Performance operation of liquid ejectors for a R744 integrated multi-ejector supermarket system using a hybrid ROM
| Autor: | Krzysztof Banasiak, Jakub Bodys, Sven Försterling, Michal Palacz, Ekaterini K. Kriezi, Jacek Smolka, Ziemowit Ostrowski, Armin Hafner, Andrzej J. Nowak, Michal Haida |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Climate zones
CFD Model business.industry Mechanical Engineering Nozzle 0211 other engineering and technologies Mechanical engineering Refrigeration 02 engineering and technology Building and Construction Injector Refrigeration system Computational fluid dynamics law.invention Reduced-order model Lift (force) Carbon dioxide 020401 chemical engineering law Liquid ejector Mass flow rate Environmental science 021108 energy 0204 chemical engineering business |
| Zdroj: | International journal of refrigeration |
| ISSN: | 0140-7007 |
| DOI: | 10.1016/j.ijrefrig.2019.10.020 |
| Popis: | 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. Performance operation of liquid ejectors for a R744 integrated multi-ejector supermarket system using a hybrid ROM |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect