Abstract
The involvement of oil lubricants in vapour compression refrigeration (VCR) systems could adversely influence the flow, heat transfer and efficiency of refrigeration. A numerical model for a VCR system using linear compressor, R1234yf, and POE oil is developed in this study to investigate the effect of oil lubricant on the flow and heat transfer as well as the system performance including cooling capacity and coefficient of performance (COP). The proposed model is validated by measurements of a prototype oil-free VCR system with most of the simulated data falling within ± 20 % of measurements. The evaporator heat transfer coefficient, cooling capacity, and COP for the system from the proposed model show a negative correlation with oil circulation rate (OCR). The COPs and pressure losses for oil-free system are 15-28% higher and 36-60% lower than that of oil-lubricated system respectively.
Sign-in/Register to access full text options 
Free) 
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 call
