The project is located in Qingdao, Shandong Province, and is a cold source project for quick freezing machines and pre cooling machines. Refrigerant: R507, liquid supply system: barrel pump for liquid supply. 2. -4 3 ℃ evaporation system (Phase II/: providing cold source for 15+single freezers: refrigerant: R507, liquid supply method: barrel pump supply). 3. -5 ℃ evaporation system: provides 0 ℃ cold water for the pre cooling machine: refrigerant: R507, refrigerant: propylene glycol, liquid supply method: pump supply.
