Abstract
Performance maps were generated for designed liquid ejectors installed in a multi-ejector module in an R744
integrated supermarket system using a hybrid of the reduced-order model (ROM). Hybrid ROMs of the investigated
liquid ejectors were developed based on experimental data and CFD results. The CFD model achieved
satisfactory accuracy at motive nozzle pressures above 59 bar, and the hybrid ROM improved the mass flow rate
prediction. Maps were generated for the motive nozzle mass flow rate and the mass entrainment ratio at different
ambient conditions related to cold, moderate, and hot climate zones. The set of the pressure lift for ejector
efficiency maximisation at different ambient conditions is presented for refrigeration and air-conditioning applications.
The developed liquid ejectors hybrid ROMs can be used to optimise work of the R744 integrated supermarket
system equipped with the vapour and liquid ejectors. © 2019 Published by Elsevier Ltd.
integrated supermarket system using a hybrid of the reduced-order model (ROM). Hybrid ROMs of the investigated
liquid ejectors were developed based on experimental data and CFD results. The CFD model achieved
satisfactory accuracy at motive nozzle pressures above 59 bar, and the hybrid ROM improved the mass flow rate
prediction. Maps were generated for the motive nozzle mass flow rate and the mass entrainment ratio at different
ambient conditions related to cold, moderate, and hot climate zones. The set of the pressure lift for ejector
efficiency maximisation at different ambient conditions is presented for refrigeration and air-conditioning applications.
The developed liquid ejectors hybrid ROMs can be used to optimise work of the R744 integrated supermarket
system equipped with the vapour and liquid ejectors. © 2019 Published by Elsevier Ltd.