How reliable is a Water-Cooled Screw Chiller?

First, the screw compressor itself is designed for durability and long service life. Compared with reciprocating or small-capacity compressors, screw compressors operate with fewer moving parts, lower vibration levels, and continuous rotary motion. This significantly reduces mechanical wear and stress. Aurashu selects internationally proven screw compressor platforms with optimized rotor profiles, high-precision machining, and advanced bearing systems, ensuring stable operation even under high load or long operating hours.

Second, water-cooled heat rejection provides inherently stable operating conditions. Unlike air-cooled chillers that are directly affected by outdoor ambient temperature fluctuations, water-cooled screw chillers use cooling water with relatively stable temperatures. This allows the compressor to operate at lower condensing pressures, reducing thermal stress and improving reliability. Aurashu designs condenser systems with optimized water flow paths, high-efficiency heat transfer surfaces, and corrosion-resistant materials to ensure consistent heat rejection over many years of operation.

Third, advanced control and protection systems play a key role in reliability. Aurashu water-cooled screw chillers are equipped with intelligent microprocessor-based controllers that continuously monitor critical parameters such as suction and discharge pressure, motor current, oil temperature, water flow, and refrigerant status. Multiple layers of protection—including overload protection, phase loss protection, high/low pressure protection, and oil system monitoring—help prevent abnormal operation and automatically shut down the unit before damage occurs.

Fourth, partial-load stability and smooth capacity control enhance long-term reliability. Screw chillers are particularly suitable for variable building loads. Through slide valve control or optional variable frequency drive (VFD) solutions, Aurashu units can precisely match cooling output to actual demand. This avoids frequent start-stop cycles, reduces electrical and mechanical stress, and significantly extends component lifespan.

Fifth, system-level reliability is strengthened through engineering customization and redundancy options. Aurashu provides project-specific design services, including multiple-chiller configurations, standby unit planning, and optimized hydraulic system design. In mission-critical applications such as data centers, hospitals, pharmaceutical plants, and industrial production lines, this modular or multi-unit approach ensures that cooling can be maintained even if one unit is temporarily offline for maintenance.

Finally, ease of maintenance and service accessibility contribute to operational reliability. Aurashu water-cooled screw chillers are designed with clear internal layouts, accessible components, and standardized parts. This simplifies routine inspection, oil replacement, tube cleaning, and performance checks. Combined with detailed documentation and technical support, this reduces maintenance errors and unplanned downtime.

In summary, a water-cooled screw chiller offers exceptional reliability due to its robust compressor design, stable water-cooled operation, intelligent controls, smooth capacity regulation, and proven engineering practices. With Aurashu’s focus on quality manufacturing, strict testing standards, and customized system solutions, these chillers are well suited for long-term, high-demand HVAC applications where reliability and continuity are critical.