200kW Dry Cooler to be used with Glycol

200kW Dry Cooler to be used with Glycol

Working Principle

The glycol solution flows inside the tubes of the dry cooler, and the outdoor air flows outside the tubes. Through the tube wall and fins, heat is transferred from the high - temperature glycol solution to the air. The fan of the dry cooler forces the air to flow, continuously taking away the heat on the fin surface, thereby reducing the temperature of the glycol solution.

Characteristics and Advantages

Low - temperature Resistance: Glycol solution has a lower freezing point than water. For example, a 30% glycol solution has a freezing point of - 28°C, and a 50% glycol solution has a freezing point of - 35°C. This enables the dry cooler to work normally in low - temperature environments without the risk of the cooling medium freezing.

Energy - saving: In some cases, when the outdoor temperature is low enough, the dry cooler can completely rely on natural cold sources to cool the glycol solution, reducing or even eliminating the need for mechanical refrigeration, thus achieving significant energy - saving effects. For example, in data centers, when the glycol return water temperature and the room temperature differ by more than 14°C, the dry cooler can completely replace the compressor for refrigeration.

Corrosion Resistance: Compared with some other cooling media, glycol solution has relatively good chemical stability and is less likely to corrode the tubes and other components of the dry cooler. However, in actual use, appropriate corrosion inhibitors may still be added according to specific requirements to further improve the corrosion resistance of the system.

No Water Consumption: The dry cooler works by air - cooling without direct water consumption, which is very suitable for water - scarce areas or occasions where water conservation is required.

Structural Design

Coil: Usually made of copper tubes or stainless - steel tubes. Copper tubes have good thermal conductivity, which is beneficial to heat transfer; stainless - steel tubes have strong corrosion resistance. The outer surface of the coil is equipped with fins, mostly made of aluminum, to increase the heat - dissipation area. For example, some dry coolers use 0.15 - mm - thick aluminum fins and copper tubes with a diameter of 12 or 16 mm, with a fin spacing of 2.1 mm.

Fan: The fan is an important component for forcing air flow. High - quality fans are usually selected, such as maintenance - free Ziehl - Abegg fans. The fan motor usually has a protection level of IP54 and an insulation level of F.

Casing: The casing is generally made of galvanized plate or stainless - steel plate, which has good corrosion resistance and mechanical strength. The galvanized plate casing is usually powder - coated to further improve its corrosion resistance and appearance quality.

Application Fields

Dry coolers using glycol are widely used in data centers, industrial manufacturing, petroleum, and other fields. In data centers, they can provide a stable cooling environment for servers and other equipment; in industrial manufacturing, they are used for cooling process fluids in various production processes, such as in the semiconductor chip manufacturing, precision machinery manufacturing, and other industries.