It is a direct contact tower that is open to the air and is commonly used in industrial facilities where the total heat rate is approximately 450MW.
Hot air rises to the top of the tower, and cold water gets collected at its base. The fresh air is located at the bottom of the natural draft cooling tower and takes advantage of the difference between the hot air at the peak and the air outside the cooling tower.
Principle of the Natural Draft Cooling Tower
Airflow in the natural draft cooling system is obtained through the chimney effect of the tower’s structure, which uses the natural pressure difference. Warm air is slighter and dense, rising out of the tower into the atmosphere, creating perfect airflow. A specific formula calculates the tower’s total height to ensure it is virtually as large as the density difference. Towers using this system tend to be significant which are around 200 meters tall and 150 meters in width. The natural draft cooling tower is the preffered choice for cool climates.
Hot water that needs cooling in the tower is forced in via the hot water inlet. The inlet is attached to nozzles that spray the water above the fill material, providing a large surface area for heat transfer. At the bottom, the structure is open to flex in the fresh air and flows upward. Cold water is collected at the base of the natural draft cooling tower. The moist air is released from the top of the cooling tower into the atmosphere.
Induced Draft Cooling Tower
It generally offers a practical solution to most cooling needs. Towertech supplied many Induced Draft Cooling Towers worldwide for all environmental circumstances. The giant fan at the top of the tower pulls the air up, facing the downward flow of water passing around the wooden packing.
The cold water at the bottom is in contact with bone-dry air, and the hot water at the peak is in connection with humid air, increasing heat transfer efficiency. After many years of developing this technology, the induced draft cooling tower comes in a round and square shape.
Working System of the Induced Draft Cooling Tower
The incoming cooling water is saturated all over the tower with a spray configuration header at the towers. The spray is leveled downwards to perplex for extending the water contact time with air. Maximizing heat transfer is proficient through the cooling water fill controlled by metal, wood, PVC, etc. Through louvers, air enters the interior of the induced draft cooling tower. Air is drawn through the area by giant fans, which causes water cooling. Drift eliminators are used to keep away from the embranglement of the droplets in the leaving air stream.
Industrial application of Natural Draft Cooling Tower
A regular heat transfer rate is needed for the systematic functioning of processes. Natural draft cooling towers are used in many industries, including commercial and HVAC. Especially cooling towers are standard in natural gas, food processing, and petrochemical plants and are all persistent cooling tower applications. The main benefits of these cooling towers are:
- Energy saving
- Low water consumption
- Extended service life
- Low operating cost
They are classified into three categories—Counterflow, Crossflow, and Hyperbolic.
Tips to improve the efficiency of the Natural Draft Cooling Tower
You need to think about small things in the cooling towers that help run your plant. These towers are significant as any piece of equipment. You can improve water efficiency in your natural draft cooling towers and preserve energy.
- Pipe change: Your energy consumption can be managed by changing the water pipe. It is essential to handle the machine carefully. Changing a pipe to release blowdown water to go back can improve the system’s energy efficiency by up to 2%. Consult with professionals who know about tower pipe renewal.
- Focus on recycling: Ensuring your tower is functioning, and recycling is vital for energy preservation, water management, and money saving. High-quality cooling towers are designed for recycling at least 98% of the total wastewater system.
- Infrequently inspection of all equipment: For making sure that cooling systems are correctly working, inspections are an essential part.
If you disregard them, you could end up wasting much more energy. Regularly repairing the cooling system is imperative for maintaining a plant. Look for corrosion, heat transfer areas, or any deposit of foreign particles. The damages can reduce the energy efficiency of a cooling system by at least 5%.
Bottomline
We at Towertech aim to provide you with all the information you may need about the cooling towers. Towertech is your best solution for induced and natural draft cooling towers.
