Merging traditional single machines into multiple parallel compressor systems, that is, connecting several compressors in parallel on a common rack, sharing components such as suction/exhaust pipes, air-cooled condensers, and liquid receivers, providing all air coolers with Provide refrigerant to bring the energy efficiency ratio of the system to the working state, thereby making the unit work stably, with low failure rate, economy and energy saving.
Cold storage parallel units can be widely used in different industries such as food processing, quick freezing and refrigeration, medicine, chemical industry, and military scientific research. Generally, compressors can use a variety of refrigerants such as R22, R404A, R507A, 134a, etc. Depending on the application, the evaporation temperature can vary from +10℃ to -50℃.
Under the control of PLC or special controller, the parallel unit adjusts the number of compressors to match the changing cooling capacity demand.
The same unit can be composed of compressors of the same type or different types of compressors. It can be composed of the same type of compressor (such as piston machine) or different types of compressors (such as piston machine + screw machine); it can load a single evaporation temperature or several different evaporation temperatures. Temperature; it can be either a single-stage system or a two-stage system; it can be a single-cycle system or a cascade system, etc. Most of them are single-cycle parallel systems of similar compressors.
What are the advantages of parallel units compared to single units?
1) One of the most obvious advantages of a parallel unit is its high reliability. When a compressor in the unit fails, other compressors can still continue to work normally. If a single unit fails, even a small pressure protection will shut down the cold storage. The cold storage will be in a paralyzed state, posing a threat to the quality of the goods stored in the storage. There is no other way but to wait for repairs.
2) Another obvious advantage of parallel units is high efficiency and low operating costs. As we all know, the refrigeration system is equipped with a compressor according to the worst working conditions. In fact, the refrigeration system runs at half load most of the time. Under this condition, the COP value of the parallel unit can be exactly the same as that at full load. , and the COP value of a single unit at this time will be reduced by more than half. Comprehensive comparison, a parallel unit can save 30~50% of electricity than a single unit.
3) High efficiency and energy saving, capacity control can be carried out in stages. Through the combination of multiple compressors, multi-level energy adjustment levels can be provided, and the cooling capacity output of the unit can match the actual load demand. Multiple compressors can be of different sizes to dynamically match the actual load more smoothly, thereby achieving optimal energy regulation for load changes, improving efficiency and saving energy.
4) Parallel units are more comprehensively protected and usually come standard with a full set of safety protections including phase loss, reverse phase sequence, overvoltage, undervoltage, oil pressure, high voltage, low voltage, electronic low liquid level, and electronic motor overload. module.
5) Provide multi-suction branch control. According to needs, one unit can provide multiple evaporation temperatures, effectively utilizing the cooling capacity of each evaporation temperature, so that the system can operate in the most energy-saving working condition.
Gaungxi Cooler Refrigeration Equipment Co.,Ltd.
Tel/Whatsapp:+8613367611012
Post time: Dec-11-2023