Abstract
The effect of PAG oil concentration on the heat transfer performance and pressure drop of a fin-tube heat exchanger using carbon dioxide(CO2) heat pump during the gas cooling process of CO2 was investigated by experiment. The experimental apparatus consisted of a gas cooler, a pre-heater, a sub-cooler, a mass flow meter, pumps and a measurement system. Experiments were conducted for various conditions of inlet temperature(110°C), mass flow rate of refrigerant(50, 55, 60, 65, 70 g/s) and PAG oil concentration(0 to 2.6 wt%). The heat transfer rate decreased with the increase of the oil concentration and the decrease of the inlet pressure. And the pressure drop increased with increases of the oil concentration and the mass flow rate of the refrigerant. The COP reduction by the deterioration of gas cooler performance with oil concentration was analyzed. When the inlet pressure of the gas cooler was 100 bar, the COP reduction was estimated to be 6% under 1 wt% of oil concentration.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
