How should the cooling tower and pumps be selected?

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Selecting the cooling tower and pumps correctly is essential to ensure the performance, efficiency, and long-term reliability of Aurashu falling-film and flooded water-cooled chiller systems. Because these chillers rely on high-precision heat exchange at the evaporator and condenser, the supporting hydronic equipment must match both the thermal load and the operating characteristics of the chiller.

For cooling towers, the key factors include heat rejection capacity, approach temperature, water flow rate, ambient wet-bulb temperature, and tower configuration. Falling-film and flooded chillers typically operate at lower condensing temperatures for higher energy efficiency, so the cooling tower must provide stable performance even under varying loads. Proper tower sizing prevents excessive condensing pressure, reduces compressor power consumption, and ensures optimal seasonal energy efficiency. Aurashu typically recommends selecting towers with an approach of 3–5°C, high-efficiency fill media, corrosion-resistant structure, and drift eliminators to protect water quality and system durability.

Pump selection must consider system head, flow stability, variable flow compatibility, and energy efficiency. For condenser pumps, stable flow is critical to maintain consistent condensing temperature and avoid tube scaling or insufficient heat rejection. For chilled-water pumps, especially in large central cooling plants, variable-speed pumps can significantly reduce energy consumption under partial loads. Aurashu systems support optimized pump selection through advanced controls that manage flow rate, water temperature differential, and pump sequencing.

Other important considerations include water treatment system capacity, piping design, air elimination, expansion tanks, and control integration. The cooling tower and pumps must be matched to the chiller’s evaporator/condenser water quality requirements, especially for falling-film evaporators where surface wetting uniformity is essential for efficient heat transfer. Proper selection reduces fouling risk, enhances heat transfer stability, and extends the service life of core components.

Aurashu provides professional engineering support for cooling tower and pump selection, including thermal calculations, system layout guidance, and recommended equipment specifications. Through accurate integration of chiller, tower, and pump systems, Aurashu ensures the entire plant operates with high reliability, low energy consumption, and long-term operational stability.