AVIC Shenyang Liming Aero Engine Co., Ltd

Due to the production requirements of the process, customers need to cool year-round, and the demand for cooling capacity is high. If conventional air-cooled screw chillers are used, the operating cost is very high. Based on our understanding of the customer's energy consumption requirements and the temperature conditions in the usage area, our company has developed an energy-saving solution with natural cooling on top of conventional air-cooled screw chillers. In summer, the compressor of the unit starts running, which is consistent with the conventional air-cooled screw chiller unit, and the natural cooling coil is turned off. During the transitional season, when the ambient temperature reaches two degrees or more lower than the return water temperature of the refrigeration cycle, the natural cooling coil is turned on to cool down. This part is natural cooling refrigeration and has no compressor power consumption. When the natural cooling part fails to meet the temperature requirements, compression assisted refrigeration is used to meet the demand. In winter, when the ambient temperature reaches 8 degrees or more lower than the return water temperature of the refrigeration cycle, natural cooling starts until it reaches 100% of the unit's cooling capacity, completely natural cooling refrigeration, the compressor system is turned off, the unit has no compressor power consumption, and only a small amount of fan operating power. When the ambient temperature further decreases, the number and power of fans will also increase or decrease accordingly, and the unit will be intelligently controlled.