Equipment configuration is the core foundation. The type of compressor is of vital importance. Variable-frequency compressors are 25% to 35% more efficient than fixed-frequency models and can adjust the speed as needed to adapt to load changes. The power should be matched with the volume of the cold storage. If it is too small, the temperature cannot be reduced; if it is too large, energy consumption will be wasted. Among the heat exchange components, microchannel condensers and porous evaporators have a heat exchange efficiency that is over 20% higher than that of traditional components. However, they require regular maintenance. A 1mm frost accumulation on the evaporator will reduce its efficiency by 10%, and a 1.5mm scale accumulation on the condenser will increase energy consumption by approximately 9.7%. The insulation layer is made of polyurethane material with a thermal conductivity of 0.022W/(m · K). A 10cm thick layer has a 40% lower cold loss rate than a 5cm thick layer, which can reduce the frequency of supplementary cooling for the unit.

            The usage environment has a significant impact. Air-cooled units rely on environmental heat dissipation. For every 5℃ increase in temperature, their efficiency drops by 8% to 10%, and they may shut down when the temperature exceeds 40℃. When the humidity exceeds 80%, condensation and dust accumulation are likely to occur on the fins of the condenser, reducing its efficiency by 15% to 20%. Installation must ensure that the condenser is at least 50cm away from the wall, with no obstructions above. Insufficient ventilation will cause the efficiency to drop sharply by 30%.

The management of goods and operations should not be overlooked either. Direct storage of hot goods into the warehouse will double the full-load operation time of the unit. The loading capacity should be controlled at 70% to 80%. If it is too full, it will clog the air outlet, and if it is too empty, the utilization rate of the cooling capacity will be low. Each time the door is opened, about 20% of the cold air is lost. It is recommended to use a rapid rolling shutter door to reduce the intrusion of hot air. In addition, the mixture of non-condensable gas (with a partial pressure of 0.196MPa) into the system will increase energy consumption by 18%, and it needs to be regularly vented. Abnormal refrigerant charge can also reduce efficiency and requires professional detection and control.