Transcritical R744 Supermarket Refrigeration System Integrated with a Heat-Driven Ejector Chiller
Source abstract
Abstract
The subcooling potential of a novel R717-based waste heat-driven multi-ejector chiller (HEC) integrated with an R744 refrigeration system was evaluated for use in supermarkets. The performance was compared with an R744 refrigeration system coupled to R718- and R600a-based HECs, an R744 system equipped with parallel compression (PC), and a standard R744 booster system (CB) in various warm and hot climatic locations. Integration of the R717-based HEC was found to improve the coefficient of performance by 3.7% at 27 °C to 12.1% at 45 °C compared to the R718, and by 1.6% at 27 °C to 7.6% at 45 °C compared to the R600a-based system. The energy-saving potential of the R717 system (6.2% to 9.4%) was also found to be higher than that of the R718 (0.7% to 2.8%) and R600a systems (2.5% to 6.6%). The use of the existing high-pressure controllers of the CB system was found to impose a relatively lower penalty on the system performance compared to the controllers of the PC system. Although the integration of the R718 system incurred a significantly lower additional investment, the recovery time of the R600a-based HEC (2.3–4.8 years) was found to be the shortest.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Refrigeration and Air Conditioning Technologies · Advanced Thermodynamic Systems and Engines · Heat Transfer and Optimization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Smart Building Lab, Department of Mechanical Engineering, BITS, Pilani 333031, Rajasthan, India
Institute of Mechanical and Electrical Engineering, University of Southern Denmark (SDU), Alsion 2, 6400 Sønderborg, Denmark
Danfoss A/S, Nordborgvej 81, 6430 Nordborg, Denmark
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