There is no single "optimal" refrigeration method that fits every situation; the choice depends on factors such as cold storage size, usage scenario, and budget. Below are suitable solutions for different scenarios:
Small-scale cold storage (under 50 m²; e.g., fresh food shops or commercial kitchen storage)
Opt for hermetic piston air-cooled units. These are "plug-and-play" systems that do not require a dedicated machine room or cooling water system maintenance, making them ideal for intermittent, low-frequency operation.
Medium-scale cold storage (50–500 m²; e.g., food processing plants or distribution hubs)
Semi-hermetic screw units paired with evaporative condensers are recommended. This setup is over 20% more energy-efficient than purely air-cooled systems, supports continuous operation of more than 8 hours a day, and balances system stability with energy efficiency.
Large-scale cold chain centers (over 500 m²)
Utilize screw compressor rack systems with a secondary refrigerant loop. This configuration ensures that the failure of a single unit does not disrupt overall operations and allows for precise temperature control, meeting the demands of high-capacity, high-load, 24/7 continuous operation.