working principle of water-cooled screw refrigeration unit

I. Water-cooled Screw ChillerOverview
Shenzhen Chuanbenster Refrigeration Equipment Co., Ltd.The water-cooled screw chiller uses a screw compressor for compression refrigeration and water as the cooling medium for heat dissipation. Finally, chilled water for industrial use or air conditioning is produced. It is mainly applied to large equipment matching or central air conditioning systems. The machine body has the advantages of ***, simple operation, easy cleaning, strong refrigeration effect, energy saving and high efficiency. It is an ideal refrigeration equipment for enterprises!

II. Water-cooled Screw ChillerApplication Industries
Applications of screw chillers in the industrial field include: pharmaceuticals, food freezing, plastics, heat treatment, chemical industry, fish farming, cosmetics, artificial leather, electroplating, aluminum oxidation, electrophoresis, electronics, laboratories, etc.
Applications of screw chillers in the commercial field include: central air conditioning systems for office buildings, office towers, hotels, villas, restaurants, factories, shopping malls, hospitals and other places.

III. Characteristics of Screw Chiller Units
1. Compressor: ***, imported high-quality semi-hermetic screw compressors such as BITZER, HANBELL, RefComp, etc. Among them, the 5:6 high-efficiency screw rotor design has an energy efficiency 20 - 30% higher than that of general compressors. It has the advantages of stable and reliable operation, high efficiency, low failure rate and convenient maintenance. For the unit operating under full or partial load, each compressor can be controlled by stepless or 75% - *** step capacity.
2. The shell-and-tube semi-hermetic screw compressor has types suitable for various refrigerant working media such as R22, R407C, R134a, etc.
3. Condenser and Evaporator: The condenser of the screw chiller adopts different types of heat exchange copper tubes imported from Germany, Japan and domestic ones. The outer surface of the copper tube is processed into trapezoidal low-fin tubes to increase the heat exchange area and enhance the heat exchange performance. The inner surface of the copper tube is smooth, which reduces the water pressure and is easy to clean and maintain.
4. The evaporator uses internally threaded high-efficiency heat exchange copper tubes. The spiral smooth outer surface of the copper tube and the non-short-circuit design of the water-side baffle plate improve the mixing and heat exchange efficiency of the chilled water.
5. Refrigeration accessories: The refrigeration accessories adopt world-renowned top brands such as Danfoss, ALCO, SPORLAN, etc., with high quality and excellent performance.
6. Adopt a highly intelligent PLC and PC-level microcomputer control system. It has sensitive response and accurate control. It has multiple functions such as automatic loading and unloading, timing on and off, and recording the cause of faults, and can realize remote or central monitoring.
7. Successfully passed the ISO9001:2000 international quality system certification.
8. When each compressor of the refrigeration system is at the minimum load (25%), it starts with star-delta step-down, effectively reducing the starting current and the impact on the power grid. The exhaust muffler installed in the compressor ensures the low-noise operation of the unit.
9. Automatic start and stop, automatically realizing unmanned operation management according to the scheduled work plan
10. After the product has passed the *** inspection in the factory of Shenzhen Chuanbenster Refrigeration Equipment Co., Ltd. and the full-load operation test and is qualified, it will leave the factory with refrigerant. The *** equipment can start working after the water and electricity are in place.
11. Explosion-proof, *** and other special models can be customized.
12. Multiple protection functions: time delay, water shortage protection, water flow protection, high and low pressure control and display, temperature control and display, overload protection, phase loss and reverse phase protection, anti-freezing protection, fault display, automatic water replenishment and interlocking control circuit

Safety protection function ***
Pressure protection: Automatic protection devices for high and low pressure of the refrigeration system;
Power protection: Under-voltage protection, phase loss protection, reverse phase protection, overload protection, motor overheat protection;
Anti-freezing protection: When the chilled water temperature is too low, the unit will automatically stop;
Safety valve protection: When the refrigerant pressure exceeds a certain value, the safety exhaust valve will automatically open;
Delay protection: Compressor delay start protection to prevent the compressor from starting frequently;
Oil level protection: When the compressor oil level is too low, the protection device will be activated;
Water flow protection: When the water flow stops or decreases and continuing to operate will endanger the unit, the unit will automatically stop;