@inproceedings{6a664fce63814e27bf4ff1ce61be865a,
title = "Application of vortex control to a transcritical R744 ejector cycle",
abstract = "This paper presents results of a novel expansion device refrigerant flow control mechanism called vortex control. The key advantage of this control mechanism is being far less vulnerable to clogging than conventional expansion devices since the flow control is achieved without having to adjust the cross-sectional flow area in order to achieve the desired modulation effect. Vortex flow control is seen as particularly promising when applied to transcriticalR744 ejectors, where flow control of the motive nozzle is known to substantially impact ejector and cycle efficiencies. Vortex control can potentially offer the advantage that overall ejector efficiency is less impacted than designs where a needle is used to modulate the motive nozzle flow. The effects of operating conditions were investigated experimentally. It is shown that vortex flow control appears to be feasible for two-phase ejectors using R744 and similar flow modulation ranges as with needle control were achieved.",
keywords = "Carbon dioxide, Ejector, Flow modulation, Motive nozzle, Two-phase, Vortex control",
author = "Jingwei Zhu and Stefan Elbel",
note = "The authors would like to thank the member companies of the Air Conditioning and Refrigeration Center at the University of Illinois at Urbana-Champaign for their support.; 5th IIR Conference on Sustainability and the Cold Chain, ICCC 2018 ; Conference date: 06-04-2018 Through 08-04-2018",
year = "2018",
doi = "10.18462/iir.iccc.2018.0005",
language = "English (US)",
series = "Refrigeration Science and Technology",
publisher = "International Institute of Refrigeration",
pages = "53--61",
booktitle = "5th IIR Conference on Sustainability and the Cold Chain, ICCC 2018 - Proceedings",
}