Experimental evaluation of a multiejector CO₂ cooling system of 33 kW cooling capacity is conducted for an Indian supermarket at high ambient temperature context. The test-rig is designed to depict the actual supermarket cooling requirements in India with three different cooling temperature levels s...

A non-equilibrium approach was proposed for highly accurate modelling of the expansion process during two-phase flow in the convergent-divergent motive nozzle of an R744 ejector. Comprehensive mapping of the coefficients used in the source terms of the additional transport equation of the vapour qua...

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 CF...

The complexity of CO₂ layouts for commercial refrigeration installed in warm climates, integrating also air conditioning and heating, with different load ratios, poses challenges in evaluating and comparing energy performances. Both analysis based on first or second law of thermodynamics requires th...

Thermal storage can help to maintain constant temperature in a refrigerated cabinet during defrost cycles or power outage. This contributes to reduced loss in product quality and hence less food being wasted. Dynamic modelling was applied to study the benefits of integrating phase change material (P...

This paper presents the current status of CFD modelling applied to CO₂ two-phase ejectors for refrigeration applications. Previous reviews on CO₂ ejector technology have provided detailed analysis and thorough discussion about the optimal design and performance parameters. However, there is still a ...