The scroll compressor chiller is a widely used cooling system in low-capacity applications.
- This chiller operates on a compression refrigeration circuit and is suitable for low to medium thermal loads. It can be equipped with either an air-cooled or water-cooled condenser.
- Each individual scroll compressor typically handles refrigeration capacities of less than 25 tons. To achieve higher cooling power, multiple scroll compressors can be used in parallel.
- Scroll compressors boast high efficiency, and when combined with inverter technology, they can further optimize the efficiency of the chilled water plant.
- The design of parallel scroll compressors requires meticulous lubrication control, which is ideally automated for ease of operation.
- Characteristics of scroll chillers include a hermetic squirrel cage induction motor, cooled by suction gas, contributing to its longevity and stability. The elimination of suction valves in scroll compressors reduces valve losses and enhances efficiency.
- By utilizing multiple scroll compressors, the chiller’s capacity can be adjusted according to the plant’s demand, offering a degree of redundancy in case of compressor failure.
- However, the presence of more compressors may slightly increase the probability of failures, but the overall reliability of scroll compressors due to their few moving parts mitigates this concern.
- Inverter-type scroll compressor chillers enable adaptability to varying cold needs within the plant, improving overall efficiency.
- To maximize the chiller’s performance, an oil equalization system must be implemented to ensure consistent and reliable operation.
- Chillers with scroll compressors are available in various refrigerants, including R22, R407C, R134a, R404A, and R410A.
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