What is Cross Flow Cooling Tower

 

 

Cross flow cooling tower is an induced draft cooling tower that can cool water. Cross flow cooling towers are a type of heat exchange system used in various industrial processes and HVAC (heating, ventilation, and air conditioning) systems to remove excess heat from the surroundings. The cross flow cooling tower can operate with very much lower-than-design levels of flow, as little as 30%. Since the only mechanism pulling down the water through the nozzles is gravity, these towers can provide even water distribution across the fill.

 

Benefits of Cross Flow Cooling Tower

 

 

Compact Design: Cross flow cooling towers have a more compact design compared to other types of cooling towers, making them suitable for installations with limited space or height constraints. Their vertical structure allows for efficient use of space.

 

Energy Efficiency: These cooling towers typically consume less power due to their design and operation. The water distribution system and air movement mechanisms result in lower energy requirements, leading to reduced operational costs.

 

Effective Water Distribution: The fill material inside cross flow cooling towers ensures even water distribution, maximizing the surface area available for heat exchange between water and air. This helps in achieving better cooling efficiency.

 

Lower Noise Levels: Cross flow cooling towers tend to produce less noise during operation compared to other types, which is advantageous when the cooling towers are located near residential areas or noise-sensitive environments.

 

Easy Maintenance: The design simplicity of cross flow cooling towers makes them easier to maintain and clean. Access to internal components and fill material is typically more straightforward, simplifying maintenance tasks.

 

Improved Water Conservation: Cross flow cooling towers can be designed with features like drift eliminators, which help minimize water loss due to evaporation. This contributes to water conservation efforts and reduces the overall water consumption of the cooling system.

 

Why Choose Us

 

 

Years of Experience
Wuxi Keju Machinery Manufacturing Co., Ltd. is a high-tech enterprise in Jiangsu Province and is professionally engaged in cooling system development, design, manufacturing, sales, and service. And has 10+ years of experience in the cooling system field.

 

Quality System Certification
The company has passed 1OS9001-2008 Quality Management System Certification and worked out Q/320211JDM01-2013 Enterprise Standards. The company was also rated excellent management enterprise of the heat treatment industry in China, third-level enterprise of work safety standardization (machinery) in Wuxi City, cleaner production enterprise in Wuxi City and advanced energy conservation and emission reduction enterprise, and so on.

 

Professional Technical Team
After more than 10 years of continuous development and growth, the company now has formed a technical personnel team with complete and very high professional level and a production team with strong implementation force.

 

Excellent Services
The company can complete tasks with high quality and high efficiency, provide users with the best possible services, and also provide on-site training services, enabling operators to master the knowledge and experience necessary for operation, maintenance, and repair.

 

Cross Flow Closed Loop Cooling Tower

 

Working Principle of Cross Flow Cooling Tower

Water flows through the fill media, which increases the contact surface, are as well as the contact time between air and water for better heat transfer. Cross flow means the airflow is directed perpendicular to the water flow. Air enters through one or more vertical faces of the cross flow cooling tower to meet the fill material. Water flows through the fill by gravity. The air continues through the fill and thus past the water flow into an open plenum volume. Lastly, a fan forces the moisture laden air out into the atmosphere.

 

 

Material of Cross Flow Cooling Tower

The material used includes galvanized steel, stainless steel, glass fiber, and concrete are commonly used. Plastics are widely used for fill including PVC and polypropylene. Treated wood splash fill is still used to this day when water conditions demand the use of splash fill. Nozzles are currently made of PVC, ABS and glass-filled nylon. Fans are made of galvanized steel, aluminum, or molded glass fiber reinforced with plastic.

Closed Type Crossflow Cooling Tower

 

Comparison Between Counter Flow Cooling Tower and Cross Flow Cooling Tower
 
 
Principle

Counter flow cooling tower: The air is vertically upwards, counter current with the hot water falling downwards.The coldest water comes in contact with the coolest and most dry air,optimizing the heat transfer and obtaining the maximum performance.
Cross flow cooling tower: The air flows horizontally and the water falling downwards meets the air at different temperatures. Therefore the heat transfer is not always optimized.

