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Abstract

In order to research the adaptivity of the capillary tube in the transcritical CO2 refrigeration system, a separated flow model of a CO2 capillary in which the metastable phenomenon was taken into consideration was built in the simulation of transcritical CO2 refrigeration system, and related experiments were carried out by a plant under different gas-cooler outlet temperatures. The performances of the capillary based system were further compared with that of the EEV (electronic expansion valve) based system. The results showed that the relative COP ranged from 82% to 98% when there was a 10°C deviation between the real gas-cooler outlet temperature and the design value. Thus the capillary based transcritical CO2 system is promising and could achieve performance close to that of EEV based system in a wide range of gas-cooler outlet temperature.

Item Type:	Article
Authors/Creators:	Song, Y and Wang, J and Cao, F and Shu, P and Wang, X
Keywords:	adaptivity, capillary tube, metastable state, transcritical CO2 refrigeration
Journal or Publication Title:	International Journal of Refrigeration
Publisher:	Elsevier Sci Ltd
ISSN:	0140-7007
DOI / ID Number:	https://doi.org/10.1016/j.ijrefrig.2017.04.013
Copyright Information:	© 2017 Elsevier Ltd and IIR. All rights reserved.
Related URLs:	Google Scholar: Wang, X UTAS Profile: Wang, X
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