1. What Is an Open Cooling Tower?
Open cooling towers reject heat by bringing warm circulating water into direct contact with ambient air. HACST supplies counterflow and crossflow configurations for HVAC, industrial process water, power generation and manufacturing systems. Each tower can be selected around flow rate, entering and leaving water temperature, design wet-bulb temperature, water quality, footprint, sound limits and materials. Options include modular cells, VFD fan control, low-drift eliminators, access platforms and cold-weather protection.Explore HACST cooling tower products, review project case studies, or request a technical quotation.Open Cooling Tower SelectionWhat is the main advantage?Open towers provide efficient heat rejection where direct air and water contact is acceptable.How do I size one?Start with water flow, temperature range, design wet-bulb, water quality, footprint and redundancy.
2. How It Works
Hot water from the system is pumped to the top of the tower and distributed evenly over the fill media (heat exchange surface). As the water flows downward through the fill, a fan draws ambient air upward or across the tower. A small portion of the water evaporates, absorbing heat from the remaining water and lowering its temperature. The cooled water is then collected in the cold water basin at the bottom and returned to the system.
3. Key Features
- High heat transfer efficiency through direct water-air contact
- Simple structure and relatively low initial cost
- Effective cooling even in high ambient temperatures
- Suitable for large-scale heat rejection
4. Common Applications
Open cooling towers are commonly used in power plants, chemical processing, steel manufacturing, HVAC systems, data centers, and various industrial processes where large volumes of water need to be cooled economically.
While highly efficient and cost-effective, open cooling towers expose the process water to the atmosphere, which may lead to water loss through evaporation and drift, as well as potential scaling, corrosion, and bacterial growth (such as Legionella). Regular water treatment and maintenance are therefore essential.
5. Why Choose HACST?
40+ years of industry experience with strong R&D capability (20+ engineers, 10+ invention patents, cooperation with Shandong University and Xi’an Jiaotong University)
Internationally certified: ISO9001, ISO14001, ISO45001, CTI, CE, TÜV, BV, SGS, AS1210, and more
Professional international trade team of over 40 members, fluent in multiple languages
Full support for standard and highly customized solutions (OEM/ODM)
“HACST” and “Hengan” brands are well-recognized worldwide. Our equipment has been exported to over 100 countries and regions and serves as a trusted partner for global companies such as Coca-Cola, Mayekawa, Emerson, SRF, Hamon, and many others.
With strict quality control and comprehensive after-sales service, we are committed to providing reliable, efficient, and eco-friendly cooling solutions.
Welcome to contact us for inquiries or customized requirements. HACST looks forward to being your long-term partner!
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