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Product Description

Water Cooled Screw Chiller

The Water-Cooled Screw Chiller stands out as a reliable and efficient industrial cooling solution, featuring a primary component—the screw compressor. This chiller unit utilizes a screw compressor coupled with a water-cooling heat dissipation method, ensuring exceptional refrigeration capacity and consistent performance.

Equipped with a cooling tower or a cooling water circulation system, the chiller utilizes external cooling water for efficient heat dissipation, catering to a diverse range of industrial requirements. With a broad temperature control range and substantial refrigeration capacity, it offers precise temperature control between 3°C to 50°C. This versatility makes it well-suited for various industries, including plastic processing, chemical, pharmaceutical, and more. The Water-Cooled Screw Chiller stands as the ideal choice in industrial cooling, ensuring the stable operation of equipment and processes.

Working Principle

The working principle of a water-cooled screw chiller is based on the cyclic refrigeration process of a screw compressor. In the initial phase, the screw compressor is responsible for drawing in low-temperature, low-pressure refrigerant gas and mechanically compressing it into high-temperature, high-pressure gas. This high-temperature, high-pressure gas releases heat in the condenser, undergoing heat exchange with cooling water to cool down and transform into high-pressure liquid.

Subsequently, the high-pressure liquid refrigerant enters the evaporator through the expansion valve, where it undergoes depressurization and vaporization. During this process, it absorbs heat from surrounding water or process fluid. Finally, as a low-temperature, low-pressure gas, the refrigerant returns to the screw compressor to complete the entire cycle.

This design not only effectively maintains system stability but also provides precise temperature control capabilities, making it suitable for various industries such as plastic processing, chemical, and pharmaceutical. Water-cooled screw chillers stand as an optimal choice for industrial cooling, ensuring the reliable operation of equipment and processes.

Application Industry

Water Cooled Screw Chillers find extensive applications across various industrial sectors, including plastics (injection molding, extrusion), plastic packaging, automotive manufacturing, electronics manufacturing, electroplating, pharmaceuticals, chemicals, ultrasonic cooling, printing, and more. These chillers play a crucial role in maintaining stable operating temperatures for equipment and processes, contributing to improved production efficiency.

Specifically designed for large-scale cooling requirements in production and processing equipment, water-cooled screw chillers are widely employed in the plastic processing industry, covering processes like injection molding and extrusion. Their usage addresses diverse process cooling needs, significantly enhancing the production efficiency and product quality of plastic molding machines.

Product Highlights

Semi-Hermetic Screw Compressor

The water-cooled screw compressor adopts a semi-hermetic screw compressor, renowned for its low noise, low vibration levels, and over 20% energy-saving efficiency. This type of compressor comes with various advantages, including stability, reliability, reduced noise, and minimal vibration.

During the compression process, gas enters the compression chamber from the suction end of the screw. As the screw rotates, the gas is gradually compressed and ultimately discharged through the exhaust end. The unique helical shape and rotational motion of the screw ensure the continuity and stability of the gas throughout the compression process.

Simultaneously, we partner with high-quality screw compressor suppliers to provide premium compressors for the water-cooled screw compressor. This ensures prolonged, efficient, and stable operation of the equipment, delivering outstanding performance for the entire system.

Shell and Tube Evaporator

The Water Cooled Screw Chiller features a shell and tube evaporator in its design. In this configuration, the refrigerant undergoes evaporation within the heat exchange tubes, while water circulates on the shell side. To optimize heat exchange efficiency, a 2mm thick baffle plate is positioned on the shell side, promoting a back-and-forth flow of water to create ice brine. Additionally, insulation material covers the external shell of the evaporator to maintain a consistent operating temperature.

For the heat exchange tubes, high-efficiency seamless copper tubes are utilized. These tubes undergo a grooving process to create internal thread fins, effectively increasing the heat exchange surface area with the refrigerant. This technological enhancement doubles the heat transfer area, significantly improving overall heat transfer efficiency.

Shell and Tube Condenser

The water-cooled chiller incorporates a shell and tube condenser featuring internal copper tubes processed with an outer thread embossing technique. This design is strategically implemented to significantly boost the efficiency of heat exchange between the refrigerant and water.

In comparison to traditional smooth copper tubes, the outer thread embossing process serves to increase the surface area of the copper tubes. This expansion of contact area enhances heat exchange and improves the thermal conductivity of the condenser. The optimized design of the water-cooled chiller’s condenser enables a more rapid and consistent transfer of heat from the refrigerant to the water, allowing the water to efficiently carry away the heat generated in the process.