All About Cooling Tower Makeup and Blowdown

  • 5 March 2024
  • Author: Chem-Aqua, Inc
  • Number of views: 1929
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All About Cooling Tower Makeup and Blowdown

Cooling towers use makeup water to replace the water lost through evaporation and blowdown, as shown in Figure 1 below.  Typically, city or well water is used.  The quantity and quality of these waters can be easily measured with water meters and analytical equipment. 

Causes of Cooling Tower Foaming

  • 11 July 2023
  • Author: James McDonald
  • Number of views: 5265
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Causes of Cooling Tower Foaming

By design, recirculating aerated water cascades through cooling towers to extract unwanted heat to the atmosphere. When foaming occurs, it can have negative impacts on both the cooling tower system and the surrounding environment. Foaming can not only confuse sensors and damage nearby equipment and car paint, it can also serve as a carrier for Legionella bacteria. Cooling water can foam due to a multitude of reasons. In some cases, it is even the result of a combination of factors. Some reasons cooling tower foaming may occur include:

Reducing Water Costs in Building HVAC Systems

  • 5 April 2022
  • Author: Chem-Aqua, Inc
  • Number of views: 3154
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Reducing Water Costs in Building HVAC Systems

The HVAC system is the largest user of energy and water in typical commercial buildings. In the past, energy costs overshadowed water costs. Recent droughts and the need to expand municipal water supplies to support growth have led to increased water costs nationwide. Combined with the focus on water conservation in green buildings, the payback associated with reducing building water usage is greater than ever. Most commercial buildings use water cooled chillers to provide air conditioning because they are much more energy efficient than air-cooled chillers. Achieving these efficiencies, however, requires large quantities of water to operate a cooling tower. Most buildings also use re-circulating hot and chilled water loops to distribute heating and cooling throughout the building. Although not designed to routinely use water, these systems can use large amounts of water if undetected leaks occur. As the major consumer of water, the building HVAC system is an obvious target for water conservation efforts and often provides significant saving.

The Relationship Between Biocide Contact Time and Holding Time

  • 23 November 2021
  • Author: Chem-Aqua, Inc
  • Number of views: 9162
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The Relationship Between Biocide Contact Time and Holding Time

Microbiological problems in cooling water systems cost businesses billions of dollars each year due to high energy costs, production losses, unscheduled maintenance, and replacement of corroded parts. Poor microbiological control can also lead to unsafe operating conditions, such as contamination by the bacterium that causes Legionnaires’ disease. While this article focuses on biocide contact time, there are many factors to consider when choosing the correct biocide, including:

How Do Adiabatic Cooling Systems Work?

  • 9 November 2021
  • Author: Chem-Aqua, Inc.
  • Number of views: 15670
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How Do Adiabatic Cooling Systems Work?

In terms of raw energy efficiency and the ability to provide precise cooling under fluctuating load conditions, recirculating evaporative cooling water systems with chillers or heat pumps are the most efficient way to remove heat from a process or building air. However, adiabatic cooling systems can be a good fit with an overall lower cost for heat removal in some climates and applications.

Water Treatment for Evaporative Condensers

Important Differences You Need To Know

  • 11 May 2021
  • Author: Tim Daniels
  • Number of views: 9265
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Water Treatment for Evaporative Condensers

Evaporative condensers are commonly used for heat rejection in low temperature ammonia refrigeration applications in cold storage and food processing plants. Although often confused with standard cooling towers, there are some key differences between evaporative condensers and the cooling tower systems used in HVAC applications. Understanding these differences and the challenges they present is important for water treatment program success.

Don't Let Biofilms Take Control of Your Cooling Tower System!

Don't Let Biofilms Take Control of Your Cooling Tower System!

Biofilm deposits are one of the most difficult challenges your cooling water systems face. They tend to start in areas not accessible to biocide treatments, and can quickly grow to form biofouling deposits that can cause corrosion damage, blockages, reduced heat transfer, and amplify the growth of Legionella bacteria. Once they become established, biofilms are incredibly tenacious and difficult to remove.

Chlorine and Bromine Testing In Cooling Tower Systems

What You Need to Know

  • 25 June 2019
  • Author: Allan Browning
  • Number of views: 21828
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Chlorine and Bromine Testing In Cooling Tower Systems

Chlorine and bromine based biocides are widely used for microbiological control in cooling tower systems. These halogen compounds form strong oxidizing agents in water, which is how they kill bacteria and other microorganisms. Routine testing is important to confirm effective halogen residuals are maintained. Low residuals can result in poor microbiological control. High residuals can cause corrosion and destroy inhibitors.

Cottonseed and Other Spring Associated Problems

How to Keep Your Cooling Tower Clean

Cottonseed and Other Spring Associated Problems

Every spring we welcome the milder weather, and with it, various plant and animal life. However, not all of nature’s gifts are beneficial to our evaporative cooling systems; especially the outdoor cooling towers that reject heat from our commercial, institutional, and industrial facilities. Late wintry storms can cause ice and snow accumulation. Heavy rain and hail can disrupt the anticipated easing of the harsh environmental conditions of winter.

How To Prepare Your Cooling Towers for Winter

Take Precautions to Avoid Issues

  • 20 November 2018
  • Author: Chem-Aqua, Inc
  • Number of views: 11760
  • 0 Comments
How To Prepare Your Cooling Towers for Winter

With the cooler months upon us, it is important to prepare your cooling towers for freezing temperatures. Even in extremely icy conditions, cooling towers can be operated successfully if proper precautions and protocols are followed. A frozen cooling tower is a major issue for business operations as well as from a cost standpoint.  Now is the time to prepare for winter weather.

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