Freezing Weather Operation

During periods of low ambient air temperatures, 35°F to 40°F (2°C to

▲ Note4°C) or below, it is advisable to maintain the cold water temperature at or above 70°F (21°C) to retard the formation of ice and to assist in its control. The methods used in Minimizing Tower Energy Use, described on page 13 are those which the operator would use to maintain water temperature at or above 70°F (21°C).

In combinations of low ambient air temperatures and reduced loads, fan speed manipulation may not be sufficient to maintain an acceptable water temperature. Even with fans off, the natural movement of air through the tower may be enough to continue reducing the water temperature. When that happens, it will become necessary to open the bypass valve, if so equipped, and allow total circulation to flow directly into the cold water basin until such time as the basin water inventory rises to a temperature level sufficiently high to preclude frequent changeovers from normal flow to bypass flow. That temperature level might be 85°F to 90°F (29°C to 32°C), but should be determined by operator experimentation.

Deicing

The formation of ice on towers operating in freezing weather cannot be completely prevented, but can be acceptably controlled. Ice will form on the relatively dry parts of the tower that are in contact with the incoming air. Primarily, this includes the columns, structural framing, and fill at the air inlets. Ice forming characteristics on any given tower will vary, depending on velocity and direction of wind, circulating water rate and heat load.

The Class 800 tower is designed with few structural components in the falling water zone, which prevents damage due to falling ice. However, structural damage can still result from excessive buildup of ice attached to the fill.

A regularly programmed inspection (one walk around the tower per shift) during cold weather operation is the best way to determine if ice buildup on the fill is occurring. If ice is observed and determined to be acceptable, maintain full (total) design flow over the tower. Excessive ice formation may be controlled by regulating air and water flow through the tower by one or more of the following procedures:

•Shut the fan down. This reduces the cooling rate to a minimum and increases the quantity of warm water at the air inlet to a maximum. Ex- cept for extreme cold conditions or extended freezing conditions, this procedure will normally control ice formation. If the tower has two-speed motors, operate the fan at half speed forward. This also reduces the cooling rate and increases the quantity of warm water at the air inlet.➠

11

Page 10 Page 12
Page 11
Image 11
SPX Cooling Technologies 800 user manual Freezing Weather Operation, Deicing
Page 10 Page 12

800 specifications

SPX Cooling Technologies 800 is a highly advanced cooling tower designed for commercial and industrial applications. This state-of-the-art equipment is recognized for its efficiency, reliability, and robust construction. The 800 model is engineered to meet the demanding needs of modern cooling processes, ensuring optimal performance in various settings.

One of the main features of the SPX Cooling Technologies 800 is its innovative design which contributes to superior heat transfer capabilities. The large surface area of the cooling fill maximizes the interaction between air and water, enhancing cooling efficiency while reducing operational costs. This design also supports effective thermal performance with lower water consumption, making it an environmentally friendly option for businesses.

The unit's fan technology is another standout characteristic. The SPX Cooling Technologies 800 employs low-noise, high-efficiency axial fans that optimize airflow while minimizing sound levels. This consideration for noise reduction makes it ideal for installation in noise-sensitive environments without compromising on performance.

Moreover, the 800 model incorporates a corrosion-resistant casing, fabricated from high-quality materials like fiberglass-reinforced plastic. This durability ensures a long service life and reduces the need for frequent maintenance, which in turn lowers operating costs. The design also allows for easy access to internal components, streamlining servicing and inspection processes.

SPX Cooling Technologies has also integrated advanced automation features into the 800 unit. With intelligent control systems, operators can easily monitor and adjust performance parameters remotely. This capability enhances operational efficiency and allows for predictive maintenance, ultimately extending the equipment's lifespan.

This model is suitable for a variety of applications, including industrial manufacturing, commercial HVAC systems, and process cooling. The flexible design options and customizable configurations allow it to meet specific site requirements, ensuring compatibility with existing infrastructure.

In summary, the SPX Cooling Technologies 800 stands out in the market for its combination of high performance, durability, and efficiency. With features such as advanced fan technology, corrosion-resistant materials, and intelligent automation, it offers a comprehensive solution for modern cooling needs, catering to a diverse range of industries while promoting sustainability and cost-effectiveness.
Top Page Image Contents