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Experimental investigation on a capillary tube based transcritical CO2 heat pump system
journal contribution
posted on 2023-05-19, 00:42 authored by Song, Y, Wang, J, Cao, F, Shu, P, Xiaolin WangXiaolin WangIn this study, a transcritical CO2 heat pump system using a capillary tube as an expansion device was experimentally investigated. A prototype was developed for this purpose. Experimental study was conducted under different outdoor and indoor temperatures. The results showed that the system cooling capacity and coefficient of performance (COP) dropped by 22% and 24%, respectively as the outdoor air temperature increased from 30 to 40 °C and increased by 12% and 15%, respectively as the indoor air temperature increased from 22 to 32 °C. The system performance was further compared with the transcritical CO2 heat pump using an electronic expansion valve (EEV) at different gas-cooler outlet temperatures. The comparison results showed that the transcritical CO2 heat pump using the capillary tube is promising and could achieve performance close to the heat pump using EEV over a wide range of gas-cooler outlet temperature.
History
Publication title
Applied Thermal EngineeringVolume
112Pagination
184-189ISSN
1359-4311Department/School
School of EngineeringPublisher
Pergamon-Elsevier Science LtdPlace of publication
The Boulevard, Langford Lane, Kidlington, Oxford, England, Ox5 1GbRights statement
?Copyright 2016 Elsevier Ltd. All rights reserved.Repository Status
- Restricted