Tell you about the technical knowledge of screw industrial chillers

The function of screw industrial chillers is to cool the heat source in the industrial production process to reach the temperature required by the process. It is widely used in industrial production processes such as electricity, metallurgy, chemical industry, petroleum, and shipbuilding. It uses a screw compressor and a capillary evaporator, which is not only efficient, but also compact, small in size, and easy to install. It is an efficient and energy-saving chiller.

The screw industrial chiller is mainly composed of a compressor, an evaporator, a condenser, an expansion valve, an oil separator, and a piping system. The screw industrial chiller has the advantages of smooth operation, low noise, high efficiency, and good reliability. It has a compact structure, small size, easy installation, and convenient maintenance.

1. The basic working principle of the screw chiller

The screw chiller is a multiphase refrigeration device with a compression, evaporation, and condensation cycle. The working principle of the screw industrial chiller is: the refrigerant vapor is sucked in by the compressor, compressed into a high-temperature and high-pressure gas, and the high-temperature and high-pressure gas is cooled into a low-temperature and low-pressure liquid through the condenser, and returned to the compressor for compression again. The cooled high-temperature and high-pressure liquid enters the oil separator, and part of the condensed oil is separated and enters the condenser, while the rest flows into the evaporator for evaporation. The evaporated gas returns to the compressor through the oil separator and expansion valve for recompression, and the cycle is repeated so that the low-temperature and low-pressure refrigerant gas is absorbed from the evaporator. Then, the absorbed low-temperature and low-pressure gas is transported to the condenser. The condensate in the condenser returns to the compressor for recompression and circulation, and the cycle repeats.

2. Composition and characteristics of screw chillers

Among them, the compressor adopts a multi-row screw compressor, and the motor drives the screw to rotate at high speed to achieve the purpose of compressing the gas. The evaporator adopts a capillary evaporator, which is characterized by a small cooling area and a high heat transfer coefficient; the oil separator adopts a multi-stage filtration and centrifugal structure, which can effectively separate impurities in the oil and ensure the normal operation of the screw compressor. The screw chiller has the following characteristics:

(1) The whole machine adopts a high-strength cast aluminum frame and stainless steel material, with a compact structure and stable operation.

(2) It adopts a high-efficiency, low-noise screw compressor with stable operation.

(3) Low evaporation temperature, large cooling capacity, high evaporation efficiency, and energy-saving effect.

(4) The equipment runs smoothly, with low vibration, low noise, and stable and reliable performance.

(5) Easy to operate and low maintenance cost.

3. The difference between screw chillers and traditional air coolers

Air coolers use air as the heat exchange medium to exchange heat, while screw industrial chillers use water as the heat exchange medium to exchange heat.