 
Area

Counter flow cooling tower: The tower area required is comparatively much smaller. The air water contact is more due to the efficiency and arrangement of the fill pack. The plenum chamber area for hot air in this tower is smaller.
Cross flow cooling tower: The area required is larger due to its constructional features like larger plenum chamber. Also the arrangement and material of the pack is different and requires a higher area.

 
Air Flow

Counter flow cooling tower: Since the air-water contact time is higher, the quantity of air required is lesser.
Cross flow cooling tower: Since the air-water contact time is lesser, more air is required to effect heat transfer.

 
Distribution System

Counter flow cooling tower: The distribution is done through channel with lateral pipes, fitted with splash cum spray nozzles. Growth of algae is highly restricted as the lateral pipes are a closed unit and not located in direct sunlight.
Cross flow cooling tower: The distribution is done through open trough systems on the fan deck, fitted with nozzles. Distribution may not be as uniform as the counter flow type and is easily attacked by algae, causing problems like scaling and clogging of openings.

 
Recirculation

Counter flow cooling tower: The problem of recirculation is much less in this case as the air intake is at the bottom of the tower and the discharge is at a much higher level. Further the side walls of the tower are closed till the top of the air intake area.
Cross flow cooling tower: Since the air intake area extends from the bottom to the deck level, the flume discharge is very close to the air intake area at the top. This creates the effect of recirculation wherein the discharged air re-enters the tower through the air intake at the top. This creates a significant reduction in performance.

 
Fill Pack

Counter flow cooling tower: The fill pack can be splash type plastic fill for very bad quality of water and film fill for better quality of water.
Cross flow cooling tower: Only splash type fill used in cross flow cooling towers. Usually splash fill will be V bar or timber laths.

 

 

Components Of The Crossflow Cooling Tower
Cross Flow Closed Type Cooling Tower
Cross Flow Closed Loop Cooling Tower
Cross Flow Closed Type Cooling Tower
Cross Flow Closed Loop Cooling Tower

Fan: Fan is placed on the top of the cross flow cooling tower to induce airflow across the fills. It supplies cool air into the cooling tower. In this way, it helps a lot in the agitation process of a cooling tower.

 

Fill: Water flows down due to gravity and is primarily hexagonal. The cooled air pulled into the tower through the fill interacts with the panels and water is sprayed and showered on that to increase its surface area.

 

Spray nozzles: When the water fills the surface of the hot basin, it drains down the holes and spread throughout the basin’s surface into the spray nozzles. These nozzles enable the water to spread out over a large area.

 

Cold water basin: A particular container is placed at the bottom of the tower to accumulate the water-cooled down through the fill. This container is known as a cold water basin.

 

Makeup water inlet: If there’s a shortage of water required for maintaining proper process water levels in the basin, makeup water enters it.

 

Air inlet louvers: The air inlet louvers prevent external bodies, such as birds, from entering the cooling tower and splashing water.

 

Drift: The component of a cooling tower that indicates water loss is called drift.

 

Drift Eliminator: Air enters through the louvers and fills to drift eliminator.

 

Float: This component regulates the water coming into the tower to replace the lost water as drift. Float opens and closes depending on the level of water in the basin.

 

Drain: Drain is considered to be an essential element of the tower. It is used to regulate the number of salts and sediments accumulated at the bottom of the tower over time.

 

Overflow: It helps to get rid of excess water in the cooling tower basin.

 

Water outlet: The water outlet is the exit port for cooled-down process water.

 

Hot water basin: It is a container used for the widespread accumulation of hot water. The hot water basin evenly passes hot water into the nozzle.

 

Application of Cross Flow Cooling Tower

Power plant

Cross flow cooling towers help cool circulating water used in condensers in power generation facilities.

