How to make the supermarket open refrigerators more energy-efficient?
Open refrigerators are essential for showcasing perishable goods, but their energy consumption accounts for up to 70% of a supermarket’s total cooling costs. At present, there are a lot of literatures on the matching of display refrigerator units, refrigeration system optimization design and energy-saving measures. The energy-saving technology improvements of display refrigerators are mainly concentrated in the following three aspects.
Refrigerator Structural Improvements
Environmental Control
- Over 50% of energy loss stems from external hot air infiltration.
- When humidity rises from 40% to 57%, defrost energy consumption doubles.
- Recommends maintaining supermarket conditions at ≤24°C and ≤55% humidity (using dehumidifiers).
System Optimization
Replacing single large compressors with parallel small units saves 20% energy.
Implementing "supercooled" refrigerant cycles boosts cooling efficiency by 40%.
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