of the performance of different configurations of the combined absorption-compression refrigeration cycle with a simple absorption cycle from a thermo-economic point of view
نویسندگان
1 Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran.
2 Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran.
doi
10.30501/jree.2025.522907.2398چکیده
In this study, two common configurations based on three pressure levels have been analyzed and compared from a thermo-economic perspective with a simple absorption chiller. All examined systems have been powered using a flat-plate solar collector, in conjunction with a storage tank, as the primary energy source. Variables such as generator temperature variations, pressure ratios in the lower and upper compressors, effects on COP, exergy efficiency of the chiller, solar energy efficiency, exergy efficiency of the solar system, total cost rate, and exergy cost per unit of cooling production have been investigated. This research has been modeled using EES software. The simulation results indicate that modifications to compressor pressure levels and adjustments to generator temperature exhibit complex impacts on the thermo-economic behavior of the system, where in some cases they enhance performance, while in others they lead to efficiency decline. Furthermore, the total system irreversibility is estimated to be 328.1 kW, of which 89 percent, equivalent to 251.9 kW, is attributed to exergy destruction in the solar collector. Additionally, the total cost rate associated with the solar collector is estimated at $75.053 per hour, accounting for 88.09 percent of the overall system cost, which amounts to $85.19 per hour.