 

Industrial

Chemical processing, oil refineries, steel mills and manufacturing plants use cross flow cooling towers to maintain optimal temperatures for equipment and processes.

HVAC

Commercial buildings, hospitals, schools and hotels use cross flow cooling towers for air conditioning systems to regulate indoor temperatures efficiently.

Data

Cross flow cooling towers help dissipate the heat generated by servers and IT equipment in data centers, preventing overheating and ensuring continuous operation.

Food and beverage

Food processing plants use cross flow cooling towers to cool equipment, ingredients and products during production processes.

 

Methods to Increase Efficiency in Cross Flow Cooling Tower

 

 

Optimize Water Treatment: Use appropriate water treatment chemicals to prevent scale, corrosion, and biological growth in the cross flow cooling tower. Regularly monitor and maintain proper water chemistry, including pH, alkalinity, and conductivity, to ensure efficient heat transfer.

 

Upgrade Fan System: If feasible, consider upgrading the fan system to more efficient and energy-saving options. Variable frequency drives (VFDs) can be installed to allow the fans to operate at different speeds, optimizing energy consumption based on cooling demands.

 

Install High-Efficiency Fill Material: Consider using high-efficiency fill material in the cross flow cooling tower to maximize heat transfer. Modern fill designs provide increased surface area and improved water distribution, resulting in enhanced cooling efficiency.

 

Optimal Water Level: Maintain the optimal water level in the cross flow cooling tower. Ensure it is neither too high nor too low, as both can negatively impact cooling tower efficiency. Follow manufacturer recommendations or consult with experts to determine the ideal water level for your specific cooling tower.

 

Utilize Variable Speed Drives: If your cross flow cooling tower employs pumps for water circulation, consider using variable speed drives to control pump speed based on cooling load requirements. This allows for more precise control and energy savings.

 

Monitor Performance: Regularly monitor and analyze the performance of the cross flow cooling tower. Measure parameters such as water temperature, flow rate, and energy consumption. By tracking performance, you can identify deviations or inefficiencies and take corrective actions promptly.

 

How to Maintain Cross Flow Cooling Tower
Cross Flow Closed Circuit Cooling Tower

Regular Inspection and Cleaning

Check your cross flow cooling tower for scale, debris, and algae. Cross flow cooling towers use water for heat exchange, which contains salts, minerals, dirt particles, and algae. These can accumulate on the inside of your cooling tower. The buildup gradually reduces the cooling tower's efficiency and might eventually clog the system.

横流闭式冷却塔

Monitoring Water Quality

Water quality will affect your cross flow cooling tower's performance. Poor water quality can cause damage. When it comes to cooling tower maintenance, poor water quality refers to water with low pH levels and excessive pollutants like salts (chlorine and sulfates), microbial contamination (algae, mold, and bacteria), and metal ions (manganese and iron). Check your water quality regularly to avoid these problems.

横流闭式冷却塔

Lubrication and Component Maintenance

You will need to check belts, motors, and bearings during your routine cross flow cooling tower maintenance. These parts can wear out over time. It needs regular care, including lubrication. You can use any high-quality industrial-grade lubricant for this job. Frequent lubrication keeps your fan and other moving parts working smoothly and prevents wear and tear.

Cross Flow Closed Circuit Cooling Tower

Temperature and Pressure Monitoring

Think of temperature and pressure as your cross flow cooling tower's pulse. Any change in this signals a problem. Keep a close watch on the temperature and pressure. Typically, cooling towers operate at ambient pressure, which is about 1 atm or 100 kPa. The temperature of a cooling tower usually ranges between 25 and 30°F. The inlet temperature of the water can be around 75–86°F and the outlet temperature between 104–114°F. However, several factors, including water quality, will affect this temperature range.

 

 
FAQ
 
 

Q: How does a cross flow cooling tower work?

A: The working principle of a cross flow cooling tower is to allow the water to flow vertically through the fill media. In contrast, the air horizontally flows across the water via the louvers. The hot water flows in by gravity, whereas cold air crosses the hot water, resulting in cold water.

