In this paper. the transcritical CO2 refrigeration system with ejector is applied to a commercial ultra-cold cabinet. The influence of the key operating parameters of the ejector on the system performance is analyzed. and the measurement method of the experimental parameters is proposed. https://www.roneverhart.com/BenQ-Zowie-XL2546X-24-5-FHD-Fast-TN-Gaming-Monitor-240Hz-DyAc-2-Technology-Dual-Backlight-Design-Auto-Game-Mode-HDMI-/