How to Select Suitable Copeland Units for Fruit Cold Storage 1

With the advantages of stable operation, strong liquid slugging resistance, high energy efficiency ratio and low failure rate, Copeland scroll condensing units have become the mainstream core equipment for modern fruit fresh-keeping cold storage.

Different from the selection of ordinary freezing cold storage, fruit cold storage has extremely high requirements for temperature accuracy, humidity balance and start-stop stability. The selection of units cannot simply estimate horsepower based on the volume of the cold storage. Improper matching of model, working condition and cooling capacity will easily lead to insufficient temperature reduction, fruit cold damage, severe water loss, excessive energy consumption and premature aging of units. Combining the fruit storage characteristics and technical parameters of Copeland units, this paper systematically explains the standardized selection methods and practical key points of Copeland units for fruit cold storage.

1. Determine Core Working Conditions: Match Special Unit Series According to Fruit Varieties

Each series of Copeland compressors has clear working condition division with distinct applicable scenarios. Fruit cold storage mainly operates under medium and high temperature fresh-keeping working conditions, and mixing low-temperature models is prohibited, which is the primary principle for model selection. Different fruit varieties have different physiological characteristics and suitable storage temperatures, leading to completely different corresponding evaporation temperatures and applicable models.

(1) Cold Storage for Temperate Storable Fruits (0℃～4℃)

Applicable varieties: apples, pears, grapes, kiwis, strawberries, cherries and other low-temperature resistant fresh fruits.

The target temperature of such cold storage is 0～4℃, and the standard evaporation temperature is controlled at -5～0℃, representing the most common fresh-keeping working condition for fruits. Copeland ZB series medium and high temperature scroll compressors are the first choice. Developed specially for medium-temperature fresh-keeping scenarios, this series features reasonable compression ratio and stable operating energy efficiency. Equipped with intelligent protection modules, it is compatible with mainstream environmentally friendly refrigerants such as R404A, R448A and R449A. It can perfectly meet the demand of long-term continuous fresh-keeping operation and serves as the main model for small and medium-sized fruit cold storage.

(2) Cold Storage for Subtropical Fruits (4℃～10℃)

Applicable varieties: citrus, pomelos, peaches, plums, pomegranates, etc.

The storage temperature range is higher with lower heat load inside the warehouse, and the evaporation temperature can be maintained at 0～3℃. The ZB series units are still applicable. Compared with low-temperature cold storage at 0℃, units under this working condition operate with lower load, less energy consumption and smaller equipment loss, delivering better fresh-keeping stability.

(3) High-temperature Fresh-keeping Cold Storage for Tropical Fruits (12℃～15℃)

Applicable varieties: bananas, mangoes, durians, pineapples, pitayas and other cold-sensitive tropical fruits.

Such fruits are prone to cold damage; excessively low temperature will cause black peel and deteriorated pulp. A constant temperature environment of 12～15℃ must be maintained. The selection still focuses on ZB series models adapted to high-temperature conditions, and there is no need to adopt large horsepower low-temperature units. A common engineering misconception is "the larger the model, the better". Blindly selecting ZF low-temperature units will not only double equipment investment, but also cause excessive compression ratio, frequent start-stop of units, excessive fluctuation of warehouse temperature, directly resulting in fruit losses.