Q: Which is better, cross flow or counter flow cooling tower?

A: Both cross flow and counterflow towers have their advantages and the application alone should dictate which type of tower should be used. Cross flow towers will serve better for maintenance access, variable flow, and cold weather operation.

Q: What is the capacity of cross flow cooling tower?

A: Cross flow square cooling Tower is available in capacity for single cell from 100 tons to 1000 tons, various modular combinations of cooling towers are designed to meet different requirements.

Q: What are the advantages of cross flow cooling towers?

A: Separating the air and water streams minimises the reabsorption of moisture and maximises cooling performance. Space Efficiency: Crossflow cooling towers have a compact design, making them suitable for installations with limited space.

Q: Effective maintenance measures for cross flow cooling towers?

A: Effective maintenance practices for crossflow cooling towers include regular cleaning of fill media, inspection of drift eliminators, and monitoring water quality to prevent scale buildup and fouling. Proper maintenance ensures optimal airflow and heat exchange, which directly impacts the overall performance of the cooling system.

Q: What is the difference between cross flow and counter flow cooling towers?

A: With a cross flow cooling tower the air travels horizontally perpendicular) to the water traveling vertically down to the cold basin. With a counter flow cooling tower, air travels in the opposite direction vertically upward against the stream of falling water.

Q: What are the key components of a cross flow cooling tower?

A: The essential components include the fill media, drift eliminators, hot water distribution basins, fans, air inlet louvers, and a cold water basin. The fill media facilitates the exchange of heat between water and air, while drift eliminators minimize water loss.

Q: What types of industries commonly use cross flow cooling towers?

A: Cross flow cooling towers are commonly used in power plants, HVAC systems for large commercial buildings, oil refineries, chemical processing facilities, and manufacturing plants where efficient cooling of process water is essential for operations.

Q: What is the importance of fill media in a cross flow cooling tower?

A: There are different types of fill, such as splash and film fill, with film fill offering a higher heat transfer efficiency due to the thin layer of water spread across the surface.

Q: What is the function of a drift eliminator in a cross flow cooling tower?

A: The eliminators prevent the water droplets and mist from escaping the cooling tower. Eliminators do this by causing the droplets to change direction and lose velocity at impact on the blade walls and fall back into the tower.

Q: How to reduce drift loss in a cross flow cooling tower?

A: Using inverter drives (VSDs) to adjust fan speed and hence vary tower velocities based on cooling requirements may also make sense. This has the potential to greatly reduce drift escape from cooling towers.

Q: How is energy conservation achieved in cross flow cooling tower?

A: Cross flow cooling towers are sized for summer design condition; variable flow enables users to reduce the water flow from the cooling tower to the chiller during cooler seasons. Fans are operated at a lower speed, which reduces energy usage.

Q: How does ambient temperature affect cross flow cooling tower performance?

A: Running at high ambient temperature can bring a difference to the performance. When ambient temperatures rise, the cooling tower's efficiency decreases. The fundamental operation of a cross flow cooling tower relies on the temperature differential between the hot water entering the tower and the cooler ambient air.

Q: Should I get cross flow or counter flow cooling tower?

A: Cross flow cooling towers will serve better for maintenance access, variable flow, and cold weather operation. Counter flow cooling towers may serve better in tight spaces under 750 tons, or in spaces where lower operating weight is required.

Q: What role does water treatment play in the operation of a cross flow cooling tower?

A: Scale and Corrosion Inhibition: Cross flow Cooling Towers employs advanced chemical treatments to inhibit the formation of scale and corrosion within the cooling tower. Scaling can reduce heat transfer efficiency, while corrosion can compromise the structural integrity of the system.

As one of the most professional cross flow cooling tower manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy the best cross flow cooling tower for sale here from our factory. Contact us for custom service.

Cross Flow Closed Water Cooling Tower, cooling tower reliability, closed circuit cooling tower

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