One of the Chinese fruit industry conglomerates, Ltd., in the beverage processing industry, H.Stars Group, has designed a project for a cold storage and raw material preservation facility for one of the companies in the fruit industry. The project involves an investment with a capacity of 10,000 tons, with a temperature range of 0 ~ 5℃ in the storage rooms, and a total of 9 cold storage rooms.
The quick-freezing cold storage of the project uses two parallel screw-type water-cooled condensing units (model 20STB-L180WTH2). The evaporators use ceiling fans for cooling, and the condensing units use cooling towers. The entire system utilizes a centralized cooling mode and the cooling fans use a water-spray defrost method.
Advantages of the Project:
1. The cold storage uses parallel condenser units to allocate and share cooling capacity between the storage rooms, saving initial investment costs and adapting more flexibly to changing cooling loads due to varying product storage volumes.
2. The condenser units have an additional heat recovery function and provide free hot water for the cold storage.
3. The water tank of the cooling tower is modified to combine with the ice-spray water tank, and the ice-spray water is mixed with the condensed liquid to recover cold and heat energy. This not only improves the efficiency of the quick-freezing condenser but also ensures that the temperature of the ice-spray water doesn’t get too low after multiple cycles.
4. The water defrost system in the project not only saves water but also addresses the issue of ice-spray water temperature by recovering the discharge water for use in the cooling tower.
5. The cooling unit (-18℃) and the cooling fan use a corresponding 1-1 method, ensuring the system is safe and reliable.
6. The cold storage hall uses a low-temperature vestibule to reduce the entry of hot air from outside into the cold storage.
7. The entire project uses a centralized monitoring system, making it easy to operate, with continuous temperature monitoring of the cold storage and an alarm function for cold storage faults.
